A NOVEL WAVELET CONDITION INDEX ON DAMAGE DIAGNOSIS IN BEAMS
In this study, a novel structural condition index, wavelet transform modulus maxima (WTMM) of the dyadic discrete wavelet transform (DDWT) of structural fundamental vibration mode, is proposed to diagnose the location and severity of damage in beams. Firstly, the damage location is determined by the WTMM distributed in the wavelet details of fundamental vibration mode due to the intrinsic relationship between WTMM and function singularity; secondly, the WTMM severed as a structural condition index in conjunction with BP neural networks are used to establish an intelligent vibration mode to automatically identify damage severity. The proposed structural condition index as well as the damage diagnosis strategy is validated in a numerical simulation experiment on a damage diagnosis in a simply-supported beam, and the results show that the structural condition index is sensitive to structural damage but insensitive to environmental noise, and therefore it is advantageous over some traditional structural condition indices.
Ying Qiu Maosen CAO
College of Civil Engineering & Architecture, Guangxi University , Nanning 530004, China College of Civil Engineering, Hohai University, Nanjing 210098, China;College of Hydraulic & Civil E
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）