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Refinement of reduced-models for dynamic systems

Refinement of reduced-models for dynamic systems

作     者:Sau-Lon James Hu 

作者机构:Department of Ocean Engineering University of Rhode Island Narragansett RI 02882-1197 USA 

出 版 物:《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期:2008年第18卷第8期

页      面:993-997页

核心收录:

学科分类:07[理学] 070102[理学-计算数学] 0701[理学-数学] 

基  金:National Natural Science Foundation of China (Grant No. 50739004) the National High Technology Research and Development Program of China (Grant No. 2006AA09Z331) 

主  题:Model reduction Model re?nement Finite element method Modal analysis Structural dynamics 

摘      要:A refinement procedure for the reduced models of structural dynamic systems is presented in this article. The refinement procedure is to tunethe parameters of a reduced model, which could be obtained from any traditional model reduction scheme, into an improved reduced model. Upon the completion of the refinement, the improved reduced model matches the dynamic characteristics-the chosen structural frequencies and their mode shapes-of the full order model. Mathematically, the procedure to implement the model refinement technique is an application of the recently developed cross-model cross-mode (CMCM) method for model updating. A numerical example of reducing a 5-DOF (degree-of-freedom) classical mass-spring (or shear-building) model into a 3-DOF generalized mass-spring model is demonstrated in this article.

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