| 基于连续小波变换的加筋板结构焊接裂纹检测(英文) |
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| 引用本文： | 李晓飞,余音.基于连续小波变换的加筋板结构焊接裂纹检测(英文)[J].船舶力学,2009,13(3). |
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| 作者姓名： | 李晓飞 余音 |
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| 作者单位： | 1. 上海交通大学船舶海洋与建筑工程学院,上海,200030
2. 上海交通大学空天科学技术研究院,上海,200030 |
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| 摘 要： | 研究了如何使用连续小波变换工具来对加筋板结构的焊接裂纹进行检测.首先分析了裂纹对于板在焊缝位置的振动模态造成的影响,用有限元法求得含有不同长度焊接裂纹的加筋板结构的振动模态.然后对焊缝处板的振动模态信号进行连续小波变换,根据小波系数的极值判断裂纹位置和裂纹长度.研究结果表明,当裂纹很短时,其位置也可以很容易地被确定;而且当裂纹扩展到一定程度时,其长度也可以被检测出来.
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| 关 键 词： | 焊接裂纹 加筋板结构 连续小波变换 |
Identification of the Welding Crack on the Stiffened Plate Structure Using the Continuous Wavelet Transform |
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| LI Xiao-fei,YU Yin.Identification of the Welding Crack on the Stiffened Plate Structure Using the Continuous Wavelet Transform[J].Journal of Ship Mechanics,2009,13(3). |
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| Authors: | LI Xiao-fei YU Yin |
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| Institution: | a. School of Naval Architecture;Ocean and Civil Engineering;b. Institute of Aerospace Science and Technology;Shanghai Jiao Tong University;Shanghai 200030;china |
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| Abstract: | Identification of the welding crack on the stiffened plate structure using the continuous wavelet transform is studied in this paper.The effect of the welding crack on the vibration mode of the welding line in the plate is analyzed first.Vibration modes of the damaged stiffened plate structures with cracks of different length are calculated using the finite element method.Mode signals on the welding line in the plates are analyzed using the continuous wavelet transform.The crack location and length can be i... |
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| Keywords: | welding crack stiffened plate structure continuous wavelet transform |
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