期刊
ULTRASONICS
卷 54, 期 6, 页码 1553-1558出版社
ELSEVIER
DOI: 10.1016/j.ultras.2014.04.009
关键词
Nonlinear ultrasound; Nonlinear guided waves; Higher harmonic generation; Ultrasonics
资金
- Nuclear Energy Universities Program [00102946]
- National Science Foundation [1300562]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1300562] Funding Source: National Science Foundation
Harmonic generation from non-cumulative fundamental symmetric (S-0) and antisymmetric (A(0)) modes in plate is studied from a numerical standpoint. The contribution to harmonic generation from material nonlinearity is shown to be larger than that from geometric nonlinearity. Also, increasing the magnitude of the higher order elastic constants increases the amplitude of second harmonics. Second harmonic generation from non-phase-matched modes illustrates that group velocity matching is not a necessary condition for harmonic generation. Additionally, harmonic generation from primary mode is continuous and once generated, higher harmonics propagate independently. Lastly, the phenomenon of mode-interaction to generate sum and difference frequencies is demonstrated. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据