期刊名称：International Journal of Signal Processing, Image Processing and Pattern Recognition
印刷版ISSN：2005-4254
出版年度：2016
卷号：9
期号：10
页码：345-352
出版社：SERSC
摘要：In order to locate damage posotion and quantify damage degree of transmission tower, the method of damage identificationof transmission tower based on flexibility matrix and signaltermamplitude vector was proposed,by combining flexibility matrix method of damage identificationand time-frequency analysis method of domain vibration signal. Firstly, the coefficient equation about modal parameters and damage parameters was established, according to the linear relationship between flexibility matrix elements and structure parameters.Then, by Wigner-Ville Distribution (WVD) signaltermanalytical deduction of free vibration response of the damping structure, the responding function relation between signaltermamplitude and model parameters was founded. Finally, the coefficient equation was solved by substituting mode shape vector with signaltermamplitude vector, avoiding thestructuralmodal parametersidentification, the damage location and extent of transmission tower was detected once and for all.The numerical example analysis of single tower model and tower-line systemshows that, the proposed methodwith good anti-noise performancecan accurately detectthe extentof single or multiple damageof current structureby a single measurement.
