Comparison of experimental and theoretical resonance curves in foundation modeling according to the elastic half-space theory

1970 ◽  
Vol 7 (6) ◽  
pp. 387-393
Author(s):  
V. Ya. Rudnik
Keyword(s):  
Half Space ◽  
Elastic Half Space ◽  
Space Theory ◽  
Resonance Curves

The Study on Portable Falling Weight Deflectometer Based on the Elastic Half-Space Theory

2011 ◽  
Vol 97-98 ◽  
pp. 156-161
Author(s):  
De Cheng Feng ◽  
Wen Xin Zuo ◽  
Yin Zhao ◽  
Peng Cao
Keyword(s):  
Half Space ◽  
Integral Transform ◽  
Elastic Half Space ◽  
Space Theory ◽  
Falling Weight Deflectometer ◽  
Empirical Formulas ◽  
Foreign Countries ◽  
Back Calculation ◽  
Boussinesq Solution ◽  
Falling Weight

As a quick, accurate and efficient inspecting equipment, the Portable Falling Weight Deflectometer (PFWD) is widely used in subgrade modulus evaluation in the foreign countries. However, most analysis methods used in the modulus back calculation of PFWD is based on the classical Boussinesq solution or empirical formulas, which could hardly reflect the resilient of subgrade accurately. In this paper, the elastic half-space theory is introduced into the analysis of modulus back calculation, and with the integral transform and the numerical analysis, this paper provides an approximate method to evaluate the elastic modulus of subgrade.

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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