Quantitative Damage Identification of Frame Structure Based on Wavelet Packet Energy Curvature Difference Under Environmental Excitation

LI Hongyi; SHAO Weiwei; ZHU Zhanlong; YANG Weijun

doi:10.13204/j.gyjzG21112501

Volume 52 Issue 10

Oct. 2022

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LI Hongyi, SHAO Weiwei, ZHU Zhanlong, YANG Weijun. Quantitative Damage Identification of Frame Structure Based on Wavelet Packet Energy Curvature Difference Under Environmental Excitation[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(10): 78-83. doi: 10.13204/j.gyjzG21112501

Citation:

LI Hongyi, SHAO Weiwei, ZHU Zhanlong, YANG Weijun. Quantitative Damage Identification of Frame Structure Based on Wavelet Packet Energy Curvature Difference Under Environmental Excitation[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(10): 78-83. doi: 10.13204/j.gyjzG21112501

Citation:

LI Hongyi, SHAO Weiwei, ZHU Zhanlong, YANG Weijun. Quantitative Damage Identification of Frame Structure Based on Wavelet Packet Energy Curvature Difference Under Environmental Excitation[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(10): 78-83. doi: 10.13204/j.gyjzG21112501

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Quantitative Damage Identification of Frame Structure Based on Wavelet Packet Energy Curvature Difference Under Environmental Excitation

doi: 10.13204/j.gyjzG21112501

Northwest Research Institute Co., Ltd., CREC, Lanzhou 730000, China

Received Date: 2021-11-25
Available Online: 2023-03-22

Abstract

Abstract

The effectiveness of the wavelet packet energy curvature difference for damage identification has been verified by numerical simulations, laboratory tests, and engineering projects, but the quantitative analysis of structural damage is lacking. Taking the three-layer space frame structure as the research object, this study used the finite element software Abaqus for numerical simulation and dynamic time history analysis. Moreover, it introduced the virtual impulse response function to investigate the effects of the external structural excitation, damage degree, damage location, and elastic modulus on its recognition effect and study the quantitative estimation of the degree of structural damage by the wavelet packet energy curvature difference. The results indicate that the introduction of the virtual impulse response function does not affect the damage-location recognition effect of the wavelet packet energy curvature difference and can effectively reduce the influence of external excitation. The structural damage degree and damage location, however, have an impact on it, and when the elastic modulus is equal to or greater than 3.0×10¹⁰ Pa, it exerts no influence. The numerical fitting formula can effectively identify the degree of structural damage in a quantitative manner.
- wavelet packet energy curvature difference,
- frame structure,
- virtual impulse response function,
- damage quantification

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References(17)

References

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