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首页> 外文期刊>Journal of Theoretical and Applied Mechanics >SELECTED PROBLEMS OF DAMAGE DETECTION IN INTERNALLY SUPPORTED PLATES USING ONE-DIMENSIONAL DISCRETE WAVELET TRANSFORM
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SELECTED PROBLEMS OF DAMAGE DETECTION IN INTERNALLY SUPPORTED PLATES USING ONE-DIMENSIONAL DISCRETE WAVELET TRANSFORM

机译：使用一维离散小波变换的内部支撑板损伤检测的选定问题

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The paper is concerned with damage detection in plates while using the Discrete Wavelet Transform (DWT). Rectangular plate structures resting on a Winkler or elastic half-space type foundation, with free boundaries are examined. Plate bending is described and solved by the Boundary Element Method in a direct approach. Defects are introduced by additional edges forming slots in relation to the basic plate domain. Numerical investigation is conducted basing on signal analysis of the structural static response and by taking advantage of multi-resolution analysis (MRA) of the signal function which can be represented in a multi-scale manner. The obtained signal is decomposed with the use of Daubechies or Coiflet wavelet families. The white noise generator is used to model measurement inaccuracy which is an inevitable element of a real experiment. The efficiency of DWT of the contaminated signal in damage detection is studied.
机译：本文涉及使用离散小波变换（DWT）时板中的损伤检测。检查放置在Winkler或弹性半空间类型基础上并具有自由边界的矩形板结构。板弯曲是通过边界元法直接描述和解决的。缺陷由相对于基础板区域形成槽的附加边缘引入。基于对结构静态响应的信号分析并利用信号功能的多分辨率分析（MRA）进行数值研究，该功能可以以多尺度的方式表示。使用Daubechies或Coiflet小波族对获得的信号进行分解。白噪声发生器用于对测量误差进行建模，这是实际实验中不可避免的要素。研究了污染信号的DWT在损伤检测中的效率。

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