Seismodynamics of underground pipelines with complex conditions of interaction with soi

The aim of the research work is the development of a technique for calculating the seismodynamics of underground pipelines with complex conditions of interaction with soil.
Scientific novelty of the research work consists in the following: solution techniques for wide application of approximate numerical methods to the problems of seismodynamics of underground pipelines are improved; a technique for calculating stress-strain state (SSS) of underground pipelines under longitudinal oscillations is developed, it takes into account the linear and nonlinear interactions in “pipe-soil” system; a technique for calculating stress-strain state of complex systems of underground pipelines under the influence of seismic loads with distributed masses is developed; a technique for calculating stress-strain state for pipeline systems of orthogonal and non-orthogonal configurations is developed for an arbitrary direction of seismic loads.