All articles - Mechanics

Bugun jamiyatimizda qanday yutuq va marralarga erishgan bo‘lsak, ularning zamirida biz tanlagan va butun dunyo e’tirof etgan, “O‘zbek modeli” deb nom olgan taraqqiyot yo‘li turibdi. Ana shu yo‘lning ajralmas qismi bo‘lgan, yoshlarimizning ongu tafakkurini, hayotga bo‘lgan munosabatini tubdan o‘zgartirgan ta’lim-tarbiya sohasi rivoji, har tomonlama etuk avlodni tarbiyalash, yuqori malakali kadrlar tayyorlashda muhim ahamiyat kasb etmoqda.

Maqolada changli gazlarni ho‘l usulda tozalovchi apparatni sanoatda qo‘llash va uning tozalash samaradorligini aniqlash rejimlari tavsiya etilgan.

Bugungi kunda dunyoda sanoat changlari va changli gazlarini tozalashda xo‘l usuldan foydalanish tendensiyasi ortib bormoqda. Ho‘l usul dispers sostavi yuqori (zarra o‘lchami 5 mkm kichik) bo‘lgan zarralarni suyuqlik muhitida ushlab qolishda samarali hisoblanadi.

Subject of the inquiry: the protective carcass of a cabin of universal wheel tractor-cultivator.
Aim of the inquiry: design procedure working out on durability and the substantiation of strength parameters of the carcass of cabin of tractor of a class 1.4.
Methods of inquiry: Researches were spent by methods of mathematical and experimental modeling of deflections of elements of the bearing carcass of the cabin of the tractor at overturning in quasi-static to statement
The results achieved and their novelty:
- the mathematical model of calculation of the carcass of the cabin of the tractor on durability is made;
- the design procedure of the protective carcass of the cabin of the tractor on durability taking into account process of distribution of a zone of plastic deformation on length and height of cross-section section of elements of the construction of the carcass;
- Dependences strength properties of rod elements of the construction of the carcass from the bend and curvature moment.
Practical value: the cabin design procedure on the durability is developed, allowing at a design stage and operational development of a design with high degree of reliability to receive demanded strengthening characteristics (the Patent for the computer program № DGU 01583). The multiple analysis of the construction of the cabin of tractor TTZ 80.20 is carried out and the new carcass of the cabin of the tractor (the Patent for utility model № 1'AP 00563) is offered.
Degree of embed and economic effectiveness: Results of work are transferred to special design engineering bureau “Tractor” for practical use at carrying out of developmental works on modernization and construction development of new carcass of cabins of tractors.
Sphere of usage: automobile construction and tractor construction.

Subject of the inquiry: steering wheel of self-driven energetic vehicle means.
Aim of the inquiry: the aim of this inquiry is to rise the stability of the motion and conducting of self-driven means by rational choice of transmission ratio of the steering wheel.
Methods of inquiry : the analytical and experimental research methods are used in the work based on methods of automatic regulation theory.
The results achieved and their novelty: the character of the influence of the transmission ratio quantity on the sensitiveness of the machines the control and stability of the motion are used
The mathematical models for calculation of parameters of the motion of selfdriven energetic means with hydro-huged characters of the steering wheel and the choice of mounting coordinates of carried out hydrocylinders are worked out.
Practical value: the recommendations on the choice of transmission ratio of steering wheel and mounting coordinates of carried-out hydrocylinders rising stability of the motion and improving conduction of self-driven energetic means are worked out.
Mathematical models allowing to realize rational choice of parameters of steering wheel on the stage of project are created.
Degree of embed and economic effectiveness: recommendations on the choice of the quantity of transmission ratio of steering wheel and calculated definition of rational parameters of mounting hydrocylinders of the wheel implement are accepted for the usage in SSC (GAO) "Tashkent Tractor Plant".
Sphere of usage: tractor and agricultural machine-building.

Topicality and demand of the subject of dissertation. At the present stage of development there is a distinct steady growth in consumption of motor fuels in Uzbekistan, which necessitates the use of alternative raw material resources and efficient use of conventional oil resources for their production.
Alongside with this, the emerging worldwide trend of gradual depletion of oil stock, increase in share of heavy crude oils in hydrocarbon processing output, strengthening of requirements to operational and environmental characteristics of motor fuels dictates the need to find alternative energy resources for expansion of motor gasoline and diesel fuel production.
It should be noted that, until now, there has been no in-depth research of specific features of gasoline and diesel fuels production using plant materials, byproducts of oil refining and chemical industries as fuel additives, heavy crude oils processing for maximum extraction of motor fuel components in terms of physical-chemical mechanics of oil dispersion systems; there is virtually no experience of extraction and ways of use of oil shale tars of the republic deposits as alternative sources of fuels.
Availability of huge capacity for methanol production makes it important to conduct integrated studies on production of gasoline-methanol fuel mixtures with improved environmental characteristics. The ethanol resources available in the country and opportunities to obtain biobutanol make it relevant and actual to conduct research and development of effective gasoline additives on their basis.
The resolution of the Cabinet of Ministers of the Republic of Uzbekistan «Program of action for environmental protection of the Republic of Uzbekistan for 2008-2012» of 19.09.2008 №212 seeks rational and complex use of oil and gas condensate, including heavy oil resources, the introduction of clean and resourceefficient technologies, including technologies for use of renewable energy sources.
The tendency for increase in share of processing of composite oil-gas condensate stock necessitates the revision of the existing and development of new technological solutions for the selection of optimum composition of mixtures of heavy oil and gas condensate with a view to ensure maximum extraction of light fractions in the course of processing based on the theory of controlled phase transitions in oil dispersion systems with estimation of criteria for determination of optimum ratios of raw components in composite materials.
Uzbekistan possesses huge oil shale reserves. Similar origin of organic substances of oil shale, the similarity of their composition to that of oil stock makes it topical to study the methods for separation of organic components of oil shale and development of ways for their conversion into motor fuel components.
Demand of the subject of dissertation lies in development of scientific and technological bases for motor fuels production with involvement of local plant materials, products of secondary oil processing, optimization of joint processing of heavy crude oils and gas condensates with directional regulation of yield of light fractions, development of methods for use of non-conventional sources of raw materials for production of fuel components, improvement of operational and environmental characteristics of motor fuels
Purpose of research is development of the scientific and technological bases for gasoline and diesel fuel production on the basis of local raw material resources.
Scientific novelty of dissertational research consists in the following:
It has been established that gasoline-methanol mixtures up to 5% methanol content make no corrosive attack on «valve-seat» sections of gasoline injectors, rubber seal rings and aluminium materials, and usage of such mixtures results in reduction of hazardous emissions - carbon monoxide (CO) and hydrocarbons (CH) up to 40-45%;
It has been found that involvement of biobutanol in gasoline-methanol and gasoline-ethanol mixtures in quantity comparable to methanol and ethanol content increases the permissible quantity of residual water in the mixture to ensure the predetermined cloud point temperature by more than 60% relative and 150% relative, respectively;
there has been developed the histograms of dependence of gasoline octane number maintenance by means of replacement of monomethylaniline with methanol and ethanol, and it was found that 5% of methanol reduces monomethylaniline content in gasoline by 35% relative, 7% ethanol - by 40% relative;
there has been developed a method for diesel fuel production with involvement of by-products of secondary refining processes and proposed dependence criteria for determining their limit content in fuel composition;
there has been determined the specifics of refining of heavy oils of Surkhandarya deposits in mixture with gas condensate in terms of physicochemical mechanics of oil dispersion systems. It is found that more than 30% content of gas condensate and more in mixtures causes increase in yield of light fractions up to 4% compared to the yield, calculated according to the rule of additivity;
there has been determined the optimum condition for extraction of oil shale tars in the course of their processing: pyrolysis temperature - 550°C, pyrolysis temperature retention time - 45 minutes. It has been demonstrated that preliminary preparation of oil shale of Baysun deposits through alkaline and bacterial treatment allows for reduction of sulphur content in oil shale tars up to 40-70%, increase in depth of extraction of shale tar samples by more than 60% relative.
CONCLUSION
1. For the first time there were conducted integrated studies on production of gasoline-methanol mixtures on the basis of local raw material resources, including benchmark and field testing, acceptability of primary components was demonstrated.
It is found that gasoline-methanol mixtures with up to 5% methanol content do not make corrosive attack on «valve-seat» sections of gasoline injectors, rubber seal ring s and aluminium materials, and, when using moisture free base gasoline and methanol (99,95%), mixtures demonstrate resistance to segregation, sufficient for moderate climate conditions of the Republic.
Results of benchmark tests supported power maintenance of engine running on gasoline Al-91 with 3% and 5% methanol, reduction of specific fuel rate approximately to 2.5%, reduction of hazardous emissions - carbon monoxide (CO) and hydrocarbons (CH) by 40-45% in comparison with the base gasoline.
2. There was prepared biobutanol from plant material and demonstrated efficiency of its use as a part binary oxygenates, determined its role in regulating phase stability and improvement of octane characteristics of gasoline containing methanol and ethanol.
3. There were developed methods for improvement of environmental performance of motor gasoline using additives on the basis of mixed composite combinations of oxygenates - methanol, ethanol, in combination with nitrogen- and manganese containing dopants. There were developed some histograms of dependence of octane number maintenance of commercial gasoline with different concentrations of binary additives on the basis of methanol and ethanol.
High performance characteristics of developed composition of gasoline Al-80 of Fergana Oil Refinery, with the component composition, % by weight: directly distilled gasoline fraction-55.41; stable catalyst - 33.64; gasoline of delayed coking units - 9.9; antiknock additive ADA-Super - 1.01; antiknock additive Hi-tech 3062 - 0.04 confirmed by results of qualification tests.
4. There were proposed methods for diesel fuel production with involvement of by-products of oil-refinery - light coking distillate and overhead vacuum distillate of fuel oil vacuum distillation unit, which enabled to obtain additional resources in amount up to 5-7% of the volume of commercial diesel fuel. Proposed dependence criteria for determination of limiting quantities of by-product added to diesel fuel.
5. As a result of experimental-production studies there was studied of the specifics of heavy oil processing in combination with gas condensate from the fields of the republic, and demonstrates that directional regulation of their ratio in mixture in terms of physicochemical mechanics of oil dispersion systems is a way of maximizing extraction of light fractions.
There were developed the methods of control of optimal ratio of heavy oils and gas condensate in the course of their joint processing for maximum extraction of light fractions using dependence of viscosity characteristics of mixtures.
6. There was studied the processing of oil shale with a view to obtain alternative motor fuel components, selected an optimal mode of oil shale tar extraction using the developed laboratory instrument of high-temperature processing of oil shale, optimal pyrolysis conditions determined the following parameters: pyrolysis temperature - 550°C, pyrolysis temperature holding time - 45 min.
7. Determined the role of preliminary treatment of oil shale in pyrolysis results. It is demonstrated that alkaline treatment of oil shale leads to removal of reducing forms of sulfur. The most effective removal of reducing forms of sulfur (up to 83%) occurs when the concentration of NaOH is equal to 1%. Biological treatment of oil shale causes increase in shale tar yield. It is found that tar output from treated oil shale made 18.0%, or more than 60% of relative tar yield from source oil shale. Stage of acidification of oil shale material by sulfuric acid solution leads to increase in tar yield at 21.3% R.H.
8. For the first time, there was demonstrated the possibility of use of shale tars as an alternative raw material for production of motor fuel components, substantiated the technology of shale tar processing together with oil stock with the use of conventional technologies and oil refining processes.
9. It has been established that the gradual acidification leads to development of local («native») microflora of shale material, causing significant increase in liter slurry of iron oxidizing bacteria As. Ferrooxidans, which is the main type bacteria currently used in technologies of mineral raw materials processing, since the very existence in the original shale of «inoculating material» of iron oxidizing bacteria w ill be a source of replenishment of bacteria needed for oil shale processing.
10. In industrial conditions of the Fergana Refinery there was developed a process flow diagram of preparation, introduced the technology of diesel fuel production using by-products of oil refinery - light coking distillate and overhead vacuum distillate in accordance with the requirements of the standard for summer diesel fuel, developed and implemented a temporary production technology of pilot batches of gasoline-methanol mixture, Specifications TSh 39.3-285:2012 «Automobile methanol gasoline» for motor spirits of grades AI-80-M1, 3 and 5 (with 1, 3 and 5% methanol respectively) and A1-91-M1, 3 and 5 have been developed, approved and registered in the Agency Uzstandard. There was developed and implemented the guidelines for preparing and processing of heavy oils and gas condensate mixtures in optimal ratio at JV Jarkurganneftepererabotka. Appropriate certificates confirm cost of economical efficiency of dissertation results.

Topicality and demand of the subject of dissertation. Comprehensive measures taken by the Government of the Republic of Uzbekistan for the development of a regional and territorial control and automated creation system of a single information space, focused on the widespread introduction of information control systems based on modern information and communication technologies. In this regard, the development of efficient methods and algorithms for state estimation and control of various functional purpose and is of particular relevance, however, remains not completely solve theoretical and applied problems of wide national economic significance. The development of complex information processing systems and controls, in particular, systems of technological objects, stimulated constant increase of the performance requirements of accuracy. This task is especially difficult in real conditions of a priori uncertainty and unexpected variability of the models and the external environment. Under these conditions the introduction of the adaptation and monitoring of the system carried is expedient in relation to significant disturbance model, which can not be considered as a simple evaluation of interfering factors and which will significantly improve the quality of the system as a whole. Thus, the development and the development of effective means and methods of adaptation of the control system in conditions of high uncertainty a priori in the real-time rate will effectively handle the data of observations significantly improve the accuracy and reliability of information processing and control.
Demand dissertation is characterized by the widespread introduction of modern concepts of automation and control of complex engineering in various industries, including chemical, associated with tasks requiring close attention estimation, identification and management of objects in an uncertain environment.
This research work is focused on ensuring implementation of the Resolution of the President of the Republic of Uzbekistan the №PP-677 of 27.07.2007 y. "About the Program of modernization, technical and technological modernization of the enterprises of chemical industry", which states that one of the main objectives of the Programme is to improve the technical level and production efficiency, ensuring operational reliability and environmental safety of chemical production by introduction of modern high technology equipment and advanced process control systems.
Accordingly, the solution of these problems requires special research and development aimed at further improving the efficiency of process control systems based on modern information technology.
Thus the practical implementation of these methods of adaptation and control faced with the need to solve a variety of inverse problems of managed dynamics objects. Problems of this type are essentially ill-conditioned. They belong to the class of ill-posed problems. In this situation, the problem of synthesis methods and algorithms for adaptive state estimation control objects in the face of  uncertainty should be considered in terms of the theory of regular evaluation, defining the methodology for constructing stable algorithms for processing the current information. In this regard, the development of efficient methods and algorithms for regular adaptive state estimation process facilities control under model uncertainty and synthesis of computing circuits for their implementation acquires great importance.
Purpose of research is to develop methods and algorithms for regular adaptive state estimation process facilities control under model uncertainty and their practical application in solving problems of automation and control of specific production processes.
Scientific novelty of dissertational research consist in the following:
the algorithms of the regular evaluation of noise covariance matrix of the object developed, based on methods for solving nonlinear functional equations, taking into account the possible undecidability of the linearized system with singular or ill-conditioned matrix, allowing for the convergence of the desired solution, and thereby improve the accuracy of adaptive estimation procedures;
proposed adaptive algorithms regular state estimation control objects in a consistently correlated noise in measurements based on singular value decomposition of matrices, allowing for binding of theoretical covariance matrix of the estimation error to the actual value, and thereby eliminate the isolation process of calculating the gain matrix of Kalman filter from actual measurements;
proposed adaptive algorithms regular iterative estimation of noise covariance matrices of the object and noise measurements based innovation process and secant method that does not require calculation or approximation of partial derivatives, allowing the filter to adapt to the changing values of the covariance matrices of disturbances;
developed regular algorithms of adaptive estimation of the gain matrix of Kalman filter based on the gradient projection method and derive expressions for the error estimates right side of the matrix equation for the calculation of the gain, allowing not made directly solving the matrix equation to estimate the error of his decision;
proposed regular algorithms of adaptive estimation under auto- and crosscorrelation of noise and interference measurements of the object on the basis of approximate methods for solving ill-conditioned or singular stochastic systems of linear algebraic equations which can improve the accuracy of calculating the gain of a dynamic filter;
developed regular algorithms of adaptive estimation of the transition matrix of control objects on the basis of methods for solving variational inequalities in the framework of the principle of iterative regularization to ensure consistency and convergence of the required assessments;
proposed regular algorithms of adaptive parameter estimation of the transition matrix of managed objects and gain dynamic Kalman filter type in a complete a priori model uncertainty, allowing estimation regularize the problem under consideration on the basis of regular methods of minimizing functionals.
CONCLUSION
The thesis is based on the concepts of system analysis, the theory of adaptive control systems, and methods for dynamic filtering solution of incorrect problems developed constructive methodology regular adaptive state estimation process facilities control under model uncertainty.
As a result, the following results:
1. Algorithms for the regular assessment of noise covariance matrix of the object, based on methods for solving nonlinear functional equations, taking into account the possible undecidability of the linearized system with singular or ill-conditioned matrix, allowing for the convergence of the desired solution, and thereby improve the accuracy of adaptive estimation procedure.
2. The algorithms of adaptive regular state estimation control objects in a consistently correlated noise in measurements based on singular value decomposition of matrices, allowing for binding of the theoretical covariance matrix of the estimation error to the actual values, and thereby eliminate the isolation process of calculating the gain matrix of the Kalman filter real
measurements.
3. The algorithms of adaptive regular iterative estimation covariance matrices of noise and interference measurements of the object based on the innovation process and the secant method does not require calculation or approximation of partial derivatives, allowing for the convergence of approximations of the desired filter and adapt to the changing values of the covariance matrices of disturbances.
4. Develop a regular algorithms adaptive estimation of the gain matrix of Kalman filter based on the gradient projection method. The expressions for the error estimate the right side of the matrix equation for the calculation of the gain, allowing not made directly solving the matrix equation to estimate the error of his decision. For the resulting expression can also obtain a priori information about the order of error in the solution to obtain qualitative conclusions about the accuracy with which a reasonably continue to solve the system.
5. The proposed two-step regularized algorithms with adaptive estimation of correlated noise object to obviate the strict dependency matrix filter gain from a priori data. It is shown that the solution of this problem are very effective methods pseudoinversion regularization, l\ - minimization and moderate damage to the choice of the regularization parameter based methods quasioptimality, cross significance and A-curve.
6. A regular algorithms of adaptive estimation in terms of noise autocorrelation of the object and noise measurements on the basis of approximate methods for solving ill-conditioned or singular stochastic systems of linear algebraic equations. In forming the estimation algorithms use statistical shape discrepancy principle, achieve the best possible estimates of the regularized solutions approximate stochastic systems of equations.
7. Develop a regular adaptive estimation algorithms with mutual correlation of noise and interference measurements of the object based on decorrelation noise and interference, and regularization methods for solving operator equations with positive definite matrices and approximately given right-hand side, to improve the accuracy of calculating the gain of a dynamic filter.
8. A regular adaptive algorithms for estimating the parameters of the equation matrices dynamics control objects and covariance matrices of perturbation based on the concepts of time series, allows to synthesize the adaptive control system in a high degree of model uncertainty.
9. Develop regular algorithms adaptive estimation of the transition matrix of control objects on the basis of methods for solving variational inequalities in the framework of the principle of iterative regularization to ensure consistency and convergence of the required assessments.
10. A regular adaptive algorithms for estimating the parameters of the transition matrix of managed objects and gain dynamic Kalman filter type in a complete a priori model uncertainty, allowing estimation regularize the problem under consideration on the basis of regular methods of minimizing functionals.
11. The algorithms of synthesis of control systems dynamic objects using predictive models based on the concepts of regular adaptive estimation under varying degrees of model uncertainty that improve the accuracy of the computation of the vector of state variables and control actions.
12. On the basis of the proposed adaptive algorithms for regular state estimation control objects in a model uncertainty developed adaptive process control system granulation-drying calcium sulfate and phosphate pulp production PS-Agro and evaporation of ammonium nitrate solution. The proposed adaptive control systems allow these processes to stabilize the technological regimes of the processes and increase the efficiency of their operation.

Мавзунинг долзарблиги. Узбекистан мустақил бўлгач, жадал ривожланиш, давлат ва ижтимоий ҳаётининг барча сохаларини тубдан ўзгартириш, бозор муносабатига ўзига хос йўл танлаб, босқичма-босқич ўтиш тамойилини тутди.
Халқ хўжалигининг барча тармоқлари фаолияти янги босқичига ўтишни ўзаро манфаатдорлик, ташқи иқтисодий алоқалар асосида кўрмокда. Хорижий мамлакатлар билан иктисодий ва сиёсий алокаларнинг жадал ривожланаётган шу даврида республика автотранспорт сохаси тараққиёти мухим ахамиятга эта.
Давлатимиз рахбарияти ва президентимиз автомобилсозликни ривожлантириш ва транспортдан самарали фойдаланиш масалаларига катта эътибор бермокдалар.
Шу мақсадда Республикамизда бир катор автомобил компаниялари барпо қилиниб, уларнинг ишга туширилиши Узбекистан халқининг мухим ютукларидан биридир. Андижоннинг Асака шаҳрида "УзДЭУ авто Со" компаниясида сигил автомобилларнинг ишлаб чиқарила бошлаши Узбекистан аҳолисининг транспорт мустақиллигига эришишига олиб келибгина колмай, Республикамизни автомобил ишлаб чикарувчи стакчи давлатлар билан бир қаторда туришига имкон яратади. Албатта, бундай холат, бир томондан аҳолининг моддий, маданий бойлигини оширади, унинг транспорт воситаси хизматига бўлган талабини кондириб, турмуш фаолиятида бир катор кулайликлар яратса, иккинчи томондан снгил автомобилларга техник хизмат кўрсатиш (ТҲК), таъмирлашлар, ёнилғи- мойлаш махсулотлари, эҳтиёт қисмлари ва бошқалар билан таъминлаш каби бўлган ишларга эхтиёж орттиради.
ТҲК ва таъмирлаш ишларини бажариш учун автомобил эксплуатацияси давридаги умумий харажатлар ичида асосий кисмини, яъни 90 % га якинини ташкил этади. Мсхнат сарфини олиб ҳарасак, автомобилнинг хизмат даврида ТҲК ва таъмирлаш ишлари учун кстган меҳнат сарфи 96,5... 98,5 % ташкил этади.
Демак, автомобилларни самарали ишлатиш учун автомобилларни мунтазам равишда ташхислаш ва ўз вактида носозликларни бошланишидаёк бартараф этиш ксрак бўлади. Ватанимизда ишлаб чиқарилаётган автомобилларимиз жахон бозорида ўз ўрнига эга бўлиши учун уларнинг конструкцией ва эксплуатацион ишончлилиги халқаро стандартларга тўла жавоб берадиган даражада бўлиши зарур.
Республикамиз худуди ўзига хос иқлим ва йўл шароитларига эга бўлганлиги сабабли, автомобилларнинг эксплуатацией ишончлилиги мўтадил иқлим ва йўл шароитига нисбатан бир капча пасаяди, чунки Ватанимиз худуди қуруқ иқлим шароити, то\ли зоналари, чўл зоналаридан иборат бўлганлиги, хаво босими ва хароратининг ксскин ўзгариши ва энг асосийси хаво таркибида чанг миқдорининг кўплигидир. Чанг таркибидаги абразив зарралар автомобил деталлари ейилишини жадаллаштиради ва бунинг оқибатида уларнинг эксплуатацион ишончлилиги пасаяди. Шунингдек, абразив зарралар сую клик ва хаво билан бирга ишчи органлар ичига тушиб, уни ишдан чиқишини тезлаштиради. Шундай килиб Республикамиз иқлим ва йўл шароитида “Тико”, “Дамас” ва “Матиз” автомобилларининг эксплуатацион ишончлилигини таъминлаш учун махсус тадқиқот ишларини амалга оширишни такозо этади.
Рсспубликамизда автомобиллар ишончлилигини тадқикотлаш ишлари талаб даражасида эмас, чунки автомобил ишлаб чикариш мустақиллик даврига тў\ри келиб, энди ривожланмоқда. Рсспубликамизда бир қатор олимлар бу йўналишда илмий-тадқиқот ишлари олиб боришган ва олиб бормокдалар. Булардан: академик О.В.Лебедсв, профессор С.М.Қодиров, К.Х.Махкамов, доцент Я.П.Назаркулов, аспирант Б.Қаюмов, магистрант О.Эргашев ва бошқаларни кўрсатиб ўтиш мумкин. Бу сохадаги мавжуд илмий изланишлар натижалари замонавий автомобиллар, жумладан, “Тико”, “Дамас” ва “Матиз” автомобиллари эксплуатацион ишончлилигини бахолашда етарли имкон беради. Лскин ушбу автомобиллар ИЁДларини ташхислаш бўйича етарли маълумотлар камлик қилади, шунингш учун бу борада илмий-тадқиқот ишларини тезлаштириш зарур.
Тадқиқотнинг максади ва вазифалари. Ушбу илмий тадқиқот ишларини бажаришдан максад, Узбекистан Республикасининг иқлим ва йўл  шароитларини хисобга олган холда, “Тико”, “Дамас” ва “Матиз” автомобилларининг ИЁДларини ташхислаш бўйича маълумотлар тўплаш ва унга таъсир этувчи етакчи омилларни аниқлаш асосида илмий ва амалий тавсиялар ишлаб чиқишдир. Бу изланиш ва тавсияларнинг умумий мазмуни ва йўналиши қуйидагилардан иборат бўлади:
1. Узбекистоннинг турли иқлим ва йул шароитларида “Тико”, “Дамас” ва “Матиз” автомобиллари ИЁДларининг ишдан чикиши ва унинг сабабларини аниқлаш.
2. “Тико”, “Дамас” ва “Матиз” автомобилларининг ИЁДларини ташхислаш йўллларини аниклаш.
3. “Тико”, “Дамас” ва “Матиз” автомобилларининг ИЁДларини ташхислаш эвазига автомобилларнинг ёнил\и тсжамкорлигини ошириш.
Тадқиқотнинг илмий янгилиги. Изланиш ва тажрибалар шуни кўрсатдики, шу пайтгача автомобил ИЁДлари бирор носозликка учраб, улар тўхтаб қолганда, ишлаганда ҳам ночор ишлаганда, ёки улардан бирор бир ўзгача шовқин эшитилгандагина уларга ташхис қўйилар эди. Дархақиқат, уларни носозликка учрашининг бошланғич босқичларида ташхислаб ўтирилмас эди, балки навбатдаги ТҲКда рсжалаштирилган ишларни бажариш билан кифояланар эди. ТҲКларда эса ташхислаш рсжалаштирилмаган эди. Мазкур магистрлик дисссртациясининг илмий янгилиги- автомобил ИЁДлари ишлатилаётган, ёки уларга навбатдаги ТҲК пайтларида келгусида авж олиши кутилаётган носозликларни бошлангич боскичларидаёк аниқлаб бсришга мўлжалланган замонавий электрон ташхислаш воситасининг конструкциясини яратилиши ва унинг ёрдамида ИЁДда содир бўлаётган кимёвий ва иссиқлик жараёнларининг миқдорий катталикларини аниқлаш имкониятини мужассам этишдир.
Диссертация ишининг илмий янгилиги қуйидаги натижаларда акс этади:
Ҳозирги мавжуд ташхислаш воситалари замонавий автомобиллар учун тўғри келмайди, бунинг сабаби- улар асосан ИЁД бирор носозликка учрагандан сўнг уни аниклаш учун қўлланилади. Мазкур магистрлик дисссртациясининг вазифаси- ИЁДларини ишлатиш мобайнида ишончлилигини тадқиқотлаш, таҳлил этиш ва бошкариш учун ташхислашнинг янги самарали усул ва техник воситаларини топишдир.
ИЁДларининг ишончлилик кўрсаткичларини, иш жараёнида носозликка учрашини физик ва тасодифий хусусиятларини ташхислаш эвазига уларнинг кўрсаткичларини дунё ва Европа андозаларига етказиш Узбекистан автомобилсоз олимларнинг асосий мақсадидир.
Мазкур магистрлик дисссртацияси хам шу асосий мақсадни рўёбга чикаришга бир оз бўлсада ҳисса қўшишга бағишланган бўлиб, бунда бажариладиган ишларнинг асосий мақсади ва вазифалари қуйдагилардан иборатдир:
Енгил автомобиллар ИЁДларига ТҲК ва уларни таъмирлаш даврийрилигини оширишда ташхислаш усул ва воситаларининг ахамиятини
аниқлаш.
Носозликка учраган ИЁДини ташхислаш воситалари ва усулларини тахлил қилиш.
Ишлатилаётган ИЁДини ташхислаш воситалари ва усулларини тахлил қилиш.
Замонавий сигил автомобиллар ИЁДлари учун янги ташхислаш воситалари ва усулларини топиш.
Мавжуд ва янги ташхислаш воситалари ва усулларини ўзаро тақкослаш.
«Узавтотсххизмат» х/ж учун янги ташхислаш воситалари ва усуллари бўйича тавсиялар ишлаб чиқиш.

Объекты исследования: являются колёсные пары локомотивов.
Цель работы: является разработка методики оценки влияния слоя смазки, между поверхностями рельсов и колес локомотива на закономерность интенсивности износа и контактные напряжения между ними.
Методы исследования: методы теории контактных напряжений и колебаний, метод операционного исчисления, элементы теории вероятности. Практическая значимость: Результаты исследования позволяют рассчитывать оптимальное обслуживание и интервалы ремонта, а так же эффективное распределения расходов по ремонту подвижного состава.
Область применения и степень внедрения: разработана и внедрена методика и инструкция по контролю износа бандажей колёсных пар локомотивов в условиях ГАЖК «Узбекистан тамир йуллари».
Экономическая эффективность: 1302034сум на одну секцию электровоза до допустимого износа бандажей по толщине
Научная новизна диссертации заключается в разработке научных подходов и практических рекомендаций по совершенствованию технологии использования смазки бандажей колёсных пар локомотивов в условиях Среднеазиатского региона.
1. Разработана математическая модель импульсных колебаний в зоне контакта модели бандажа колёсной пары локомотива и рельса, разделённых тонким слоем смазки.
2. Разработана методика расчёта, эквивалентов модулей упругости смазок как смесей с твёрдыми наполнителями.
3. Разработана методика экспериментальной оценки контактного взаимодействия при введении слоя смазки между поверхностями.
4. Проведены расчётные исследования и разработана методика по оценке закономерностей влияния смазки на контактные напряжения и интенсивность износа поверхностей бандажей колёсных пар локомотивов ВЛ-80 в условиях эксплуатации на ГАЖК «УзТЙ».
5. Разработаны рекомендации по оценке сроков полезного использования бандажей колёсных пар локомотивов.

Subjects of the inquiry. Estimating abrasive wearing of machine parts and wear resistance of friction pairs in which the processes do not accompany with chemical interaction with the environment and also relative wear resistance of rails.
Aim of the inquiry. Theoretical and test investigation of metal materials wearing using thermodynamic, dislocation, kinetic approaches and working out on this base calculating methods of forecasting surface strength of materials during friction process.
Method of inquiry. Thermodynamic methods using the I and II lows of the thermodynamic, achievements of the irreversible thermodynamic, dislocation and kinetic theories of materials strength.
The results achieved and their novelty. Pathbreaking tested and received unique results of investigation of energy and entropy balances with abrasive wearing process.
An original method, special testing set, devices, flow charts for testing energy and entropy balances of abrasive wearing process arc worked out Theoretically based and acknowledged by tests new properties and laws of metal wearing process consisted in that wear takes play when deformed volumes of friction pairs accumulate limit density of internal energy or limit density of entropy. Showed that these characteristics do not depend on friction conditions and there arc constants correlated with thermal physic properties of materials.
Suggested a few thermodynamic criteria for estimating wear resistance of metals and alloys: limit density of internal energy, limit density of entropy, material capacity of energy accumulation, coefficient of deformation hardening and obtained analytical equations which arc the scientific base of estimating and forecasting wear resistance of friction pairs.
Practical value. Worked out a method of calculating friction pairs abrasive wear and rails wear resistance which give an opportunity for forecasting wear resistance of materials during designing stage and also use Delphi methods for estimating wear resistance of rails purchased by the railway enterprises on tender stage. Obtained 2 patents in the State Patent Department of Republic of Uzbekistan.
Degree of embed and economic effectivity. The scientific works out arc introduced in Railway Company “ Uzbekistan temir yullari ” with economic effect about 4 060 000 000 sum, and also in education process in the Tashkent Institute of Railway Engineering, in the Tashkent State Technical University and Andijan State University.
Sphere of usage. The results of investigation may be used at designing of machines and mechanisms friction units, at purchasing rails by the railway transport enterprises and also in education process in High school.

Subjects of the inquiry: bearing of the swing and new swabbing material on base gudrone of vegetable oils.
Aim of the inquiry: development methods theoretical estimation factor, influencing upon wear capability element bearings of the swing and increasing to their wear capability with using designed multifunctional of the plastic lubrificants.
Methods of inquiry: used methods comparative analysis result theoretical and experimental studies of the wear-out element bearing of the swing.
The results achieved and their novelty: They are received analytical dependencies of the calculation geometric and kinematic parameter, influencing upon of wear element bearing swings and determination of the factor of friction between element of the bearing and abrasive particle; the designed methods of the theoretical estimation to velocities of wear and sizes of the abrasive particles, participating in process wear element bearing of the swing; high wear capability plastic lubrificant is designed on base gudrone of vegetable oils; designed stand for test bearing swings with new constructive decision, allowing value wear capability of the designed lubrificants.
Practical value: The new lubrificant is designed on base gudrone of vegetable oils received on base resource local secondary cheese and is determined that he has high efficiency than traditionally applicable lubrificants.
Degree of embed and economic affectivity: The Designed lubrificants on base gudrone of vegetable oils passed production test on agricultural machine of SjsC Yakkabag machine-tractor park of Kashkadarya region (the act about introduction result test from april 13, 2010) and excavators ore management «Kalmakir» Almalik blazed-metallurgical combine (the act about result of the production test from august 20, 2010) and have shown that these lubrificants have high wear capability. The designed lubrificants are recommended for broad using in machine and mechanism data enterprise.
Using designed swabbing material at usages tractor for 1000 conditional tractors costperformance forms 94 432 thousand sum, made for 834 tractors cost-performance forms 55 544 thousand sum.
Sphere of usage: machine-building, tractor-manufacturing, agriculture.

Subjects of the inquiry: The work is devoted to studing to inverse problem by S'-function of scattering theory and by the spectral function for Dirac’s operator.
Aim of the inquiry: To study the inverse spectral problem for Dirac’s operator.
Method of the inquiry: In the work are used the methods of functional analysis, spectral theory of linear operators, the theory of functions of complex variable and theory differential equations.
The results achieved and their novelty: The main results of this work are new and consist of the following:
1) the regularized trace formulas for Dirac’s operator with peculiarity in the potential is calculated by Lax’s method;
2) the inverse scattering problem for Dirac’s operator is studied by following conditions:
(a) p(x), q(x) sufficiently quickly tends to zero as x—>oo, where xe[a,oo), a e R';
(b) spectrum of the problem Dy = Лу, yf(a) = 0 (-oo<x<a) is discrete;
3) Dirac operator with mass which has a countable number of eigenvalues in the continuous spectrum is constructed and for the constructed operator the sufficient conditions to belong coefficients p(x), <?(x) to the space Z/’(0,=o) are found;
4) the position’s dependence of eigenvalues in the continuous spectrum Dirac’s operator with mass from the common boundary condition is studied.
Practical value: the work have theoretical character.
Degree of embed and economic effectivity: on the basis of the received results a special course will be read for the students of the magistracy.
Sphere of usage: the obtained results may be used in spectral theory of linear operators, in mathematical physics for integration of nonlinear equation as well as quantum mechanics and other areas of natural subjects.

Subject of investigations: fractured porous media, saturated by homogeneous liquid. Aim of investigations: arguing the quasi-stcady approach at the modeling of liquids filtration processes in fractured porous media (FPM), estimation some non-stcady approaches.
Methods of investigations: to set filtration equations of homogeneous liquids in FPM by using basic principles of mechanics (balance laws) as well as phenomenological approaches, widely using in subterrian hydro-gas-mcchanics, numerical solving of these equations by checking stability and convergence of methods, physical interpretation of results and its comparison with existing results.
Results achieved and their novelty: in the work a character of the solutions jumps spreading is firstly investigated for the “truncated” and simplified systems of filtration equations in FPM. With accounting the non-steady correction in the massexchange flow from porous blocks into fractures a system of filtration equations of homogeneous liquids in FPM is derived. Ranges of correct works of these equations with respect the characteristic time of the non-steady correction arc estimated. To investigate a dynamics of the mass-exchange flow equations of filtration in an element consisting of an fracture and a surrounding porous block were derived. The results of the work allow us in some sense to determine a mechanism of the massexchange process in FPM and to estimate the ability of the classic quasi-stcady approach. The results of the work allow us also to make important conclusions about dynamics of mass-exchange flow and ability of quasi-stcady approach.
Practical value: results achieved can interpret oil, gas, water and condensate flows in oil-gas-condensate reservoirs.
Degree of embed and economic effectively: the work has an theoretical character, achieved results allow us to make a more deep insight into the mechanism of liquids in FPM.
Fields of application: results of the work can be used at hydrodynamical test of fractured porous oil reservoirs, at oil and gas recovery processes.

Subject of research: Arbitrary walled circular cylindrical layer (shell), interacting with viscous compressible fluid.
Purpose of work: Development of method and reducing vibration equations of arbitrary walled cylindrical clastic layer with account of interacting viscous compressible fluid and external dynamic loading; development algorithm of defining SSS of systems and solution of vibration problems of layer and shell.
Method of research: 3D theory of elasticity, methods of Fourier and Laplace transformations, method of decomposition in power series.
The results obtained and their novelty: Developed deducing method of nonstationary vibration equations of arbitrary walled cylindrical layer with account of interacting viscous compressible fluid; deduced new vibration equations of considering hydroclastic system, taking account of rotatory inertia and transversal shear deformation; dynamic reaction laws of interacting fluid is defined; Algorithm defining SSS of system is developed; New problems about torsional, longitudinal harmonic wave propagations and wave processes in cylindrical layers containing viscous compressible fluid.
Practical value: of the thesis has theoretical character; practical value of investigation is connected with application abilities of developed vibration theory and analytical methods to actual applied problems about vibrations of circular cylindrical layers and shells, interacting with viscous fluids.
Degree of embed: Results of investigation is used in realization grants of the Committee for coordination science and technologies at the Cabinet of Ministers of the Republic Uzbekistan: №26/99 (1999-2000); ОТ-Ф1.-132(2007-2011).
Field of application: results and methods presented in the thesis, can use at scientific research specialties of solid mechanics, hydroclasticity and mathematical physics.

At present time in world scales a great importance is paid to the providing the increase of capacity of machines and equipments, which are being used for processing the agricultural production, lowering of power consumption, the safety of manufactured products.
Since achieving the Independence of the Republic with the purpose of providing the necessity of population in grain today in comparison with 1991 arc grown 10 times more grain ( in 2015 more 8 mln. tons), 5 times more bean (string bean, mash, green peas, local peas, soya ...). Due to that storage, primary processing, take off and processing separation on fractions, manufacture, increase of stores, export of food production and reinforcement foreign currency reserves of the country arc actual.
Being used in processing of grain equipment, their work routine and technologies do not fully suit to chemical, physical and mechanical properties, humidity of being grown grain in our republic. Especially for that reason a great importance has the study of physical-mcchanical properties of local sorts of grain in cutting regions, manufacture, testing and implementation of metal and power saving, compact, completing several technological processes of machines of new series, which are necessary for purification from different organic, mineral and large impurities and fractionation of grain on mass taking into account its essentials.
Working out on mathematical model and the calculation method of grain movement on machine cell for separation and fractionation on mass allow determining the kincmatical and constructive parameters of main working organs.
The formation of equation on grain movement by inclined, perforated shelves and lower inclined, shaken shelves for purification from light and large impurities and determination on its base constructive parameters inclined, perforated and lower shaken shelves arc the basic of grain movement mixture on the surface of shelves gravity flow by one layer, at that purification from cleaving organic and mineral impurities and grain shells arc provided. Mathematical modeling creates new directions for determination of modeling diameters of higher and lower shaken shelves, geometrical parameters of aspirational channels, the speed of air flow and absorption of light impurities from the staff of grain mixture from the surface of perforated shelves through aspirational channels, technological processes of separation to individual cubic content of large impurities and equable fetching of grain in feeding the roll of cell.
The given dissertation research in certain degree serves the completing tasks, defined in degrees of the President of the Republic of Uzbekistan №PD-1072 «On program measures of important projects realization on modernization, technical and technological upgrading of production for 2009-2014 years» from March 12, 2009y and №PD-1633 «On measures of further improvement of management organization and development of food production of the Republic for 2012-2015 years» from October 31, 2011 and also other normative-legal acts concerning the given activity.
The aim of the research is based on scientific evidence of kincmatical and constructive parameters of machines for separation and fractionation of grain crops, working out the constructive and technical documentations on the creation of machines.
Scientific novelty of the research includes the followings:
In cutting territories physical-mechanical properties of local sorts of grain were studied;
the interacted essentials parameters of processes for separation and fractionation of grain crops were defined;
the mathematical model and completed equation of grain motion on the surface of perforated shelves taking into account airflow was developed;
the speed of airflow and was chosen ventilator for purification of grain from light impurities in scparational cell was defined;
the mathematical model and completed equation of grain motion on the surface of lower shaken shelves for purification from large impurities in scparational cell taking into account airflow was developed;
the mathematical model and completed equation of grain motion on the surface of feeding roll of fractional cell taking into account the ressisstancc of air to the surface of grain on lateral cutting was developed;
kincmatical and technological parameters of combined separator taking into account physical-mechanical essentials of local sorts of grain were defined; the combined separator for purification from other impurities and fractionation of grain crops on mass with manufacture 7,5 t/h, properly sizes: -l=4500mm, h=2000mm, b=500mm was created.
CONCLUSION
1. New design of machines for separation and fractionation of grain crops, which combined cell separation and fractionation of grain, allowing to increase the performance of the machine and the quality of cleaning of the grain mixture from impurities and fractionation grain for the masses to exclude his injury, reduce material and energy consumption, as well as, to take a relatively small production area was worked out.
2. The mathematical model and method of calculation of the movement of the grain mixture in the chambers of the machine for separation and fractionation of the grain mass to determine the value of kinematic and geometric parameters of the main working bodies were worked out.
3. The design parameters of the inclined perforated shelves and lower shelves shaking on the basis of the equations of motion of the grain along the surfaces of inclined perforated shaking shelves and bottom shelves for cleaning grain from light impurities and large mixtures were revealed.
4. Rational parameters of inclined perforated and lower shaking shelves with a capacity of 7,5 t/h: the width of inclined shelves is 500 mm; the length of the inclined shelf is 400 mm; the angle of slope of the shelf is a - 23°; length of the lower sloping shelves - 430 mm, which allowed the movement of the grain mixture along the surfaces of the shelves by gravity with one layer, that provided separating of organic and mineral matter and shells of the grain.
5.It was established that on the basis of developed methods of mathematical modeling and experimental studies of dimensions, the perforations of perforated shelf for slant - 4 mm, lower shelf for shaking 7 mm, the width of the ducts of the aspiration channel 20 mm, height 1500 mm, air flow velocity of 7 m/s, which provided the absorption of light impurities, through the perforations and the suction channels, the separation of large impurities in a separate container and even loading the corn into the chamber of the supply roller.
6. Design parameters of the feeding roller depending on the process requirements and machine performance on the basis of mathematical modeling, which was a diameter of 350 mm, a width of 500 mm and speed 450 r/m, ensuring a smooth takeover of the grain and uniformly the same initial speed of its flight (l> = 6,28^/) were defined.
7. Differential equations, to determine the total height «h» and length of flight of a grain «L», depending on the initial speed of flight of grain from the feed roller , the angle of inclination of the guide tray , the drag coefficient of the air from the grain mass , and the characteristics of local varieties of grain.
8. It was found ,that when the angle of inclination of the guide tray a = 45° depending on weight of grain, the height of its flight ranges from 0,2 to 1 m, and the length of flight of a grain «L» ranges from 1,5 to 4 m. These options allow you to divide grain into several fractions according to the mass to reduce its moisture content from 2% to 3%, and fully clean grain from various impurities.
9. Physical -mechanical properties of local varieties of grain in regions of the country, which allow us scientifically substantiate the parameters of the new machines, created the separation and fractionation of the grain excluding the injury of local varieties of grain.
10. On the basis of the results of research, it was manufactured and introduced into the production a new design of machine for the separation and fractionation of crops with scientifically based options were developed. The implementation of which in manufacture have improved the performance of the machine.

Actuality and claimed of theme of dissertation. Development of the Infrastructure of the world and the requirements for resistance to without danger and erected constructions putting new challenges increase the strength and reliability of the bearing structural elements. One of the most urgent and fundamental problems of mechanics is to develop Refine numerical calculation method for predicting the strength and stability of structures in their design. In fundamental research and development to ensure the safe operation of buildings and structures allocated 4-5% of the total costs of research and education, including Europe and the CIS 3-4% in industrialized countries 7-8%.
In the conditions of the economic reforms which are carried out in our country special attention it is paid to safe operation and durability of the built designs and constructions. In particular, for ensuring safe flight flying and spacecrafts, stability and seismic stability of elevated and underground constructions, and also durability of the bearing elements of devices of drilling in geological exploration works, the solution of tasks of calculation of durability of their constituent elements like plates and flat covers is of particular importance.
With development of modem technologies, creations of constructional materials with unique physicomcchanical properties, become actual questions of development of nonclassical theories and methods of calculation of rigidity, durability and stability of plates and covers. Enhancement of theories of a bend and development of numerical methods of calculation of durability of the difficult bearing elements of designs, using modem information technologies has important scientific and practical value.
This dissertation research to a certain extent is the task of development and introduction of modem computerization and information and communication technologies, science and educational process of higher educational institutions of advanced learning systems, based on the acquisition and active use of modem computer technology in the development of numerical methods for solving problems of mechanics provided in Presidential decree number PF 3080 of 30 May 2002 "on further development of computerization and introduction of information and communication technologies" and the resolution of the Cabinet of Ministry of Construction. The Republic of Uzbekistan № 200 of 6 June 2002 "On measures for further development of computerization and introduction of information and communication technologies"
Purpose of the research arc solutions of no classical problems for plates and shallow shells; development of numerical resolution of differential approach problems in spectral problems for the stability of structures.
The scientific novelty of the research it is as follows:
developed numerical approach permits differential sample-Lcmc in spectral problems for self-adjoint operators;
Developed an improved method of differential and variational sweep iterations for solving static and dynamic problems of mechanics;
methods have been developed to address emerging danger zones to internal stresses in the complex areas of deformation of bearing structural elements;
develo Ihods for halving the resonance amplitudes using dynamic dampers in p rly high-rise buildings
The critical skorasti to flutter in aerodynamics, which may differ in the order in accordance with the terms Fastcn-tion plates.
CONCLUSION
On the basis of studies on a doctoral dissertation on the topic of "non-classical tasks of plates and shallow shells and methods of their numerical solutions" presents the following conclusions:
1. The construction of non-classical theories of plates and shallow shells without hypotheses based on the three-dimensional equations of motion of nonlinear elasticity theory in non-canonical regions of deformation, confirming its effectiveness by comparison with the known theories is of particular importance in solving applied mechanics problems.
2. The modification of the method of differential driving the development of numerical approaches to the resolution of differential problems in spectral problems for self-adjoint and non- operators, the justification of the reliability of numerical methods increases the effectiveness of solving problems in applied mechanics.
3. The obtained results of solving the three-dimensional problem of Rcnovo-these thick hinge-plate secured under the action of a sinusoidal load confirms the extension of the limits of applicability to non-classical theories of plates.
4. The stress-strain state of plates under action of concentrated force located at an arbitrary point in the front plane at a different aspect ratio and thickness. For the first time calculated the values of the emerging longitudinal force, under the action of transverse loads.
5. The dynamic effect of suddenly applied concentrated forces moving on a thick plate. Identified areas of longitudinal compression and extension when exposed to moving concentrated forces. For the first time investigated the distribution of the stationary longitudinal waves at a sudden impact piecewise constant transverse loads on the thin rods and plates.On the basis of the survey on his doctoral dissertation on the topic "Non-classical problems of plates and shallow shells and numerical methods for their solution" presented the following conclusions:
6. The tasks considered in the light of the longitudinal force of its own weight leads to a twofold increase in the resonant amplitudes of steady oscillations in sobolyata structures. Change the fixing conditions for a reason especially highrise buildings leads to the appearance of new resonance regions. Based on the conducted research on the selection of optimal parameters of dynamic vibration absorbers and their location, the facilities, like TV towers, achieved a reduction of the resonance amplitude is almost two times. We carried out a theoretical study with application of modem information technology, for engineers and designers provide a reliable tool for the daily control of safety of high-rise buildings.
7. The numerical solution of two-dimensional spectral problems under various conditions of fixation plates under dynamic loads. The values of the critical speeds of the streamlined gas in the study of flutter in the plates at different ratios of physical and geometrical parameters. The critical speed depending on the conditions of fastening can vary considerably. Studied flutter in the plates at various angles of attack streamlined air. If you change the critical angle of attack can vary up to three times.
8. With the help of isoperimctric coordinate system in non-classical fields determined by the values of the eigenvalues and plots of basic functions for standing waves under different conditions of fixation, non-canonical plates.

The aim of the research work is development of technology for the production of carbide roll with the use of refractory metal powders.
Scientific novelty of the research work. The scientific novelty of the research is as follows:
the advanced technology of manufacturing of a hard-alloy roller of an input box of a stand is developed by a method of powder metallurgy;
the technology of obtaining a hard-alloy forming tool with an optimal combination of strength and plasticity has been developed;
the optimum composition of 60% TiC, 20% Ni, 4% W, 4% Fe molybdenum new alloy of the Mo-TiC-Ni-W-Fe system was developed to impart strength and ductility to the rollers;
the composition of 39% Mo, 42% TiC, 12% Ni, 4% W, 4% Fc of the Mo-TiC alloy was developed to provide the wear resistance of the rollers.

The aim of the research work is to develop the methods for estimating seismic stress of underground polymer pipelines with variable coefficients of interaction located in structurally heterogeneous soils.
Scientific novelty of the research work consists in the following: criteria for differentiated evaluation of seismic and explosive effects on pipeline systems, classification and prediction of the damage of underground polymer pipelines under seismic influences are developed; variable coefficient of interaction along the axis of the pipeline is determined taking into account the moisture content of soil; technique for calculating stress-strain state of underground polymer pipelines with account of variable coefficient of interaction is developed; a technique for calculating the stress-strain state of underground polymer pipelines for an arbitrary direction of seismic loads is developed.