基于曲率模态小波分析的单塔斜拉桥损伤识别  

Damage Identification of Single Tower Cable-stayed Bridge Based on Wavelet Analysis of Curvature Mode

作　　者：管德清[1] 施立成[1] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410076

出　　处：《建筑科学与工程学报》2010年第1期21-24,42,共5页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(50578018);湖南省优秀博士论文科研基金项目(2007)

摘　　要：基于曲率模态小波分析原理及有限元法分析了含有损伤单元的单塔斜拉桥的振动特性;以Mexh小波为母小波,通过对损伤斜拉桥的曲率模态做连续小波变换,由小波系数模极大值位置识别斜拉桥损伤的位置,建立了一种基于曲率模态小波分析识别斜拉桥损伤的方法;采用该方法对单塔斜拉桥的损伤识别进行了计算分析。结果表明:该方法具有有效性,对于各类型桥的损伤诊断具有指导意义。Based on the wavelet analysis theory and finite element method, the damage identification method of the curvature modes for beams was presented. The model of finite element method for the single tower cable-stayed bridge was established. The vibration characteristics of beam could be obtained by means of finite element analysis. The curvature modes were analyzed using continuous wavelet transform by Mexh wavelet on multiple scales, and the position of the crack could be identified by the modulus maximum of the wavelet coefficients. A damage identification method based on wavelet analysis of curvature mode was built, which was applied to single tower cable-stayed bridge. The results show that the method is available and can provide reference for damage identification in different bridges.

关 键 词：曲率模态 小波分析 单塔斜拉桥 有限元法 损伤识别 

分 类 号：TU317[建筑科学—结构工程]