Crack Detection in Pipe Structures by Lifting Wavelet Finite Element Method

摘要：

Due to the fact that near a crack singularity,gradients of the solution are large and are also subject to abrupt changes,so that the solution cannot locally be accurately approximated by a piecewise polynomial function on a quasi-uniform mesh.Lifting wavelet finite element has good ability in modal analysis for singularity problems like a cracked pipe.The first three natural frequencies of the cracked pipe were solved with lifting wavelet finite element,and the database for crack diagnosis was obtained.The first three measured natural frequencies were employed as inputs and the intersection of the three frequencies contour lines predicted the normalized crack location and size.The experimental examples denote the method is of higher identification precision.

关键词： crack lifting wavelet finite element fault diagnosis

作者: Chen Xuefeng Li Bing He Zhengjia

作者单位: State Key Lab.for Manufacturing Systems Engineering,Xian Jiaotong University,Xian 710049,PRC

会议类型: 国际会议

会议名称: The 8th International Conference on Damage Assessment of Structures(DAMAS 2009)(第八届结构损伤评价国际学术会议)

会议地点: 北京

会议语种:英文

页码: 143-150

在线出版日期: 2009-08-03（万方平台首次上网日期，不代表论文的发表时间）