多相介质爆炸冲击响应物质点法数值模拟  

Simulation of explosion and shock involving multiple materials based on the material point method

作　　者：王宇新[1] 陈震 孙明[1] 

机构地区：[1]大连理工大学工业装备与结构分析国家重点实验室,辽宁大连116024 [2]Department of Civil and Environmental Engineering,University of Missouri,Columbia MO 65211-2200,USA

出　　处：《爆炸与冲击》2008年第2期154-160,共7页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10402006)

摘　　要：为了解决当炸弹在近场爆炸时爆轰波驱动破碎的弹片共同作用于混凝土墙壁的过程中所涉及的多物理场计算和多相介质耦合分析等问题,利用物质点法(material point method,MPM)不需要考虑物质间的分界面、耦合条件自动满足等特点,应用无网格MPM法对两种类型的炸弹(带金属外壳和不带金属壳)产生的爆炸场、弹片破碎和混凝土墙壁的破坏进行数值模拟。数值结果表明,无网格MPM法是计算多相介质爆炸效应的一种有效的算法。The meshless material point method （MPM） is introduced to solve the problems that when a bomb is exploded near the building, an analysis on the combining effects of blast wave and fragments on the concrete wall involves the multi-physics field calculations and multi-material coupling. The explosion field, bomb fragments and deformation and fracture of the concrete wall resulted from explosion of bombs with and without a metal case are numerically simulated by using the characteristics of the MPM that a moving boundary or material interface can be easily traced, and the coupling conditions of multiple materials are automatically satisfied. Calculated results show that the meshless MPM is useful for computation of multi-material explosion effect.

关 键 词：爆炸力学 爆炸效应 物质点法 多相介质 无网格法 

分 类 号：O383.2[理学—流体力学]