Application of finite difference method for solving problem of seismic resistance of underground pipelines

The paper analyzes the dynamic response of an underground main pipe under action a longitudinal wave propagating in soil along pipe. article assumes that elastic is finite length, and linear viscoelastic model “pipe-soil” system interaction considered. problem solved numerically using explicit scheme difference method. A taken as traveling sine wave. presents comparative analysis results for certain values viscous coefficients, propagation velocity, pulse duration. Under system, reflection pipeline at boundaries coincides with soil, leading to increase maximum deformation pipeline, value which can double. viscosity coefficient contact leads attenuation wavefront pipeline. For soils more than 100 kN·s/m 2 , this may lead complete bursts choice step ratio coordinate time equal velocity allows obtaining coincide exact solution.