水下爆炸冲击波在圆柱壳结构表面绕射衰减分布  

Diffraction Attenuation Distribution of Underwater Explosion Shock Waves on the Surface of a Cylindrical Structure

作　　者：张迪洲 何镇宏 何心怡 李营 卢军 陈双 ZHANG Di-zhou;HE Zhen-hong;HE Xin-yi;LI Ying;LU Jun;CHEN Shuang(Naval Research Institute,Beijing 100161;State Key Laboratory of Explosion Science and Technology,Beijing University of Technology,Beijing 100081)

机构地区：[1]海军研究院,北京100161 [2]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：《水下无人系统学报》2022年第3期371-377,共7页Journal of Unmanned Undersea Systems

摘　　要：水下爆炸冲击波作用于圆柱壳表面时,除反射冲击波外,在背爆面还会形成绕射冲击波。为了研究冲击波压力在圆柱壳表面的绕射分布特性,采用ABAQUS软件的耦合欧拉-拉格朗日方法对水下爆炸冲击波与圆柱壳结构的相互作用进行了数值仿真,得到了圆柱壳周围的压力场分布情况,分析了不同爆距和药量对绕射冲击波衰减的影响。研究结果表明:冲击波压力峰值和冲量在迎爆面区域急速衰减,随着爆距的减小,衰减到50%的角度变小,衰减速度明显变快,而药量对冲击波压力峰值和冲量衰减影响都很小。When an underwater explosion shock wave acts on the surface of a cylindrical shell,a shock wave forms on the backshock surface in addition to the reflected shock wave.To study the diffraction distribution features of shock wave pressure on the surface of a cylindrical shell,the coupled Eulerian-Lagrangian method in the ABAQUS soft ware is used to simulate the interactions of underwater explosion shock waves and cylindrical shell structures.The pressure field distribution around a cylindrical shell is obtained.The influence of different blast distances and charges of TNT on the diffraction effect of shock wave attenuation is analyzed.The results indicate that the peak pressure and impulse of shock waves decay rapidly in front of the blast surface.With a decrease in blast distance,the angle required for attenuation to 50%decreases and the attenuation speed increases significantly.However,the charge of TNT has little effect on the peak pressure and impulse attenuation of shock waves.

关 键 词：水下爆炸 圆柱壳 冲击波 绕射压力衰减 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程] U661.44[交通运输工程—船舶及航道工程]