| 利用小波变换的双裂纹悬臂梁参数识别实验研究 |
| |
| 引用本文： | 张向东,刘录,张伟伟. 利用小波变换的双裂纹悬臂梁参数识别实验研究[J]. 机电产品开发与创新, 2006, 19(4): 22-24 |
| |
| 作者姓名： | 张向东 刘录 张伟伟 |
| |
| 作者单位： | 北京石油化工学院,机械工程系,北京,102617;太原理工大学,应用力学研究所,山西,太原,030024 |
| |
| 摘 要： | 将小波变换直接用于含裂纹悬臂梁的不同模态,利用小波系数在空间域上的突变指示裂纹位置,通过定义集中因子标定裂纹深度。并分析和讨论了悬臂梁前四阶模态对损伤的敏感性。通过本文的实验研究,检验了sym4小波在工程应用中的适用性,并指出二阶模态是较为敏感的损伤信息,有助于提高缺陷识别的精度和可靠性。
|
| 关 键 词： | 悬臂梁 小波理论 奇异性 损伤检测 裂纹 |
| 文章编号： | 1002-6673（2006）04-022-03 |
| 收稿时间： | 2006-05-22 |
| 修稿时间： | 2006-05-22 |
Experimental Studies on Double-Cracks Identification in the Beam-type Structures using Wavelet Analysis |
| |
| ZHANG Xiang-Dong,LIU Lu,ZHANG Wei-Wei. Experimental Studies on Double-Cracks Identification in the Beam-type Structures using Wavelet Analysis[J]. Development & Innovation of Machinery & Electrical Products, 2006, 19(4): 22-24 |
| |
| Authors: | ZHANG Xiang-Dong LIU Lu ZHANG Wei-Wei |
| |
| Affiliation: | 1.Mechanical Engineering Academy Beijing Institute of Petro-chemical Technology, Beijing 102617, China; 2.Institute of Appfied Mechanics, Taiyuan University of Technology, Taiyuan Shanxi 030024, China |
| |
| Abstract: | The wavelet transform is applied to the spatial-frequency analysis of the different modes of the cracked cantilever beam.The position of the crack is located by the sudden change in the spatial variation of the transformed response.The sensitivity of the first four mode shapes to crack location and depth are discussed.Furthermore,the defined intensity factor,which derives from a relation between behavior of the wavelet maxima for different scales and the Lipschitz exponent,can be used to estimate the size of the crack.The experimental results illustrate that the second mode is competitive candidate for crack parameter identification using the wavelet transform.This technique can easily be applied to on-line health monitoring of the structure. |
| |
| Keywords: | cantilever beam wavelet analysis singularity damage detection crack |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
