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- W4249486550 abstract "In structural health monitoring (SHM), data-driven is a model free method that mines the internal characteristics of the raw measured responses, does not need considering the structural model. This paper proposes a new data-driven damage detection method based on wavelet packet transform (WPT) combining with principal component analysis (PCA). In this method, the responses are firstly decomposed by WPT, and each layer of wavelet packet energy of each measurement is obtained. Since the wavelet packet components of small energy magnitudes are easily contaminated by noises and should be discarded. PCA is utilised to reduce and eliminate redundant information of wavelet packet energy, and a damage index named the rate of the wavelet packet energy score change (WPESCR) is proposed to locate the damage. A simple beam is employed to demonstrate the effectiveness of this method. The numerical and experimental results show that the method combined with WPT and PCA can successfully locate the damage. As a data-driven method, the new WPESCR indicator is a better candidate for continuous online SHM." @default.
- W4249486550 created "2022-05-12" @default.
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- W4249486550 date "2019-01-01" @default.
- W4249486550 modified "2023-10-15" @default.
- W4249486550 title "Structural damage detection using wavelet packet transform combining with principal component analysis" @default.
- W4249486550 doi "https://doi.org/10.1504/ijlcpe.2019.100337" @default.
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