PELE侵彻金属靶破碎效应的相似分析  

Similar Analysis of PELE Penetrating Metal Target Fragmentation Effect

作　　者：徐立志[1,2] 韩志远 周峰 胖世铭[1] 杜忠华 高光发[1] XU Lizhi;HAN Zhiyuan;ZHOU Feng;PANG Shiming;DU Zhonghua;GAO Guangfa(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;Key Laboratory of Impact and Safety Engineering,Ministry of Education,Ningbo University,Ningbo 315211,Zhejiang,China;Beijing Institute of Space Long March Vehicle,Beijing 100076,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]宁波大学冲击与安全工程教育部重点实验室,浙江宁波315211 [3]北京航天长征飞行器研究所,北京100076

出　　处：《高压物理学报》2023年第1期139-148,共10页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(12202207,12172179,12102201);江苏省自然科学基金(BK20220968);国家博士后基金(2022M711623);宁波大学冲击与安全工程教育部重点实验室开放基金(CJ202201)。

摘　　要：为了研究横向效应增强型侵彻体(penetrator with enhanced lateral effects,PELE)侵彻金属靶板破碎效应的相似规律,选取PELE的壳体破碎长度和靶后破片散布半径作为衡量PELE破碎效应的两个物理参量,基于量纲理论对PELE破碎效应问题进行相似分析,应用AUTODYN软件开展了4组相似模型数值模拟,并进行了两组相似模型验证试验。研究结果表明:通过相似理论分析,确定了PELE破碎效应满足严格的几何相似律。在800~2000 m/s撞击速度范围内,归一化处理的壳体破碎长度和靶后破片散布半径数值模拟结果及试验结果与几何尺寸无关,仅随撞击速度的提升呈线性增长,从而证明了PELE侵彻金属靶的破碎效应满足几何相似律。To study similar law of the fragmentation effect of penetrator with enhanced lateral effects(PELE)penetrating a metal target plate,breaking length of the PELE jacket and scattering radius of the fragments behind target are selected as two physical parameters to measure the fragmentation effect of PELE.A similar analysis on the fragmentation effect of PELE was conducted based on dimensional theory.Four groups of scaling model simulations were carried out using AUTODYN software,and two groups of scaling model verification tests were done.It is determined that the fragmentation effect of PELE satisfies geometric similar law through the similar theory analysis,and in the range of 800–2000 m/s impact velocity,the normalized breaking length of jacket and dispersion radius of fragments both increase linearly with the impact velocity in the simulation and test results,which proves that the fragmentation effect of PELE penetrating the metal target satisfies the geometric similarity law.

关 键 词：横向效应增强型侵彻体 侵彻 破碎效应 量纲分析 相似律 

分 类 号：O383[理学—流体力学]