用于爆炸流场与结构间相互作用分析的Euler-Lagrange耦合模拟技术

摘要

介绍了1种把Eulerian计算过程和Lagrangian计算过程耦合起来的数值技术,编写了计算程序,把爆炸流场作用过程和结构动力学响应过程的计算结合起来,实现了爆炸流场对结构加载和结构动力响应 及对爆炸流场反作用过程的模拟.利用Eulerian过程的流体弹塑性有限差分计算程序MMIC(multi-materials in cell)模拟爆炸流场发展过程,利用Lagrangian过程的结构动力学有限元计算程序模拟结构响应.应用Euler-Lagrange耦合技术分析了爆炸作用下飞片的变形、破坏和对靶体的侵彻过程,计算结果表明,本文的方法可以较好地反映流场与结构各自的运动发展及相互间作用过程.%To describe the interaction of the explosion field and the structure, a 2-D Euler-Lagrange coupling method was developed to couple a Eulerian code and a Lagrangian code. The Eulerian finite differential code called MMIC(multi-materials in cell) was used to simulate the behavior of the explosion field. And the dynamic finite element code was used to calculate the response of structures. The Euler-Lagrange coupling method was used to simulate the process of deformation and penetration of an explosion-drived fragment. The numerical results indicats that this method has the ability of simulating the problem of explosion-structures interation.