航天器结构模型优化修正方法的研究

Optimal algorithm of spacecraft structural model updating

航天器结构设计通常利用试验数据进行模型修正 ,以使修正后模型接近真实结构和提高结构有限元分析预示精度 ,并有可能取代某些大型结构试验 ,如结构星试验等。这种结构设计方法既可节约研制经费 ,又可缩短研制周期 ,具有明显的经济效益和工程应用前景。本文导出了迭代 IRS缩聚方法 ,提出了相对灵敏度概念 ,建立了模型修正的优化理论模型。在利用五院自编有限元软件 DASS的基础上 ,开发了航天领域模型修正软件初版MU SS1.0。最后 。

In spacecraft structure design,FEM updated by test data,so the updated structural model could simulate the structural mechanical behavior more accurately.The updated structural model should replace some expensive structural test,such as full size structural test with simulated ultimate load.It should take shorter time and cost less money using the new design methodology.The dynamic reduction,sensitivity analysis and optimize arithmetic of spacecraft structural Model Updating are studied.Based on the FEM software DASS,we wrote the model updating software MUSS1 0.At last,MUSS1 0 had been validated in two simulating examples and an instance.