基于信息融合技术的结构模型修正研究
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摘要
提出基于信息融合技术的结构模型修正法.在概率思维条件下,采用二次响应面代替有限元模型,通过调整融合系数实现先验信息和实测信息的融合,并利用响应面自身特性和精度要求进行迭代修正.该方法计算量小,程序化高,易于工程应用,还可推广至非线性等复杂情况.某抽水蓄能电站地下厂房结构的有限元模型修正结果验证了该方法的有效性.
A new model updating method based on Bayes and information fusion is established.Samples are designed by test and second-order response surface is adopted as the fast operation model which can be easily modified and perfected by fully use of prior knowledge.This method can be generalized to large and complicated nonlinear structures for its computational efficiency and solution convergence.The underground powerhouse of pumped-storage power station is employed to verify the effectiveness of the method.
A new model updating method based on Bayes and information fusion is established.Samples are designed by test and second-order response surface is adopted as the fast operation model which can be easily modified and perfected by fully use of prior knowledge.This method can be generalized to large and complicated nonlinear structures for its computational efficiency and solution convergence.The underground powerhouse of pumped-storage power station is employed to verify the effectiveness of the method.
引文
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[2]Berman A,Flannelly W G.Theory of incomplete mod-els of dynamic structures[J].AIAA,J,1971,9(8):454.
[3]李辉,丁桦.结构动力模型修正方法研究进展[J].力学进展,2005,35(2):170-180.(Li H,Ding H.Pro-gress in model updating for structural dynamics.Ad-vances in Mechanics.2005,35(2):170-180.(in Chi-nese))
[4]费庆国,张令弥,李爱群,郭勤涛.基于统计分析技术的有限元模型修正研究[J].振动与冲击.2005,24(3):3-26.(Fei Q G,Zhang L M,Li A Q,Guo Q T.Finite element model updating using statistics analy-sis.Journal of Vibration and Shock[J].2005,24(3):3-26.(in Chinese))
[5]费庆国,张令弥,王彤.用于结构计算仿真的神经网络样本点选择方法研究[J].地震工程与工程振动.2005,25(1):21-25.(Fei Q G,Zhang L M,Wang T.Evaluation of sampling techniques for neural networksapplied to computational simulation of structures[J].Earthquake Engineering and Engineering Vibration.2005,25(1):21-25.(in Chinese))
[6]费庆国,张令弥.基于径向基神经网络的有限元模型修正研究[J].南京航空航天大学学报.2004,36(6):748-752(Fei Q G,Zhang L M.Finite element modelupdating using radial basis function neural network.Journal of Nanjing University of Aeronautics and As-tronautics[J].2004,36(6):748-752.(in Chinese))
[7]韩芳.复杂结构模型动力修正技术研究[D].武汉:武汉大学博士论文,2008.(HAN F.Theoretical Re-search on Dynamic Model Modification Technologyfor Complex Structures[D].Wuhan:Wuhan Universi-ty.2008.(in Chinese))
[8]刘继军.不适定问题的正则化方法及应用[M].北京:科学出版社,2005.(Liu J J.Regularization Methodand Application for Ill-posed Problem[M].Beijing:Science Press.2008.(in Chinese))
[9]陈立周.稳健设计[M].北京:机械工业出版社,2000.(Chen L Z.Robust Design[M].Beijing:MachineryIndustry Press.2000.(in Chinese))
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