The existence of surface shear waves in a finitely conducting magneto-elastic half-space

1999 ◽  
Vol 10 (5) ◽  
pp. 381-389
Author(s):  
Manidipa Chattopadhyay ◽  
S.K. Chakraborty ◽  
Sarbani Chakraborty
Keyword(s):  
Half Space ◽  
Shear Waves ◽  
Elastic Half Space ◽  
Surface Shear

scholarly journals Shear Wave Propagation in Multilayered Medium including an Irregular Fluid Saturated Porous Stratum with Rigid Boundary

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Ravinder Kumar ◽  
Dinesh Kumar Madan ◽  
Jitander Singh Sikka
Keyword(s):  
Phase Velocity ◽  
Half Space ◽  
Perturbation Technique ◽  
Shear Waves ◽  
Elastic Half Space ◽  
Wave Number ◽  
Anisotropic Fluid ◽  
Homogeneous Layer ◽  
Dimensionless Wave Number ◽  
Rigid Boundary

The present investigation is concerned with the study of propagation of shear waves in an anisotropic fluid saturated porous layer over a semi-infinite homogeneous elastic half-space lying under an elastic homogeneous layer with irregularity present at the interface with rigid boundary. The rectangular irregularity has been taken in the half-space. The dispersion equation for shear waves is derived by using the perturbation technique followed by Fourier transformation. Numerically, the effect of irregularity present is analysed. It is seen that the phase velocity is significantly influenced by the wave number and the depth of the irregularity. The variations of dimensionless phase velocity against dimensionless wave number are shown graphically for the different size of rectangular irregularities with the help of MATLAB.

The efficiency of application of virtual cross-sections method and hypotheses MELS in problems of wave signal propagation in elastic waveguides with rough surfaces

2016 ◽  
pp. 3564-3575 ◽  
Author(s):  
Ara Sergey Avetisyan
Keyword(s):  
Half Space ◽  
Cross Sections ◽  
Classical Method ◽  
Signal Propagation ◽  
Elastic Half Space ◽  
Layered Systems ◽  
Surface Layers ◽  
Inhomogeneous Surface ◽  
Wave Signal ◽  
The Impact

The efficiency of virtual cross sections method and MELS (Magneto Elastic Layered Systems) hypotheses application is shown on model problem about distribution of wave field in thin surface layers of waveguide when plane wave signal is propagating in it. The impact of surface non-smoothness on characteristics of propagation of high-frequency horizontally polarized wave signal in isotropic elastic half-space is studied. It is shown that the non-smoothness leads to strong distortion of the wave signal over the waveguide thickness and along wave signal propagation direction as well.  Numerical comparative analysis of change in amplitude and phase characteristics of obtained wave fields against roughness of weakly inhomogeneous surface of homogeneous elastic half-space surface is done by classical method and by proposed approach for different kind of non-smoothness.

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