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Resonant Phenomena of Circumferential SH Waves Converted from T(0,1) Mode Guided Waves at Non-Axisymmetric Defects

机译:从T(0,1)模式引导波在非轴对称缺陷中转换的圆周SH波的共振现象

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In this paper, propagation behaviors of the T(0,1) mode guided waves at non-axisymmetric defects were considered with the FEM simulations, the theory and the experimental results. It was found that resonances of circumferential (C-) SH waves converted from the T(0,1) mode guided waves at non-axisymmetric defects occurred clearly at the specific frequencies estimated by the theory. The standing waves of the C-SH waves were verified experimentally with the laser vibrometer for detecting the distributions of the particle displacement speed along the girth. The FEM simulations were also underpinned the phenomena. The resonances were confirmed obviously on condition that the C-SH waves formed standing waves along the girth. Conversely, the resonances were not confirmed on condition that the other C-guided wave, namely the C-Lamb waves, formed the standing waves. In addition, the other T(0,1) mode guided waves that were originated from the resonant C-SH waves were confirmed while the resonances occurred.
机译:在本文中,考虑了与FEM模拟,理论和实验结果考虑了非轴对称缺陷处的T(0,1)模式引导波的传播行为。结果发现,从非轴对称缺陷转换的周向(C-)Sh波的共振在理论估计的特定频率下显然发生在非轴对称缺陷处。 C-SH波的驻波通过实验验证了激光振动计,用于检测沿着周长的颗粒位移速度的分布。有组织模拟也受到了这种现象。在C-Sh波沿着周长形成驻波的条件明显地确认了共振。相反,在另一个C引导波,即C-LAMB波,形成驻波的条件下,不确认共振。另外,在发生共振的同时确认来自谐振C-Sh波的另一个T(0,1)模式引导波。

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