含非线性特性的卫星压紧释放机构动力学研究

针对卫星新型压紧释放机构的局部非线性特性,建立局部非线性结构模型,通过模拟加载得到局部非线性结构的力-位移曲线,根据实际结构的工作情况定义结构等效刚度载荷和位移限制的选取原则,并求解结构等效刚度取值区间,最后针对天线动力学特性开展区间不确定性分析.分析结果与试验结果能够很好地吻合,天线基频误差在10％以内,满足工程应用...

Study on dynamics of satellite hold-down and release mechanism with nonlinear characteristics

In view of the local non-linear characteristics of the new hold-down and release mechanism for satellites, a local non-linear structure model was proposed. The force displacement curves of the local non-linear structure were obtained by simulating the loading. Based on the actual working conditions of the structure, the selection principle of equivalent stiffness load and displacement limit of the structure was defined, and the equivalent stiffness value interval of the structure was solved. Finally, an interval uncertainty analysis was carried out for the dynamic characteristics of the antenna. The results of the analysis are in good agreement with the test results. The basic frequency error of the antenna is less than 10%, meeting the requirements of engineering application. The validity of the analysis method was illustrated. The interval analysis method of equivalent stiffness of local nonlinear structure proposed in this paper provides a solution for the nonlinear dynamic analysis of new hold-down and release mechanism of satellite antenna, and also provides a reference for other local nonlinear structural dynamic analysis.