This research proposes a correlation coefficient for detecting and evaluating defects in beams, which brings about a positive outcome in terms of accuracy and efficiency. This parameter surpasses other parameters, such as natural frequency and damping coefficient, thanks to its sensitivity to structural changes. Our results show that although the damping coefficient had more variation than the natural frequency value in the same experiment, its changes were insufficient and unstable at different levels of defects. In addition, the proposed correlation coefficient parameter has a linear characteristic and always changes significantly according to increasing levels of defects. The results outweigh damping coefficient and natural frequency values. Furthermore, this value is always sensitive to measurement channels, which could be an important factor in locating defects in beams. The testing index is statistically evaluated by a normal distribution of the amplitude value of vibration measurement signals. Changes and shifts in this distribution are the basis for evaluating beam defects. Thus, the suggested parameter is a reliable alternative for assessing the defects of a structure.

中文翻译：

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用相关系数检测和评估梁中的缺陷

这项研究提出了一种相关系数，用于检测和评估光束中的缺陷，从而在准确性和效率方面带来了积极的成果。由于其对结构变化的敏感性，该参数超过了其他参数，例如固有频率和阻尼系数。我们的结果表明，尽管在同一实验中阻尼系数的变化幅度大于自然频率值，但在不同缺陷水平下，阻尼变化幅度不足且不稳定。另外，所提出的相关系数参数具有线性特征，并且总是随着缺陷水平的增加而显着变化。结果超过了阻尼系数和固有频率值。此外，此值始终对测量通道敏感，这可能是定位光束缺陷的重要因素。通过振动测量信号的振幅值的正态分布来统计评估测试指标。这种分布的变化和变化是评估光束缺陷的基础。因此，建议的参数是评估结构缺陷的可靠替代方法。