Damage detection of a rectangular plate by spatial wavelet based approach

被引:95
作者
Chang, CC [1 ]
Chen, LW [1 ]
机构
[1] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 70101, Taiwan
关键词
spatial wavelet; damage; rectangular plate; finite element;
D O I
10.1016/j.apacoust.2004.01.004
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
This paper presents a technique for structure damage detection based on spatial wavelet analysis. Many damage detection methods require modal properties before and after damage. This method only needs the spatially distributed signals (e.g. the displacements or mode shapes) of the rectangular plate after damage. First, spatially distributed signals of the rectangular plate with damage are obtained by finite element method. The damaged region is represented as the elements with reduced stiffness. Then these spatially distributed signals are analyzed by wavelet transformation. It is observed that distributions of the wavelet coefficients can identify the damage position of rectangular plate by showing a peak at the position of the damage. It is also demonstrated that this method is very sensitivity to the damage size. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:819 / 832
页数:14
相关论文
共 14 条
[1]  
ASHINO R, 1997, WAVELET ANAL ITS ORI
[2]  
BUTTERS JN, 1977, OPT LASER TECHNO JUN, P117
[3]  
CAWLEY P, 1979, AM SOC MECH ENG DES
[4]   Application of the strain energy damage detection method to platelike structures [J].
Cornwell, P ;
Doebling, SW ;
Farrar, CR .
JOURNAL OF SOUND AND VIBRATION, 1999, 224 (02) :359-374
[5]  
HIRANO Y, 1980, B JSME, V23, P732, DOI 10.1299/jsme1958.23.732
[6]   Application of wavelet theory for crack identification in structures [J].
Liew, KM ;
Wang, Q .
JOURNAL OF ENGINEERING MECHANICS, 1998, 124 (02) :152-157
[7]  
LYNN PP, 1967, DEV MECH, V4, P911
[8]   A FINITE-ELEMENT MODEL OF CRACKED PLATES AND APPLICATION TO VIBRATION PROBLEMS [J].
QIAN, GL ;
GU, SN ;
JIANG, JS .
COMPUTERS & STRUCTURES, 1991, 39 (05) :483-487
[9]  
SURACE C, 1994, P SOC PHOTO-OPT INS, V2251, P1141
[10]  
SZILARD R, 1973, THEORY ANAL PLATES