空爆荷载下爆源设置方式对圆柱壳动力响应的影响

基于动力有限元程序LS-DYNA及Euler-Lagrange耦合方法，分别以75g柱状和200g块状TNT炸药为爆源，对圆柱壳在爆炸载荷作用下的非线性动态响应过程进行三维数值模拟，描述了圆柱壳在不同爆源设置方式下的动力响应。数值模拟结果表明：壳壁破坏特征与药量Q、爆源设置方式密切相关，75g柱状TNT炸药轴线与圆柱壳轴线垂直设置时破坏作用大，而200g块状TNT炸药长边中心线与圆柱壳轴线平行设置时破坏作用则更强。研究结果为在役油气管道的抗爆能力分析和安全性评估提供了重要的参考依据。

Influence of Setting ways of explosion source on Dynamic Response of Cylindrical Shell Subjected to Air Explosion

By means of an explicit nonlinear dynamic finite element computer code LS-DYNA，regarding 75g column and 200g bulk TNT as explosion resource respectively，the nonlinear dynamic response process of the cylindrical shell subjected to explosion laterally were numerically simulated with Euler-Lagrange coupling method，the dynamic responses of setting different ways of explosion source were described. Numerical simulation results show that failure characteristics of shell wall were close connection with charge Q and setting ways of explosion source，setting vertical way of explosion with 75g column TNT source had fierce failure effect and setting parallel way of explosion with central line of 200g bulk TNT long side had the same result. The results provide important reference for the blast-resistant properties analysis and safety assessment of oil-gas pipes safety.