【摘要】 采用ANSYS/LS-DYNA有限元分析软件,对集团药包的土中爆炸作用进行了数值模拟,研究了爆炸作用下土介质的动力响应、爆腔的形成和发展规律及土中爆炸波的传播规律。结果表明:炸药爆炸后在土中留下一个充满爆炸气体的空腔(爆腔),爆腔半径约为炸药原半径的7倍,当爆炸波波阵面到达测定单元时,压力瞬间达到峰值,然后随着时间的增长逐渐降低,趋于平缓,且随着折合距离的增大,峰值压力不断减小;数值模拟的结果与理论计算结果吻合较好。更多还原

【Abstract】 A numerical simulation of explosion process with concentrated charge in soil was carried out by using finite element analysis software ANSYS/LS-DYNA.The dynamic response of soil medium,the formation and development law of explosion cavity and the explosion wave propagation law in soil were investigated.The results indicate that the radius of explosion cavity is about seven times original radius of concentrated charge.When the wave-amplitude face of explosion wave gets to the testing elements,pressure at that position increases to a peak value of overpressure instantly and then gradually decreases with time.The peak pressure falls obviously with increasing of scale distance.The numerical simulation results agree well with the theoretical calculation results.更多还原