板自由边斜入射兰姆波的反射。

Reflection of Lamb waves obliquely incident on the free edge of a plate.

机构信息

Mechanical Engineering Department, Villanova University, Villanova, PA 19085, USA.

出版信息

Ultrasonics. 2013 Jan;53(1):271-82. doi: 10.1016/j.ultras.2012.06.011. Epub 2012 Jul 7.

DOI:10.1016/j.ultras.2012.06.011

Abstract

The reflection of obliquely incident symmetric and anti-symmetric Lamb wave modes at the edge of a plate is studied. Both in-plane and Shear-Horizontal (SH) reflected wave modes are spawned by an obliquely incident in-plane Lamb wave mode. Energy reflection coefficients are calculated for the reflected wave modes as a function of frequency and angle of incidence. This is done by using the method of orthogonal mode decomposition and by enforcing traction free conditions at the plate edge using the method of collocation. A PZT sensor network, affixed to an Aluminum plate, is used to experimentally verify the predictions of the analysis. Experimental results provide support for the analytically determined results.

摘要

研究了板边缘处倾斜入射对称和反对称 Lamb 波模式的反射。平面内和剪切水平（SH）反射波模式都是由倾斜入射平面内 Lamb 波模式产生的。通过使用正交模式分解的方法，并通过使用配置方法在板边缘施加无牵引力条件，计算了反射波模式的能量反射系数作为频率和入射角的函数。一个附在铝板上的 PZT 传感器网络被用来实验验证分析的预测。实验结果为分析确定的结果提供了支持。