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| 基于小波分析的悬臂梁裂纹参数识别方法研究 | |
| 引用本文： | 张伟伟,王志华,马宏伟.基于小波分析的悬臂梁裂纹参数识别方法研究[J].机械强度,2007,29(2):201-205. |
| 作者姓名： | 张伟伟 王志华 马宏伟 |
| 作者单位： | 1. 暨南大学,理工学院,广州,510632 2. 太原理工大学,应用力学研究所,太原,030024 3. 暨南大学,理工学院,广州,510632;太原理工大学,应用力学研究所,太原,030024 |
| 摘 要： | 通过对含裂纹悬臂梁的应变能信号进行小波分析,悬臂梁的裂纹位置可由小波系数的局部极大值给出,并通过小波系数局部极大值定义集中因子和裂纹深度之间的关系,以此估计裂纹深度.数值算例表明, 利用sym4小波对含裂纹梁的应变能信号进行小波分析,可以准确识别出裂纹的位置和深度,这一方法很容易推广应用到结构的在线监测中. |
| 关 键 词： | 损伤检测 裂纹 小波分析 在线监测 小波分析 悬臂梁 裂纹参数 识别方法 研究 WAVELET ANALYSIS CANTILEVER BEAM IDENTIFICATION CRACK 在线监测 结构 应用 裂纹深度 裂纹位置 裂纹梁 小波对 利用 数值算例 估计 关系 |
| 修稿时间： | 2005-06-272005-08-09 |
STUDIES ON CRACK IDENTIFICATION IN A CANTILEVER BEAM USING WAVELET ANALYSIS |
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| ZHANG WeiWei,WANG ZhiHua,MA HongWei.STUDIES ON CRACK IDENTIFICATION IN A CANTILEVER BEAM USING WAVELET ANALYSIS[J].Journal of Mechanical Strength,2007,29(2):201-205. | |
| Authors: | ZHANG WeiWei WANG ZhiHua MA HongWei |
| Abstract: | The wavelet transform is applied to the spatial-frequency analysis of the strain energy signal of the cracked cantilever beam in spatial domain. The location of the crock is detected by the sudden change in the spatial variation of the transformed response. The intensity factor related to the coefficients of the wavelet transform can be used to estimate the size of the crack. The relationship between intensity factor and the crack size is established. The Simulation restdts illustrate that the crack location and the size can be detected exactly by sym4 wavelet transform of the strain energy information in spatial domain. This method can easily be applied to on-line health monitoring of a crack flaw. |
| Keywords: | Damage detection Crack Wavelet analysis Online diagnosis |
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