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| 基于小波变换的圆柱壳损伤识别方法研究 | |
| 引用本文： | 李海涛,陈建云,王志华.基于小波变换的圆柱壳损伤识别方法研究[J].太原理工大学学报,2011,42(4):437-441. |
| 作者姓名： | 李海涛 陈建云 王志华 |
| 作者单位： | 1. 太原理工大学采矿工艺研究所,太原030024;中北大学理学院,太原030051 2. 广西大学土木建筑工程学院,南宁,530004 3. 太原理工大学应用力学与生物医学工程研究所,太原,030024 |
| 基金项目： | 山西省优秀青年学术带头人项目 |
| 摘 要： | 将连续小波变换识别裂纹的基本原理运用于圆柱壳的损伤识别研究,利用sym4小波对含裂纹圆柱壳的前四阶振型信息进行多分辨率分析以及连续小波变换,能够准确地识别出裂纹的位置;考虑到实测信号往往是含噪声信号,进一步研究了噪声对识别结果的影响。通过数值算例验证了其可靠性,表明此方法在圆柱壳结构损伤诊断中具有一定的应用价值。 |
| 关 键 词： | 损伤识别 裂纹 小波变换 圆柱壳 |
Analysis of Damage Detection in Cylindrical Shell Based on Wavelet Transform |
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| LI Hai-tao,CHEN Jian-yun,WANG Zhi-hua.Analysis of Damage Detection in Cylindrical Shell Based on Wavelet Transform[J].Journal of Taiyuan University of Technology,2011,42(4):437-441. | |
| Authors: | LI Hai-tao CHEN Jian-yun WANG Zhi-hua |
| Institution: | LI Hai-tao 1a,2,CHEN Jian-yun3,WANG Zhi-hua 1b(1a.Institute of Mining Technology,1b.Institute of Applied Mechanics,TUT,Taiyuan 030024,China,2.School of Science,North University of China,Taiyuan 030051,3.College of Civil and Architectural Engineering,Guangxi University,Nanning 530004,China) |
| Abstract: | The fundamental principle of crack identification based on continuous wavelet transform was applied to the spatial-frequency analysis of the cracked cantilever cylindrical shell structures.The crack position can be detected exactly by multi-resolution analysis and continuous wavelet transform of the first four mode shapes in spatial domain using sym4 wavelet transform,and the effect of noise to the results of recognition was studied.The simulation results illustrated its dependability,and indicated the meth... |
| Keywords: | damage detection crack wavelet transform cylindrical shell |
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