轨道式电磁发射装置外加固层的力学分析  

Mechanical analysis for outer package electromagnetic rail launcher

作　　者：姜远志[1] 鲁军勇[1] 吴海 张永胜[1] 蔡喜元 JIANG Yuan-zhi;LU Jun-yong;WU Hai;ZHANG Yong-sheng;CAI Xi-yuan(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室

出　　处：《海军工程大学学报》2019年第6期34-39,共6页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51522706,51407191,51307176,51607187);国家973计划资助项目(613262)

摘　　要：轨道式电磁发射装置工作时,通常利用外加固层平衡导轨间的电磁斥力保证内膛尺寸的稳定性,但制作外加固层时采用的纤维缠绕工艺复杂,导致其应力特征难以准确计算。为此,首先根据弹性力学相关理论,考虑缠绕过程中的松弛效应,推导了外加固层成型后残余环向应力、垂向预紧力及其相对应的轨道临界斥力的解析表达式;然后,在有限元软件中采用等效温度场法、逐层实化法并结合重启动技术,准确模拟了缠绕过程;最后,对比两种方法得到的外加固层内残余环向应力分布情况,证明了解析计算结果的正确性,并得到外加固层的厚度、缠绕张力对成型后内应力的影响,为纤维缠绕型轨道式电磁发射装置的快速设计提供参考。When the electromagnetic rail launcher is working, the outer filament wound package is needed to offset the electromagnetic repulsive force between the rails, so as to ensure the relative stability of the bore. However, the forming process of filament wound package is too complex for accurate stress calculation. Based on the elasticity mechanics theory and considering the effect of relaxation in the filament winding process, the analytic expression of the residual cyclic stress, vertical preload and critical rail-repulsion are deduced firstly. And then, in finite element software, by equivalent temperature field method and selecting layer by layer, combined with restart technique, the winding process is simulated to get the residual cyclic stress in the package and validate the analytic results. Finally, the influence of the thickness and wound tension of the package on its stress is obtained, which provides a reference for the efficient design of the filament wound electromagnetic rail launcher.

关 键 词：电磁发射 纤维缠绕 复合材料 有限元 

分 类 号：TM359[电气工程—电机]