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Structural Engineering and Mechanics   Volume 39, Number 1, July10 2011, pages 77-91
DOI: https://doi.org/10.12989/sem.2011.39.1.077
 
Study on damage detection software of beam-like structures
Jiawei Xiang, Zhansi Jiang, Yanxue Wang and Xuefeng Chen

 
Abstract     [Buy Article]
    A simply structural damage detection software is developed to identification damage in beams. According to linear fracture mechanics theory, the localized additional flexibility in damage vicinity can be represented by a lumped parameter element. The damaged beam is modeled by waveletbased elements to gain the first three frequencies precisely. The first three frequencies influencing functions of damage location and depth are approximated by means of surface-fitting techniques to gain damage detection database of forward problem. Then the first three measured natural frequencies are employed as inputs to solve inverse problem and the intersection of the three frequencies contour lines predict the damage location and depth. The DLL (Dynamic Linkable Library) file of damage detection method is coded by C++ and the corresponding interface of software is coded by virtual instrument software LabVIEW. Finally, the software is tested on beams and shafts in engineering. It is shown that the presented software can be used in actual engineering structures.
 
Key Words
    damage detection; wavelet finite element method; LabVIEW; software
 
Address
Jiawei Xiang: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, 541004, P.R. China; State Key Laboratory for Manufacturing Systems Engineering, Xi\'an Jiaotong University, Xi\'an 710049, P.R. China
Zhansi Jiang and Yanxue Wang: School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, 541004, P.R. China
Xuefeng Chen: State Key Laboratory for Manufacturing Systems Engineering, Xi\'an Jiaotong University, Xi\'an 710049, P.R. China
 

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