摘要
采用有限元软件AutoDyn,对TNT炸药起爆后爆炸冲击波遇到挡墙时的传播规律进行了三维数值模拟,分析了冲击波遇到挡墙时的反射高压及冲击波的环流汇聚作用。结果表明:冲击波遇到挡墙时将会产生反射高压;在比距离较小时,挡墙迎爆面的最大压力发生在挡墙底部;而随着比距离的增大,压力分布将沿挡墙高度趋于均匀。由于反射的作用,在挡墙前的地面上将会出现高压;当冲击波绕过挡墙时,在冲击波三个方向的绕射汇聚作用下,将会在墙后面一定区域内突然产生局部高压,并且随着传播的继续,这个区域不断的扩大,最后再次形成球面波传播。
After the explosion of TNT,this paper tries to have three-dimensional numerical value analysis on the propagating regulation of explosion blast wave facing the retailing wall,using the limited element software AutoDyn.The paper analyzes the reflecting high pressure of blast wave facing the retailing wall and circulation convergent effect of blast wave.The result shows： the blast wave will produce reflecting high pressure when facing with the retailing wall,and when the retailing wall is rigid body,the pressure will be larger than the plasmodium;because of the reflect,there will have high pressure on the floor in front of the retailing wall;when the blast wave bypasses the retailing wall,under the diffraction convergent effect of the blast wave in three direction,there will have partial high pressure in certain region behind the wall,and with the continuing of the propagation,the region will gradually expand and at last forming the propagation of spherical surface wave.
出处
《福建师大福清分校学报》
2011年第5期26-29,47,共5页
Journal of Fuqing Branch of Fujian Normal University
关键词
地面爆炸
冲击波
挡墙
ALE方法
ground explosion
blast wave
retailing wall
ALE method
