填充介质圆柱壳在侧向爆炸冲击作用下的变形型面研究  

Investigation on the Deformation Shapes of Cylindrical Shell Filled with Soil under Lateral Explosion Loading

作　　者：李翔宇[1,2,3] 王马法[1] 董文朴 梁民族[1] 

机构地区：[1]国防科技大学理学院,湖南长沙410073 [2]南洋理工大学机械和航空航天工程学院,新加坡639798 [3]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《高压物理学报》2015年第4期299-306,共8页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(11202237;11132012);爆炸科学与技术国家重点实验室开放基金(KFJJ12-16M)

摘　　要：对填充介质圆柱壳在侧向爆炸冲击作用下的变形型面进行了实验研究,获得了圆柱壳的最终变形型面。基于刚塑性动力学中的塑性铰理论建立了相应的分析模型,将圆柱壳划分为多个首尾相连的刚性方杆,利用方杆的平动、转动描述圆柱壳的变形过程,详细推导了相邻方杆间弹簧力、弯矩和偏折角等的表达式,考察了侧向炸药覆盖宽度和圆柱壳初始速度等因素对变形型面的影响。研究结果表明:所建立的分析模型能够有效地预测圆柱壳的变形型面,侧向炸药覆盖宽度和爆轰威力是影响圆柱壳最终变形型面的关键因素,可通过调整侧向炸药的覆盖宽度和圆柱壳初始速度实现不同的圆柱壳变形型面。This paper presents brief results of an experimental investigation on deformation shapes of cylindrical shell filled with soil subjected to lateral explosion loading, and the ultimate deformation shapes are obtained. Based on the experimental results,a corresponding analytical model is undertaken by using the plastic hinge theory. In the analytical model, the cylindrical shell is divided into several end-to-end rigid square bars. The deformation shape of cylindrical shell is described by the translation and rotation process of rigid square bars. The expressions of the spring force, moment and deflection angle between adjacent bars are deduced theoretically in detail. In addition,the blast loading conditions are studied in terms of the covering width of outer layer explosive and the initial velocity of cylindrical shell. Theoretical and experimental results show a good agreement, thus the analytical model can be considered as a valuable tool in understanding the deformation mechanism and predicting the deforma- tion shape of cylindrical shell under lateral contact explosion. The various deformation shapes of cylin- drical shell can be achieved by modifying the covering width of outer layer explosive and initial velocity of cylindrical shell.

关 键 词：圆柱壳 塑性铰 侧向爆炸冲击 变形型面 

分 类 号：O344.3[理学—固体力学]