School of Engineering and Computing Sciences, Durham University, Durham DH1 3LE, United Kingdom.
J Acoust Soc Am. 2011 Jul;130(1):EL44-9. doi: 10.1121/1.3601883.
This paper considers the propagation of Stoneley modes along the interfaces of three-layered concentric cylindrical solid media in order to assist in the design of ultrasonic transmission rods. The phase velocity dispersion curves and amplitude distributions are numerically analyzed. The modes are analogous to non-dispersive Stoneley waves and are confined to the vicinities of the two interfaces at high frequency. A key finding is that the peak amplitude location for each mode transfers between the two interfaces as a function of frequency. A simplified model is introduced, giving the peak amplitude locations of each mode in different frequency ranges efficiently.
本文研究了沿三层同心圆柱固体介质界面传播的斯通利波模式，以辅助超声传输杆的设计。通过数值分析了相速度频散曲线和振幅分布。这些模式类似于非频散斯通利波，在高频下局限于两个界面附近。一个关键发现是，每个模式的峰值振幅位置随频率在两个界面之间转移。引入了一个简化模型，有效地给出了不同频率范围内每个模式的峰值振幅位置。
