System Identification of Structures with Incomplete Modal Information

in International Symposium (oral presentation paper), 國際研討會(全文口頭發表)
標題System Identification of Structures with Incomplete Modal Information
出版類型國際研討會(全文口頭發表)
出版年度2018
AuthorsLin, 林章生
出版日期Jun 6 2018 12:0
會議地點Greenville, South Carolina
其他編號0000
中文摘要

The topic of this paper is system identification of structures conducted with consideration of incomplete modal information. A continuum structure has infinite number of degrees of freedom and an infinite number of modes. Modal estimation method is therefore not employed to identify all modes of systems. In addition, incomplete modal information may be led from insufficient response data in practical vibration measurement. In this paper, by using channel-expansion technique, modal estimation from response data of insufficient channel can be performed through the Ibrahim time-domain method. Applicability and effectiveness of the proposed method is demonstrated by numerical simulation of a chain model. Identification of the mode shapes, however, is still a challenging problem to be resolve in the proposed method from incomplete modal information data.

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