约束空间爆炸冲击波高精度数值计算及实验验证  

High-resolution hydrocode and validation of explosive shock wave in a confined space

作　　者：徐维铮[1,2] 孔祥韶[1,2] 郑成[1,2] 吴卫国[1,2] 

机构地区：[1]武汉理工大学高性能舰船技术教育部重点实验室,湖北武汉430063 [2]武汉理工大学交通学院,湖北武汉430063

出　　处：《哈尔滨工程大学学报》2017年第7期1151-1161,共11页Journal of Harbin Engineering University

基　　金：国防基础研究项目(B1420133057);国家自然科学基金项目(51409202)

摘　　要：当爆炸发生在约束空间中时,冲击波的传播和演化特性将更加复杂,其对内部结构产生的毁伤破坏效应也更加严重。为了准确评估约束空间内的爆炸载荷,本文提出了改进的五阶WENO有限差分格式,并采用经典算例对其计算精度进行了验证,编写了三维约束空间内柱形TNT爆炸冲击波计算的数值程序。开展了约束空间内柱形TNT爆炸实验,采用本文程序对实验过程进行了数值计算,通过与实验数据的对比验证了数值计算程序的可靠性,在此基础上开展了约束空间爆炸载荷的影响因素研究。结果表明本文程序可快速准确地计算出约束空间内的爆炸载荷,为结构抗爆设计提供可靠的载荷输入。The complex propagation and evolution characteristics of blast waves in a confined space result in serious damage and destruction on the internal structure of a confined space. In order to predict such complicated loads for the reasonable design of structures, we proposed a modified 5th WENO finite difference scheme, which was validated by using classical numerical examples. The modified scheme was implemented in the 3D high-resolution hydrocode developed in the present work to capture the shock waves generated by the cylindrical TNT explosives in a confined space. Experiments were conducted to validate the hydrocode by comparing the numerical results with ex-perimental data. Moreover, we investigated the effects of the size of the venting holes and the relative positions be-tween explosives and venting holes on the characteristics of blast load in a confined space. Results indicated that the proposed 3D hydrocode developed can provide a good prediction of TNT explosion within a confined space. Hence, the high-resolution 3D hydrocode can be used to provide reliable input load when designing explosion-re-sistant structures.

关 键 词：约束空间 数值计算 五阶WENO格式 柱形TNT爆炸 爆炸冲击波 爆炸载荷 

分 类 号：O354.5[理学—流体力学]