Research Based on Modal Curvature and Wavelet Transform for Identifying Damage of Reticulated Shell Structures

Meng Hong Wang; Chen Meng Ji; Shan Shan Luo

doi:10.4028/www.scientific.net/AMM.501-504.905

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 501-504Research Based on Modal Curvature and Wavelet...

Research Based on Modal Curvature and Wavelet Transform for Identifying Damage of Reticulated Shell Structures

Abstract:

In this paper, a research is carried on to identify damage of reticulated shell structures based on the combination of modal curvature method and wavelets transform method. Take a scaled model of the reticulated shell structure as an example to analyze, the cross section of one member supposed to have a slight damage of stiffness reduction. In order to locate the damage, modal curvatures of the structure are taken as damage indexes to perform continuous wavelet transform. Results of the numerical analysis indicate that the difference of wavelet transform coefficients of modal curvature can be used to locate damage roughly, while the wavelet transform coefficients of modal curvature difference can be used to locate damage more precisely with easier and more reliable data processing. So it is clear that the damage identification based on modal curvature and wavelet transform is quite effective.

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Periodical:

Applied Mechanics and Materials (Volumes 501-504)

Pages:

905-910

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.501-504.905

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Online since:

January 2014

Authors:

Meng Hong Wang, Chen Meng Ji, Shan Shan Luo

Keywords:

Identify Damage, Modal Curvature, Reticulated Shell, Wavelet Transform (WT)

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