封闭空间内爆炸冲击波超压计算模型及分布特性研究  

Calculation Model and the Distribution of Wave Pressure under Internal Explosion in Closed Space

作　　者：柏小娜 李向东[1] 杨亚东[1] 

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,江苏南京210094

出　　处：《爆破器材》2015年第3期22-26,共5页Explosive Materials

基　　金：国家自然科学基金(51278250)

摘　　要：建立了封闭空间内爆炸的冲击波超压计算模型,将冲击波在不同壁面的反射冲击波等效为不同位置镜像爆源产生的入射冲击波,密闭空间内冲击波传播和作用过程等效为爆源与镜像爆源形成冲击波相互叠加的过程,基于LAMB规则,将所有爆源和镜像爆源的冲击波叠加,从而得到封闭空间内任意位置处的超压,并进行了结构内爆炸试验。研究结果表明,装药在封闭空间内爆炸超压呈现多峰性,典型位置处的计算超压时程曲线与试验超压时程曲线符合较好,峰值超压的计算误差小于10.78%,所建模型正确,能够用于内爆炸载荷的快速计算。A calculation model of the explosive shock wave in closed space was set up. The shock waves reflected by different wall surfaces were equivalent to the incident shock waves generated by the mirror explosion sources at different positions. The propagation and reaction process of shock waves in closed space could be equivalent to the process that the shock waves generated by the explosion source and its mirror image sources were superimposed. Based on the LAMB rules,the shock waves of all explosive source and the mirror sources would be superimposed to obtain the overpressure at an arbitrary position in the closed space. Moreover,internal explosion experiments were conducted. The results indicate that the overpressure exhibits multiple peaks. The calculation overpressure history curves at the typical positions are in good agreement with the experimental ones. The calculation error of overpressure is less than 10. 78%. Therefore,the model is correct and could quickly calculate the blast loads under internal explosion.

关 键 词：爆炸力学 内爆炸 冲击波超压 计算模型 镜像爆源 

分 类 号：O383.2[理学—流体力学] TJ510.6[理学—力学]