Debris cloud structure and hazardous fragments distribution under hypervelocity yaw impact  

作　　者：Chenyang Wu Qi-Guang He Xiaowei Chen Chunbo Zhang Zebin Shen 

机构地区：[1]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Haidian District,Beijing,100081,China [2]School of Mechatronical Engineering,Beijing Institute of Technology,Haidian District,Beijing,100081,China [3]Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang,Sichuan,621999,China

出　　处：《Defence Technology（防务技术）》2023年第9期169-183,共15页Defence Technology

基　　金：supported by the National Natural Science Foundation of China(Grant No.11872118,11627901)。

摘　　要：This study investigates how the debris cloud structure and hazardous fragment distribution vary with attack angle by simulating a circular cylinder projectile hypervelocity impinging on a thin plate using the finite element-smoothed particle hydrodynamics(FE-SPH)adaptive method.Based on the comparison and analysis of the experimental and simulation results,the FE-SPH adaptive method was applied to address the hypervelocity yaw impact problem,and the variation law of the debris cloud structure with the attack angle was obtained.The screening criterion of the hazardous fragment at yaw impact is given by analyzing the debris formation obtained by the FE-SPH adaptive method,and the distribution characteristics of hazardous fragments and their relationship with the attack angle are given.Moreover,the velocity space was used to evaluate the distribution range and damage capability of asymmetric hazardous fragments.The maximum velocity angle was extended from fully symmetrical working conditions to asymmetrical cases to describe the asymmetrical debris cloud distribution range.In this range,the energy density was calculated to quantitatively analyze how much damage hazardous fragments inflict on the rear plate.The results showed that the number of hazardous fragments generated by the case near the 35°attack angle was the largest,the distribution range was the smallest,and the energy density was the largest.These results suggest that in this case,debris cloud generated by the impact had the strongest damage to the rear plate.

关 键 词：Debris cloud Hypervelocity yaw impact FE-SPH adaptive method Velocity space Hazardous fragments distribution 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程] V528