Equivalent boundary conditions for thin orthotropic layer between two solids: Reflection, refraction, and interface waves

1992 ◽  
Vol 91 (4) ◽  
pp. 1875-1887 ◽  
Author(s):  
S. I. Rokhlin ◽  
Y. J. Wang
Keyword(s):  
Boundary Conditions ◽  
Orthotropic Layer ◽  
Interface Waves ◽  
Equivalent Boundary

Shear Horizontal Waves in Orthotropic Layer/Piezoelectric Cylinder Structures

2014 ◽  
Vol 905 ◽  
pp. 105-108 ◽  
Author(s):  
Xing Zhao ◽  
Hong Jun Wang
Keyword(s):  
Boundary Conditions ◽  
Bessel Function ◽  
Piezoelectric Materials ◽  
Interface Conditions ◽  
Dispersion Characteristics ◽  
Orthotropic Layer ◽  
Sh Waves ◽  
Numerical Examples ◽  
Piezoelectric Cylinder ◽  
Shear Horizontal

This paper investigates the dispersion characteristics of shear horizontal waves propagating in a piezoelectric cylinder covered by orthotropic layer. The surface of the orthotropic layer is assumed to be mechanically free; The stress and displacement at the interface is continuous. The solution of the equation is expressed by Bessel function, and the dispersion equation is derived by using the boundary conditions and the interface conditions, the numerical examples are provided to show the influences of the orthotropic degree and the properties of piezoelectric materials on the dispersion characteristics of SH waves.

scholarly journals Equivalent Boundary Conditions for Heterogeneous Acoustic Media

2014 ◽  
Vol 15 (3) ◽  
pp. 301
Author(s):  
Manuela Longoni De Castro ◽  
Julien Diaz ◽  
Victor Perón
Keyword(s):  
Boundary Conditions ◽  
Seismic Waves ◽  
Heterogeneous Media ◽  
Absorbing Boundary Conditions ◽  
Computational Domain ◽  
Absorbing Boundary ◽  
Equivalent Boundary ◽  
Artificial Boundaries ◽  
Acoustic Media ◽  
Propagation Of Waves

In this work, we have worked on possibilities to model artificial boundaries needed in the simulation of wave propagation in acoustic heterogeneous media.  Our motivation is to restrict the computational domain in the simulation of seismic waves that are propagated from the earth and transmitted to the stratified heterogeneous media composed by ocean and atmosphere. Two possibilities were studied and compared in computational tests: the use of absorbing boundary conditions on an artificial boundary in the atmosphere layer and the elimination of the atmosphere layer using an equivalent boundary condition that mimics the propagation of waves through the atmosphere. <br />

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