摘要
将连续小波变换识别裂纹的基本原理运用于圆柱壳的损伤识别研究,利用sym4小波对含裂纹圆柱壳的前四阶振型信息进行多分辨率分析以及连续小波变换,能够准确地识别出裂纹的位置;考虑到实测信号往往是含噪声信号,进一步研究了噪声对识别结果的影响。通过数值算例验证了其可靠性,表明此方法在圆柱壳结构损伤诊断中具有一定的应用价值。
The fundamental principle of crack identification based on continuous wavelet transform was applied to the spatial-frequency analysis of the cracked cantilever cylindrical shell structures. The crack position can be detected exactly by multi-resolution analysis and continuous wavelet transform of the first four mode shapes in spatial domain using sym4 wavelet transform, and the effect of noise to the results of recognition was studied. The simulation results illustrated its dependability, and indicated the method can provide reference for practical application.
出处
《太原理工大学学报》
CAS
北大核心
2011年第4期437-441,共5页
Journal of Taiyuan University of Technology
基金
山西省优秀青年学术带头人项目
关键词
损伤识别
裂纹
小波变换
圆柱壳
damage detection
crack
wavelet transform
cylindrical shell
