If cracks appear in the welding of reinforced plate structures on large ships,it will reduce the strength of the reinforced plate structure and bring unpredictable risks to ship navigation safety.Therefore,an online detection method for welding cracks in reinforced plate structures on large ships is studied.This method uses finite element software Ansys to simulate the welding crack mode of the stiffened plate structure based on the structural parameters of the ship's stiffened plate,and obtains the welding crack mode of the large ship's stiffened plate structure.Based on this mode,an improved con-tinuous wavelet decomposition method is used to obtain the wavelet coefficients corresponding to the cracks from the weld-ing crack mode of the stiffened plate structure.By obtaining the mutation point of the wavelet coefficients of the crack mode,Obtain online detection results for the depth,length,and width of welding cracks in the reinforced plate structure based on this mutation point.The experimental results show that this method can effectively obtain the mode of welding cracks in ship reinforced plate structures,and based on this mode,the length and width of welding cracks in ship reinforced plate structures can be detected online,with better application effects.
关键词
大型船舶/加筋板/结构焊接/裂纹在线检测/振动模态/小波变换
Key words
large vessels/reinforced plate/structural welding/online crack detection/vibration mode/wavelet transform
维普
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