面向撞击载荷的疲劳寿命分析及验证  

Analysis and Verification of Fatigue Life for Impact Loads

作　　者：赵正阳 张楚贤 冯萃峰 蔡立兵 刘文成 王子文 ZHAO Zheng-yang;ZHANG Chu-xian;FENG Cui-feng;Cai LI-bing;Liu Len-Cheng;Wang Zi-wen(Beijing Institute of Aerospace Micro-electromechanical Technology Co.Ltd.,Beijing 100094)

机构地区：[1]北京航天微机电技术研究所,北京100094

出　　处：《机电元件》2024年第1期39-44,共6页Electromechanical Components

基　　金：中央军委装备发展部微波器件技术攻关(1807WZ0003)。

摘　　要：针对宇航用波导开关在反复切换撞击工况下的寿命指标要求,开展疲劳寿命设计与验证。在实际工况应力谱难以获得的情况下,基于数值计算方法,采用两种不同方法获取应力谱后开展疲劳寿命分析并进行了试验验证,验证结果表明:基于瞬态动力学的疲劳分析有较高的准确性,在此基础上,优化改进产品结构,使产品切换寿命满足指标要求。Aiming at the life index requirements of aerospace waveguide switches under repeated switching and impact conditions,the fatigue life design and verification are carried out.In the case that the stress spectrum of actual working conditions is difficult to obtain,the fatigue life analysis is carried out and the experimental verification is carried out by using two different methods to obtain the stress spectrum based on the numerical calculation method.The physical verification results show that the fatigue life analysis results based on the transient dynamics have a high accuracy.On this basis,the product structure is optimized and improved to make the product switching life meet the index requirements.

关 键 词：波导开关 疲劳寿命 应力谱 瞬态动力学 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]