关键词: 爆炸, 地冲击, 埋地输气管道, 数值模拟, ALE算法

Abstract: In this paper，by using non-linear dynamical theory and Arbitrary Lagrange-Eulerian(ALE) algorithm in LS-DYNA 3D finite element program and selecting proper material constitutive relations，a method of numerical simulation is used to study dynamical response of buried gas pipeline under ground shock wave of underground explosion.By numerical calculation and mathematical analysis of buried gas pipeline in 10 load cases of two data groups，the relationship between dynamical maximal responses of buried gas pipeline and the mass of detonator or the distance between the center of pipeline and the detonator including velocity and dynamical stress is fitted respectively.The simulation results agree with the regularity of empirical equation，which shows that it is feasible for the numerical simulation method in this paper to study dynamical response of buried pipelines under ground shock waves from explosion.The method of numerical simulation in this paper provided a calculation platform for the risk evaluation of buried gas pipelines during third-party damage and the conclusion in this paper may provides significant reference for the risk evaluation and disaster prevention of buried gas pipeline.

Key words: explosion, ground shock, buried gas pipeline, numerical simulation, ALE algorithm