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Structural damage detection using residual forces based on wavelet transform

机译：基于小波变换的残余力检测结构损伤

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摘要

This study attempts to develop a wavelet-based method, which not only localizes multiple damage sites but also provides information on when damage occurs. By performing wavelet transform of free vibration responses of structures in the damaged state, a residual wavelet force (RWF) is defined. The damage locations and the moments when damage occurs are easily determined simultaneously by the ridges in the RWF. A damage location indicator, DURWF, is also presented. The degrees-of-freedom that have large magnitudes in DLIRWF are associated with the potential damage members within the structure. Furthermore, the natural excitation technique is introduced to generalize the proposed method to the cases of ambient vibration. The proposed method has been demonstrated by numerical simulations of a 20-story shear building and a 5-story, 1-bay × 2-bay steel-frame structure.
机译：这项研究试图开发一种基于小波的方法，该方法不仅可以定位多个损伤部位，还可以提供有关何时发生损伤的信息。通过对受损状态下结构的自由振动响应进行小波变换，定义了残余小波力（RWF）。通过RWF中的凸脊可以轻松轻松地确定损坏的位置和发生时刻。还显示了损坏位置指示器DURWF。 DLIRWF中具有较大量级的自由度与结构中的潜在损坏成员相关。此外，引入自然激励技术以将所提出的方法推广到环境振动的情况。通过对20层剪力建筑物和5层1格×2格钢框架结构的数值模拟，证明了该方法的有效性。

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  • 来源
    《Mechanical systems and signal processing》 |2010年第1期|224-239|共16页
  • 作者

    Guirong Yan; Zhongdong Duan; Jinping Ou; Alessandro De Stefano;

  • 作者单位

    School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China Department of Structural and Geotechnical Engineering, Polytechnic University of Turin, Turin 10129, Italy;

    School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;

    School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;

    Department of Structural and Geotechnical Engineering, Polytechnic University of Turin, Turin 10129, Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    damage detection; wavelet transform; ambient vibration;

    机译：损坏检测;小波变换环境振动;

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