采用Jetm undsen频域子结构法,针对空间刚架结构的综合进行了数值仿真,研究了界面自由度的完整性对于综合结果的影响,讨论了一种间接获取转角自由度相关频响函数信息的方法。仿真结果显示,频域子结构综合法能够有效地预报结构的动力学性能,而通过引入间接获取的转角自由度的频响信息能在一定程度上改善预报质量。
This paper presents numerical simulations of a spatial truss structure using the Jetmundsen FRF based substructuring technique.The effect of integrity of interface degrees of freedom on synthesis results is studied by means of FEA method.An indirect estimation method for FRF on rotational degrees that is based on modal analysis technique is discussed.Simulation results indicate that dynamic characteristics of the structure may be effectively obtained using the substructure synthesis method.The introduction of rotational degrees of freedom may improve the estimation quality.