摘要
对航天器结构中常用的一字型空间桁架,基于建立的普通式和拉索式空间桁架结构简化模型,用有限元法建立空间桁架结构模型,分别对两种空间桁架结构的模态特性、谐响应和瞬时激励响应等动力学特性进行了仿真研究,分析了拉索式空间桁架结构的弦张力对桁架结构振动特性的影响。研究较好地模拟了大挠性空间桁架结构的动力学特性及其在外太空的真实工况,有一定的参考意义。
The dynamic finite element models of large straight-line flexible space truss （LFST） of satellite were established based on the scale models of erectable and deployable truss structure in this paper. The dynamic characteristics of modal frequency, modal damping ratio and transient response for the two types of LFST were studied by the simulation. The effect of diagonal force of the deployable space truss on vibration frequency was analyzed. The dynamic characteristic and real state in space of the LFST were simulated well in this research, which was valuable.
出处
《上海航天》
2012年第1期52-55,共4页
Aerospace Shanghai
关键词
大挠性空间桁架
有限元模型
动力学特性
振动控制
Large straight-line flexible space truss
Finite element model Dynamic characteristic
Vibration
