Modal Estimation of Systems with incomplete modal information

in International Symposium (oral presentation paper), 國際研討會(全文口頭發表)
標題Modal Estimation of Systems with incomplete modal information
AuthorsLin, 林章生, & Lin 林銘賢
出版日期Nov 24 2017 12:0

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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