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Identification of modal parameters of a mdof system by ...

JOURNAL OFSOUND ANDVIBRATIONJ ournal of Sound and Vibration 295 (2006) 827 837 Identification of modal parameters of a mdof systemby modified L P wavelet packetsArunasis Chakrabortya, Biswajit Basua, , Mira MitrabaDepartment of Civil, Structural and Environmental Engineering, Trinity College Dublin, IrelandbDepartment of Aerospace Engineering, Indian Institute of Science, Bangalore, IndiaReceived 21 May 2003; received in revised form 11 January 2006; accepted 24 January 2006 Available online 11 April 2006 AbstractIn this paper a methodology for identification of modal parameters of a structural system using wavelet analysis isproposed. The proposed technique differs from the other works on using wavelet for this problem in the choice of the basisfunction.

analysis, time–frequency analysis, non-stationary analysis, discontinuity detection, data compression, system identification and damage detection among many others. The capability of the wavelet for carrying out time–frequency analysis has been exploited in this paper for the identification of modal parameters of a mdof dynamical system.

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