Application of continuous wavelet transformation to the modal identification of a structure

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Abstract

This paper proposes a procedure for identifying modal parameters of a linear structure using the continuous wavelet transform. The merits of the proposed procedure over the exiting schemes of applying the wavelet transform to system identification for a linear system are in use of the shift property and filtering ability of the transform to enhance the efficiency of identifying the modal parameters of a structure. The effectiveness and accuracy of the proposed procedure are validated through analyzing simulated responses of a six-story shear building subjected to base excitation. The Meyer wavelet function is adopted in this analysis, and the effect of noise on identifying the modal parameters of the structure is also explored. Finally, the procedure is applied to process the measured responses of a multi-span arch bridge from its free vibration tests.

Original languageEnglish
Title of host publicationWind and Earthquake Engineering - Proceedings of the 10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
Pages35-40
Number of pages6
StatePublished - 1 Dec 2006
Event10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010 - Bangkok, Thailand
Duration: 3 Aug 20065 Aug 2006

Publication series

NameWind and Earthquake Engineering - Proceedings of the 10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
Volume3

Conference

Conference10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
CountryThailand
CityBangkok
Period3/08/065/08/06

Keywords

  • Continuous wavelet transform
  • Earthquake responses
  • Free vibration responses
  • Linear system
  • Modal identification

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