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论文类型：期刊论文

发表时间：2010-07-19

发表刊物：JOURNAL OF SOUND AND VIBRATION

收录刊物：SCIE、EI、Scopus

卷号：329

期号：15

页面范围：3008-3019

ISSN号：0022-460X

摘要：A time domain force identification approach for linear system is proposed. This approach can found a highly precise force identification model within the scope of general computer precision while it does not cost much computing time. Although the force identification model is accurate, the force identification process, like other inverse methods, is still ill-posed due to the inversion process and the white noise in measured structural responses. The singular value decomposition is used to reveal the intrinsically matter of the ill-posedness of force identification problem and a regularization technique is utilized to deal with this issue. Finally, the proposed method with the aid of regularization technique is successfully applied to identify the input forces in two numerical simulations. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.