| 基于小波分析的弹性板损伤识别 |
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| 引用本文： | 管德清,陈支援.基于小波分析的弹性板损伤识别[J].长沙理工大学学报(自然科学版),2009,6(2):23-27,66. |
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| 作者姓名： | 管德清 陈支援 |
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| 作者单位： | 长沙理工大学,土木与建筑学院,湖南,长沙,410004 |
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| 摘 要： | 以含有损伤的四边简支矩形板为研究对象,采用等效刚度代替板内损伤带的刚度,建立了含有多条损伤带的弹性板有限元模型.运用有限元法分析板的振动特性,由Lanczos法计算得到沿板边两个方向的转角模态.通过对板的转角模态进行db1连续小波变换,利用小波系数模极大值点判断板内损伤带的位置,给出了一种识别弹性板损伤的方法.通过对一含3条损伤带的四边简支矩形板进行损伤识别,验证了方法的有效性.
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| 关 键 词： | 弹性板 损伤识别 转角模态 小波变换 有限元 |
Damage identification research of elastic plate by means of the wavelet analysis |
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| GUAN De-qing,CHEN Zhi-yuan.Damage identification research of elastic plate by means of the wavelet analysis[J].Journal of Changsha University of Science and Technology:Natural Science,2009,6(2):23-27,66. |
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| Authors: | GUAN De-qing CHEN Zhi-yuan |
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| Institution: | School of Civil and Architecture Engineering;Changsha Universityof Science and Technology;Changsha 410004;China |
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| Abstract: | This research is focused on the four sides simply-supported damaged rectangular plate,using the equivalent stiffness in place of the damaged plate stiffness,and an elastic finite element plate model with several damage regions is established.Adopting the finite element method analysis the vibration characteristic of the plate,the angle displacement mode of the plate along its two directions is calculated by the Lanczos method.The angle displacement mode is analyzed as signal by db1 wavelet,the location of t... |
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| Keywords: | elastic thin plate damage identification angle displacement mode wavelet transform finite element methods |
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