空间桁架结构动态特性的有限元分析  

Finite Element Analysis of Dynamic Characteristics for Space Truss Structure

作　　者：佟川[1] 白争锋[2] 

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]哈尔滨工业大学(威海)机械工程系,威海264209

出　　处：《科学技术与工程》2014年第11期142-146,共5页Science Technology and Engineering

基　　金：国家自然科学基金(51305093);中国博士后科学基金(2012M520723);山东省自然科学基金项目(ZR2013EEQ004)资助

摘　　要：随着航天技术的发展,大型空间桁架结构在航天工程中得到了越来越广泛的应用。针对空间飞行器桁架结构,应用有限元方法对结构动态特性进行了研究,首先建立了桁架结构的有限元模型,进一步对桁架结构施加空间扰动激励,对桁架结构进行了结构动态特性仿真,详细地分析了空间扰动对桁架结构动态特性的影响。最后,分析了不同材料对桁架结构动态特性的影响。仿真分析结果可以准确地预测空间扰动对飞行器桁架结构动态特性的影响,有利于对飞行器结构进行振动控制,提高飞行器星载设备的精度和性能。Large space truss is used more and more widely in spacecrafts as the development of aerospace tech nology. The dynamic characteristics of space truss structure on spacecraft are studied based on the finite element method （FEM）. First, the finite element model of space truss structure is established. Further, the disturbance ex citation is applied to the truss structure and the dynamic characteristics simulation is implemented. The effects ofdisturbance on dynamic characteristics of truss structure are investigated. Finally, the effects of different materials on dynamic characteristics of truss structure are analyzed. The simulation results can accurately predict the effects of disturbance on dynamic characteristics of space truss, which is useful for vibration control of spacecraft structure and can improve the accuracy and performance of spacecraft equipment.

关 键 词：空间桁架 有限元分析 柔性结构 动态特性 

分 类 号：TB115[理学—数学]