爆炸冲击波数值计算网格划分方法研究

A Study on the Mesh Generation Method for Numerical Simulation of Blast Wave

在爆炸冲击波数值计算过程中,计算精度很大程度上取决于空气和炸药的有限元网格尺寸.现在常用的爆炸冲击波数值计算网格划分方法大多是针对某一当量炸药的,在使用中存在一定的局限性.针对这一问题,本文提出了一种与炸药当量相关的网格划分方法,并应用有限元软件LS-DYNA进行了计算对比,结果表明:该方法适用性很好,而且在计算精度与计算效率上取得了很好的平衡.

In the process of blast wave numerical simulation,the accuracy of blast wave propagation is strongly dependent on the size of finite element mesh of air and explosive.Nowadays,most of the commonly used methods of blast wave numerical simulation are aiming at one certain equivalent weight,thus,these methods have limitations in application.In order to solve the problem,this paper proposes a mesh generation method taking account of the equivalent weight and conducts amount of calculations by using the finite element software LS-DYNA.The results indicate that this method provides not only better applicability,but also higher accuracy of numerical simulation by concerning computational efficiency.