Propagation characteristics of circumferential feature guided waves propagation in a revolved topological waveguide

IF 2.1 3区物理与天体物理 Q2 ACOUSTICS Wave Motion Pub Date : 2024-02-28 DOI:10.1016/j.wavemoti.2024.103309

Xinyi Yuan , Weibin Li , Mingxi Deng

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Abstract

In our previous research, propagation characteristics and combined harmonic generation of feature guided waves (FGWs) in welded joints of plate structure, were analyzed theoretically and observed numerically. Circumferential ultrasonic guided waves find extensive applications in assessing rotating structures, highlighting the importance of investigating the propagation characteristics of circumferential feature guided waves (CFGWs) in such revolved topological waveguides. In this study, propagation characteristics of CFGW in revolved topological waveguides are investigated. Semi-analytical finite element (SAFE) method in conjunction with a perfectly matched layer (PML) within a cylindrical coordinate system is used to explore the modal and dispersion characteristics of CFGWs. Second-harmonic generation (SHG) of CFGWs is further analyzed and discussed both in theoretical and numerical manner. Cumulative SHG of selected CFGW mode pairs, propagation in the welded joint of the revolved topological waveguide, is observed successfully. The obtained results demonstrate that the energy trapping effect of CFGWs in the welded joint of revolved topological waveguide amplifies the generation of cumulative second harmonics, thereby enhancing the measurability of SHG of CFGW. This investigation reveals the potential of damage assessment in revolved topological waveguides by CFGWs.

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圆周特征导波在旋转拓扑波导中的传播特性

我们之前的研究从理论上分析了特征导波（FGWs）在板结构焊接接头中的传播特性和组合谐波生成，并进行了数值观测。圆周超声波导波在评估旋转结构中有着广泛的应用，因此研究圆周特征导波（CFGWs）在此类旋转拓扑波导中的传播特性非常重要。本研究探讨了周向特征导波在旋转拓扑波导中的传播特性。半解析有限元（SAFE）方法与圆柱坐标系内的完全匹配层（PML）相结合，用于探索 CFGW 的模态和频散特性。理论和数值方法对 CFGW 的二次谐波发生（SHG）进行了进一步分析和讨论。成功观测了选定 CFGW 模对的累积 SHG，它在旋转拓扑波导的焊接点中传播。结果表明，在旋转拓扑波导的焊接点中，CFGW 的能量捕获效应放大了累积二次谐波的产生，从而提高了 CFGW SHG 的可测量性。这项研究揭示了利用 CFGW 评估旋转拓扑波导损伤的潜力。

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来源期刊

Wave Motion 物理-力学

CiteScore

4.10

自引率

8.30%

发文量

118

审稿时长

3 months

期刊介绍： Wave Motion is devoted to the cross fertilization of ideas, and to stimulating interaction between workers in various research areas in which wave propagation phenomena play a dominant role. The description and analysis of wave propagation phenomena provides a unifying thread connecting diverse areas of engineering and the physical sciences such as acoustics, optics, geophysics, seismology, electromagnetic theory, solid and fluid mechanics. The journal publishes papers on analytical, numerical and experimental methods. Papers that address fundamentally new topics in wave phenomena or develop wave propagation methods for solving direct and inverse problems are of interest to the journal.

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