Leaky Rayleigh and Scholte waves at the fluid-solid interface subjected to transient point loading
Leaky Rayleigh and Scholte waves at the fluid-solid interface subjected to transient point loading
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DOI：
10.1121/1.1791718
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发表时间：
2004-10-01
影响因子：
2.4
通讯作者：
Schubert, F
中科院分区：
文献类型：
--
作者：
Zhu, JY;Popovics, JS;Schubert, F
本文对作用在流固界面上的瞬态法向点载荷所产生的声波进行了分析。利用积分变换技术得到了波动的封闭形式精确解。所得到的解析解为实验中优化流体耦合超声声波检测提供了必要的理论依据。数值模拟（弹性动力学有限积分技术）进行验证所获得的解析解。详细描述了泄漏瑞利波和Scholte波的解决方案。本文提出了一种简化的方法来分离瞬态点荷载产生的泄漏Rayleigh波和Scholte波的贡献，并给出了位移和应力分量的封闭形式公式。简化的解决方案相比，精确的解决方案为两种配置：水/混凝土和空气/混凝土。研究了空气/混凝土结构中泄漏瑞利波的激励效应，对土木工程结构中的空气耦合传感具有实际意义。(C)2004年，美国声学学会。
The analysis of acoustic waves generated by a transient normal point load applied on a fluid-solid interface is presented. The closed-form exact solution of the wave motion is obtained by using integral transform techniques. The obtained analytical solution provides necessary theoretical background for optimization of fluid-coupled ultrasonic and acoustic wave detection in experiments. Numerical simulation (elastodynamic finite integration technique) is performed to verify the obtained analytical solution. Detailed descriptions of leaky Rayleigh and Scholte wave solutions are presented. A simplified solution to isolate the contributions of leaky Rayleigh and Scholte waves Generated by a transient point load is proposed, and closed-form formulations for displacement and stress components are then presented. The simplified solution is compared to the exact solution for two configurations: water/concrete and air/concrete. The excitation effectiveness of leaky Rayleigh waves for the air/concrete configuration is studied, which has practical significance to air-coupled sensing in civil engineering structures. (C) 2004 Acoustical Society of America.