IDENTIFICATION OF PIPE CRACK BASED ON SECOND-GENERATION WAVELET FINITE ELEMENT METHOD
A model-based crack identification method is proposed for estimating crack location and size of a pipe with an open crack by using second-generation wavelet (SGW) finite element method. First, the first three frequencies of the pipe with various crack locations and sizes are accurately obtained. The frequency influencing functions of crack location and size are approximated by means of surface-fitting techniques. Then the first three measured natural frequencies are employed as inputs of the functions. The intersection of the three frequencies contour lines predicts crack location and size. The efficiency of this method is verified by experimental examples. The method can be applied to prognosis and quantitative diagnosis of incipient cracks.
Second-generation wavelets Crack Quantitative identification Finite element method
Junjie Ye Yumin He Xuefeng Chen Zhengjia He
School of Mechanical Engineering, The State Key Laboratory for Manufacturing Systems Engineering, Xi′an Jiaotong University, Xi′an 710049, P.R.C.
国际会议
北京
英文
1868-1873
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）