A Comparative Study on Structural Damage Detection Using Derivatives of Laser-Measured Flexural and Longitudinal Vibration Shapes
A Comparative Study on Structural Damage Detection Using Derivatives of Laser-Measured Flexural and Longitudinal Vibration Shapes
复制标题
使用激光测量的弯曲和纵向振动形状的导数进行结构损伤检测的比较研究
DOI：
10.1007/s10921-020-00702-4
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发表时间：
2020-07
影响因子：
2.8
通讯作者：
Cao Maosen
中科院分区：
文献类型：
--
作者：
Xu Wei;Zhu Weidong;Xu Yongfeng;Cao Maosen
基于激光振型的结构损伤检测方法已成为近十年来的研究热点。对于具有减小的横截面尺寸的梁/杆中的损伤，例如缺口，其导致损伤区域中的弯曲刚度和轴向刚度的变化。这种刚度变化可以引起弯曲和纵向振动形状的导数的不连续性，从而可以检测和定位损伤。弯曲振型导数已被广泛应用于结构损伤检测，而纵向振型导数最近被提出用于结构损伤检测，并没有引起太多的关注。虽然很难激发和测量纵向振动，但它可以用于检测电缆等结构中的损伤，因为电缆的弯曲振动主要由其张力而不是其弯曲刚度决定。在这项研究中，激光测量的弯曲和纵向振动形状的导数在结构损伤检测的能力进行了全面的比较。特别是，为了克服它们易受环境噪声干扰的共同缺点，基于小波变换的多尺度分析被集成到振动形状的导数，以提高其对噪声干扰的鲁棒性。分析和实验验证表明，与常用的弯曲振型导数相比，纵向振型导数在检测梁/杆类结构构件损伤方面具有相同的能力。
Structural damage detection methods relying on laser-measured vibration shapes have become a research focus in the past decade. For damage in a beam/bar with reduced cross-sectional dimensions, such as a notch, it causes changes in both its bending stiffness and axial stiffness in the damage region. Such stiffness changes can induce discontinuities in derivatives of flexural and longitudinal vibration shapes, whereby the damage can be detected and located. Derivatives of flexural vibration shapes have been widely used for structural damage detection, whereas derivatives of longitudinal vibration shapes were recently proposed for structural damage detection and have attracted much less attention. Although it is difficult to excite and measure longitudinal vibration, it can be useful for detecting damage in such a structure as a cable, since flexural vibration of the cable is mainly governed by its tension and not its bending stiffness. In this study, capabilities of derivatives of laser-measured flexural and longitudinal vibration shapes in structural damage detection are comprehensively compared. In particular, to overcome their common deficiency of being susceptible to environmental noise interference, the multiscale analysis based on wavelet transform is integrated into derivatives of vibration shapes to enhance their robustness against noise interference. Analytical and experimental validation shows that compared with commonly used derivatives of flexural vibration shapes, derivatives of longitudinal vibration shapes have the same capability in detecting damage in beam/bar-type structural components.
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影响因子：
1.5
作者：
P. Pawar;R. Ganguli
通讯作者：
P. Pawar;R. Ganguli
影响因子：
2
作者：
Singiresu S. Rao
通讯作者：
Singiresu S. Rao
DOI：
10.1016/b978-0-12-466606-1.x5000-4
发表时间：
1998
期刊：
--
影响因子：
--
作者：
S. Mallat
通讯作者：
S. Mallat
影响因子：
3.6
作者：
Quan Wang;X. Deng
通讯作者：
Quan Wang;X. Deng
DOI：
--
发表时间：
2004
期刊：
--
影响因子：
--
作者：
E. Sazonov;P. Klinkhachorn
通讯作者：
E. Sazonov;P. Klinkhachorn