高g值冲击下薄壁管抗冲击性能研究  

Impact Resistance Performance of Thin-walled Tube under High g Impact

作　　者：李耀宙 张冰冰 薛仲卿 范志强[2] LI Yaozhou;ZHANG Bingbing;XUE Zhongqing;FAN Zhiqiang(Taiyuan Institute of Technology,Taiyuan 030008,China;North University of China,Taiyuan 030051,China)

机构地区：[1]太原工业学院,太原030008 [2]中北大学,太原030051

出　　处：《包装工程》2024年第19期58-64,共7页Packaging Engineering

基　　金：国家自然科学基金(12072326);山西省科技厅基础研究计划自由探索类青年项目(202203021222281);山西省高等学校科技创新项目(2023L341);太原工业学院引进人才科研资助项目(2023KJ043)。

摘　　要：目的在弹箭发射与侵彻时,弹箭系统内部测试电路元件承受高g值加载。为提高电路元件的存活度,需对其进行缓冲防护。方法利用气炮装置发射钢弹,撞击底座获得高g值加载,研究铝合金薄壁管的抗冲击特性,并基于LS-DYNA研究薄壁管壁厚和冲击速度对高g值冲击过程的影响。结果钢弹冲击速度增加,底座的激励加速度幅值(Acceleration Amplitude of Excitation,AAE)逐渐增加,单层管(CirT)和多胞管(MT)的缓冲效率分别达到91.0%和74.7%,数值模拟所得AAE和响应加速度幅值(Acceleration Amplitude of Response,AAR)与实验结果误差<5%,薄壁管壁厚对激励加速度几乎无影响。结论本文所得结果对轻质元件的高g值冲击防护有较强的指导意义。During missile launch and penetration,the internal testing circuit components of the missile system are subject to high g overload.The work aims to apply buffer protection to the circuit components to improve the survival of the circuit components.The air gun device was used to launch steel bullets to impact the base under high g loading,so as to study the impact resistance characteristics of aluminum alloy thin-walled tubes.Based on LS-DYNA,the effect of thin-walled tube wall thickness and impact velocity on the high g impact was studied.As the impact velocity of the steel ball increased,the acceleration amplitude of excitation(AAE)at the base gradually increased.The buffering efficiency of single-layer tubes(CirT)and multi cell tubes(MT)reached 91.0%and 74.7%,respectively.The error between the acceleration amplitude of excitation and the acceleration amplitude of response(AAR)obtained from numerical simulation and experimental results was not more than 5%,and the wall thickness of thin-walled tubes had almost no effect on the excitation acceleration.The results obtained in this article have strong guiding significance for the high g impact protection of lightweight components.

关 键 词：高g值加载 薄壁管 抗冲击 缓冲效率 

分 类 号：TB482.2[一般工业技术—包装工程]