摘要
电磁自锁阀广泛应用于卫星、运载火箭、飞船等航天器中,在发动机点火、火工装置爆炸、星箭分离等强冲击环境下,可能发生锁闭失效,影响航天器的安全运行.本文针对冲击载荷作用下电磁自锁阀的锁闭可靠性问题,研究了自锁阀锁闭失效机理,建立了工装-自锁阀有限元模型,并通过模态试验验证模型的正确性.基于模态叠加理论,研究自锁阀的冲击响应特性,根据冲击响应结果和阀芯能量分析,判断阀芯锁闭状态.为了验证分析结果的准确性,使用摆锤式冲击台开展冲击试验,得到的阀芯锁闭状态与理论分析结果吻合良好,说明了分析方法的有效性.本文的研究可为电磁式自锁阀的抗冲击设计提供理论基础和技术支撑.
Electromagnetic self-locking valves are widely used in spacecraft,such as satellites,launch vehicles,and spaceship.In strong impact environments,such as engine ignition,explosion of pyrotechnic devices,and separation of rockets,locking failures of self-locking valves may occur,which can affect the safe operation of the spacecraft.Aiming at the locking reliability of the electromagnetic self-locking valve under impact load,the paper studied the locking failure mechanism of the self-locking valve.A finite element model for the tooling and self-locking valve was established,the correctness of which was verified through modal tests.Based on the modal superposition theory,the shock response characteristics of the self-locking valve were studied,and the locking state of valve spool was judged according to the shock response results and the energy analysis of valve spool.In order to verify the accuracy of the analysis results,a pendulum impact platform was used to carry out impact tests.The locking state of the valve spool obtained was in good agreement with the theoretical results,indicating the effectiveness of the analysis method.The research in this article can provide theoretical foundation and technical support for the anti-shock design of electromagnetic self-locking valves.
作者
鞠震昊
闫寒
尤罡
张文明
JU Zhen-hao;YAN Han;YOU Gang;ZHANG Wen-ming(The State Key Laboratory of Mechanical System and Vibration,Shanghai JiaoTong University,Shanghai 200240,China;Shanghai Institute of Space Propulsion,Shanghai 201112,China)
出处
《动力学与控制学报》
2021年第6期89-96,共8页
Journal of Dynamics and Control
基金
国家自然科学基金资助项目(11902192)。
关键词
电磁自锁阀
冲击环境
有限元分析
锁闭状态
electromagnetic self-locking valves
shock environment
finite element analysis
locking state
