Dynamic transfer model and applications of a penetrating projectile‐fuze multibody system  

作　　者：Da Yu Benqiang Yang Kai Yan Changsheng Li Xiang Ma Xiangyu Han He Zhang Keren Dai 

机构地区：[1]ZNDY of Ministerial Key Laboratory,School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,China [2]Center of Ultra‐Precision Optoelectronic Instrument Engineering,Harbin Institute of Technology,Harbin,China

出　　处：《International Journal of Mechanical System Dynamics》2023年第4期360-372,共13页国际机械系统动力学学报（英文）

基　　金：Key Basic Research Projects of Basic Strengthening Plan of China,Grant/Award Number:2021-JCJQ-JJ-0597;National Natural Science Foundation of China,Grant/Award Number:52007084;Postgraduate Research Practice Innovation Program of Jiangsu Province,Grant/Award Number:KYCX23_0518。

摘　　要：In modern warfare,fortifications are being placed deeper underground and with increased mechanical strength,placing higher demands on the target speed of the penetrating munitions that attack them.In such practical scenarios,penetrating fuze inevitably experience extreme mechanical loads with long pulse durations and high shock strengths.Experimental results indicate that their shock accelerations can even exceed those of the projectile by several times.However,due to the unclear understanding of the dynamic transfer mechanism of the penetrating fuze system under such extreme mechanical conditions,there is still a lack of effective methods to accurately estimate and design protection against the impact loads on the penetrating fuze.This paper focuses on the dynamic response of penetrating munitions and fuzes under high impact,establishing a nonlinear dynamic transfer model for penetrating fuze systems,which can calculate the sensor overload signal of the fuze location.The results show that the relative error between the peak acceleration obtained by the proposed multibody dynamic transfer model and that obtained by experimental tests is only 15.7%,which is much lower than the 26.4%error between finite element simulations and experimental tests.The computational burden of the proposed method mainly lies in the parameter calibration process,which needs to be performed only once for a specific projectile‐fuze system.Once calibrated,the model can rapidly conduct parameter scanning simulations for the projectile mass,target plate strength,and impact velocity with an extremely low computational cost to obtain the response characteristics of the projectile‐fuze system under various operating conditions.This greatly facilitates the practical engineering design of penetrating ammunition fuze.

关 键 词：projectile‐fuze dynamic transfer model impact finite element 

分 类 号：TJ4[兵器科学与技术—火炮、自动武器与弹药工程]