Numerical Perspective of Second-Harmonic Generation of Circumferential Guided Wave Propagation in a Circular Tube
Numerical Perspective of Second-Harmonic Generation of Circumferential Guided Wave Propagation in a Circular Tube
复制标题
圆管内周向导波传播的二次谐波产生的数值研究
DOI：
10.1088/0256-307x/33/12/124301
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发表时间：
2016
影响因子：
3.5
通讯作者：
Xiang Yan-Xun
中科院分区：
文献类型：
--
作者：
Li Ming-Liang;Deng Ming-Xi;Zhu Wu-Jun;Gao Guang-Jian;Xiang Yan-Xun
从数值的角度研究了一次（基波）周向导波（CGW）传播对二次谐波产生的影响。为了使主CGW模式的二次谐波能够沿周向方向沿着累积，选择适当的主和倍频CGW的模式对。有限元模拟和评估的非线性CGW传播进行了分析所选择的CGW模式对。数值模拟结果表明，在特定的驱动频率下，倍频响应完全由满足相速度匹配条件的CGW主模产生，且CGW主模的二次谐波随周向角的变化具有累积效应.获得的数值透视产生洞察到复杂的物理过程中的初级CGW传播不可用的倍频。
The effect of second-harmonic generation (SHG) by primary (fundamental) circumferential guided wave (CGW) propagation is investigated from a numerical standpoint. To enable that the second harmonic of the primary CGW mode can accumulate along the circumferential direction, an appropriate mode pair of primary and double frequency CGWs is chosen. Finite element simulations and evaluations of nonlinear CGW propagation are analyzed for the selected CGW mode pair. The numerical simulations performed directly demonstrate that the response of SHG is completely generated by the desired primary CGW mode that satisfies the condition of phase velocity matching at a specific driving frequency, and that the second harmonic of the primary CGW mode does have a cumulative effect with circumferential angles. The numerical perspective obtained yields an insight into the complicated physical process of SHG of primary CGW propagation unavailable previously.