Acoustic emission non-destructive testing method for crane girder damage based on adaptive optimization vmd
A crane and acoustic emission technology, which is used in material analysis using sonic emission technology, solid analysis using sonic/ultrasonic/infrasonic waves, complex mathematical operations, etc., and can solve problems such as immaturity
Active Publication Date: 2021-12-17
SOUTHEAST UNIV
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At present, the research on acoustic emission technology in the detection of structural defects and structural integrity evaluation of crane girders is still immature, and the processing of acoustic emission signals and the location of acoustic emission sources have always been the focus and difficulty of acoustic emission detection of crane girders
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[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:
[0043] The invention provides an acoustic emission nondestructive detection method for crane main girder damage based on self-adaptive optimization VMD, aiming to realize the whole process dynamic detection of crane main girder structure from feature extraction to damage identification stage, and the method can be used for damage monitoring of crane main girder. Provide an efficient solution that can be solved.
[0044] figure 1 It is a flow chart of the present invention. The steps of the present invention will be described in detail below with reference to the flow chart.
[0045] Step 1. Install corresponding sensors on the main beam of the crane to establish a bending damage acoustic emission monitoring system, and obtain the acoustic emission signal of the damage process;
[0046] Step 2, performing adaptive optimization VMD p...
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A nondestructive acoustic emission detection method for crane girder damage based on adaptive optimization VMD. The steps are as follows: (1) Install corresponding sensors on the crane girder to establish a structural damage acoustic emission monitoring system to obtain acoustic emission signals during the damage process. (2) Adaptive optimization VMD processing is performed on the collected acoustic emission signal to realize adaptive filtering and noise reduction processing of the original signal. (3) According to the frequency domain characteristics of the acoustic emission reconstructed waveform, determine the center-of-gravity frequency distribution of the acoustic emission event during the damage process. (4) By analyzing the frequency distribution range of the center of gravity of the acoustic emission signal, the evaluation index of the frequency of the center of gravity of the damage is established, and the different damage stages of the main girder of the crane are judged. The invention is simple and easy, and the method can monitor and identify the internal damage of the main girder of the crane in real time and dynamically.
Description
technical field [0001] The invention relates to the technical field of damage identification in industrial production, in particular to an acoustic emission nondestructive detection method for damage to a crane main girder based on self-adaptive optimization VMD. Background technique [0002] As one of the eight categories of special equipment, cranes have been widely used in machinery, metallurgy, construction and other industries in recent years. At present, with the rapid development of domestic related industries, cranes, as an indispensable key equipment in their industries, are developing in the direction of large-scale, high-speed and diversified functions. The substantial increase in the operating speed, lifting tonnage and lifting height of cranes has effectively improved the production efficiency of enterprises, but correspondingly, the probability of full-load work of cranes has increased, and the workload has increased, and some cranes are at high stress levels m...
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IPC IPC(8): G01N29/04G01N29/14G06F17/14
CPCG01N29/04G01N29/14G06F17/14
Inventor 李杨许飞云胡建中贾民平黄鹏彭英
Owner SOUTHEAST UNIV