卫星结构的拓扑优化与灵敏度分析

在已知某卫星主承力结构的空间大小、约束及载荷条件的情况下，通过对一连续体进行拓扑优化得出主承力结构的最优结构形式。并在此基础上对卫星上十五个结构参数进行了灵敏度分析和尺寸优化，计算结果证明由连续体通过拓扑优化得到桁架结构的最优拓扑是可行的，若再结合灵敏度分析及尺寸优化，可以大幅度减轻卫星结构重量，改善卫星结构的动力特性。

Topology optimization and sensitivity analysis of satellite structure

With the development of satellite structure,more and more design parameters will affect its structural performances.In order to take all design parameters into account and design the most reasonable satellite structure,we need to optimize the structure in many aspects.This paper first applied topology optimization to a spatial truss in a satellite and obtained its optimum structural form through a continuum under the given constraints and load conditions.Then applied sensitivity analysis and sizing optimization to 15 structural parameters of the satellite and gained the optimum sizes.The calculation result proves that it is feasible to get the optimum structural form through a continuum's topology optimization.With the help of sensitivity analysis and sizing optimization,the satellite's weight can be reduced obviously and its dynamic performance can be improved.