Rayleigh Wave Propagation for the Detection of Near Surface Discontinuities: Finite Element Modeling

被引：0
作者：
A. Zerwer
M. A. Polak
J. C. Santamarina
机构：
[1] Geotechnical Specialist,Department of Civil Engineering
[2] Trow Consulting Engineers,Department of Civil and Environmental Engineering
[3] University of Waterloo,undefined
[4] Georgia Institute of Technology,undefined
来源：
Journal of Nondestructive Evaluation | 2003年 / 22卷
关键词：
Rayleigh waves; Lamb waves; finite elements; defect dimension; mode shapes; plates;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The paper presents a finite element study designed to gain physical insight into the effect of surface discontinuities on Rayleigh wave propagation in structural elements. In particular, a series of array measurements at various locations within a plate are simulated and compared with experimental measurements. Conversion of array measurements into the frequency-wavenumber domain reveals propagating Lamb modes, which are used to define Rayleigh wave motion. Numerical results show that Rayleigh waves measured after passing a fracture are composed of long wavelength Rayleigh wave energy propagating past the slot and short wavelength Rayleigh wave energy formed behind the slot.
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页码：39 / 52
页数：13
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