Wavelet packet decomposition energy entropy extraction method for the tunnel void desease based on VMD

被引：0
作者：
Ju, Jinghui [1 ]
Zhao, Weigang [2 ]
Tian, Xiushu [3 ]
Fan, Boyang [1 ]
Shi, Zhuang [1 ]
Zheng, Weikang [1 ]
机构：
[1] School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang
[2] School of Safety Engineering and Emergency Management, Shijiazhuang Tiedao University, Shijiazhuang
[3] School of Material Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 22期
关键词：
energy entropy; partiole swarm optimization (PSO); variational mode deoomposition (VMD); void; wavelet packet decomposition (WPD);
D O I：
10.13465/j.cnki.jvs.2024.22.022
中图分类号：
学科分类号：
摘要：
As one of the main diseases of railway tunnels, the void disease affects the safe Operation of railway. The aeeurate deteetion of void disease is always one of the diffieulties in railway maintenanee department. To solve this problem, an aeoustie-solid coupling finite element model was established by using the Comsol Software, the acoustie signal characteristics under different working conditions were analysed and the extraction method of acoustie energy entropy was put forward based on the multi-algorithm fusion of particle swarm optimization - variational mode decomposition-wavelet packet decomposition (PSO-VMD-WPD). The VMD algorithm optimized by the PSO was used to process the void acoustie signal, then the signals with large correlation coefficients were extracted and reassembled, so as to suppress the low correlation modes in the original signal. The WPD was used to decompose the reconstrueted signal, select the frequency segment with greater influential void signal, calculate the decomposition layer number of WPD and extract the energy entropy of the sub-signal. The results show that; when the energy entropy of 6 250-9 375 Hz frequency band in the acoustie signal is less than 0. 264, void disease appears in the concrete strueture. When the VMD algorithm is used to process the acoustie signal of the concrete void, the energy entropy of the 6 250-9 375 Hz band in the signal is obviously reduced after the sub-signal with a correlation coefficient greater than 0. 3 is selected for reconstruetion. © 2024 Chinese Vibration Engineering Society. All rights reserved.
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页码：199 / 208
页数：9
相关论文
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