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Abstract：
In this article, the practical issues connected with guided wave measurement are studied: (1) the influence of gluing of PZT plate actuators (NAC2013) on generated elastic wave propagation, (2) the repeatability of PZT transducers attachment, and (3) the assessment of the possibility of comparing the results of Laser Doppler Vibrometry (LDV) measurement performed on different 2D samples. The consideration of these questions is crucial in the context of the assessment of the possibility of the application of the guided wave phenomenon to structural health-monitoring systems, e.g., in civil engineering. In the examination, laboratory tests on the web of steel I-section specimens were conducted. The size and shape of the specimens were developed in such a way that they were similar to the elements typically used in civil engineering structures. It was proved that the highest amplitude of the generated wave was obtained when the exciters were glued using wax. The repeatability and durability of this connection type were the weakest. Due to this reason, it was not suitable for practical use outside the laboratory. The permanent glue application gave a stable connection between the exciter and the specimen, but the generated signal had the lowest amplitude. In the paper, the new procedure dedicated to objective analysis and comparison of the elastic waves propagating on the surface of different specimens was proposed. In this procedure, the genetic algorithms help with the determination of a new coordinate system, in which the assessment of the quality of wave propagation in different directions is possible.
摘要：
在这篇文章中,研究了与导波测量相关的实际问题：（1）PZT板执行器（NAC2013）胶合对产生的弹性波传播的影响，（2）PZT传感器附件的可重复性，和（3）评估比较对不同2D样品进行的激光多普勒振动测量（LDV）测量结果的可能性。在评估将导波现象应用于结构健康监测系统的可能性的背景下，考虑这些问题至关重要，例如，在土木工程中。在考试中,在钢I形截面试样的腹板上进行了实验室测试。标本的尺寸和形状的发展方式，使它们类似于土木工程结构中通常使用的元素。事实证明，当使用蜡粘合激发器时，所产生的波的振幅最高。这种连接类型的可重复性和耐久性是最弱的。由于这个原因,它不适合在实验室外实际使用。永久涂胶在激励器和试样之间提供了稳定的连接，但产生的信号振幅最低。在论文中,提出了一种致力于客观分析和比较在不同样品表面传播的弹性波的新方法。在这个过程中，遗传算法有助于确定新的坐标系，其中可以评估不同方向的波传播质量。
