摘要
根据结构件宽带随机振动原理,用NASTRAN有限元分析软件对某航天器姿态控制机组的随机振动应力进行了动力学分析。用大质量法模拟基础加速度激励,用模态法计算频率响应。分析表明,计算值与试验结果基本一致。该分析法可在设计阶段用于预示产品的随机振动响应。
According to the theory of wlde-band random vibration analysis of structure component, the dynamic analysis of random vibration stress for some spacecraft attitude control thruster set was made by NASTRAN finite element method （FEM） software in this paper. The base acceleration excitation was simulated by big mass method and frequency response was calculated by mode method. The analysis showed that the computation result of FEM was agreed with the test one. This method could be applied on prediction of the random vibration response in design stage.
出处
《上海航天》
北大核心
2007年第3期54-57,共4页
Aerospace Shanghai
关键词
结构件
随机振动
有限元法
加速度响应
Structural component
Random vibration
Finite element method
Acceleration response
