以大口径管道为研究对象,利用非线性动力分析有限元程序ANSYS/LS-DYNA,适当选取材料的本构关系,很好地模拟了管道在爆炸荷载作用下管道的破坏变形情况,分析了炸药药量、爆心距、管道壁厚等因素对管道破坏作用的影响。结果表明,采用数值模拟方法对研究爆炸荷载下管道破坏作用的影响因素是可行的,其模拟结果对管道防护具有一定的参考价值。 Taking the large-diameter pipe as the research object, the finite element program ANSYS / LS-DYNA of nonlinear dynamic analysis was used to select the constitutive relation of the material properly and well to simulate the pipe’s deforming deformation under the explosion load. The influence of the factors such as dosage, burst distance, pipe wall thickness on the pipeline destructive effect. The results show that it is feasible to use numerical simulation method to study the influence factors of pipeline under blast load. The simulation results have certain reference value for pipeline protection.