Effect of Constant Energy Source on Coherence Function in Spectral Analysis of Surface Waves (SASW) Testing

2018 ◽  
pp. 59-65
Author(s):  
Sayantan Chakraborty ◽  
Tejo V. Bheemasetti ◽  
Anand J. Puppala
Keyword(s):  
Energy Source ◽  
Spectral Analysis ◽  
Surface Waves ◽  
Coherence Function ◽  
Constant Energy

scholarly journals Implementation of Machine Learning Algorithms in Spectral Analysis of Surface Waves (SASW) Inversion

2021 ◽  
Vol 11 (6) ◽  
pp. 2557
Author(s):  
Sadia Mannan Mitu ◽  
Norinah Abd. Rahman ◽  
Khairul Anuar Mohd Nayan ◽  
Mohd Asyraf Zulkifley ◽  
Sri Atmaja P. Rosyidi
Keyword(s):  
Spectral Analysis ◽  
Surface Waves ◽  
Soil Profile ◽  
Field Tests ◽  
Iteration Process ◽  
Machine Learning Algorithms ◽  
Support Vector ◽  
Complex Processes ◽  
Inversion Procedure ◽  
Inversion Analysis

One of the complex processes in spectral analysis of surface waves (SASW) data analysis is the inversion procedure. An initial soil profile needs to be assumed at the beginning of the inversion analysis, which involves calculating the theoretical dispersion curve. If the assumption of the starting soil profile model is not reasonably close, the iteration process might lead to nonconvergence or take too long to be converged. Automating the inversion procedure will allow us to evaluate the soil stiffness properties conveniently and rapidly by means of the SASW method. Multilayer perceptron (MLP), random forest (RF), support vector regression (SVR), and linear regression (LR) algorithms were implemented in order to automate the inversion. For this purpose, the dispersion curves obtained from 50 field tests were used as input data for all of the algorithms. The results illustrated that SVR algorithms could potentially be used to estimate the shear wave velocity of soil.

Spectral analysis of surface waves for non-destructive evaluation of historic masonry buildings

2021 ◽  
Vol 52 ◽  
pp. 31-37
Author(s):  
Fernando Martínez-Soto ◽  
Fernando Ávila ◽  
Esther Puertas ◽  
Rafael Gallego
Keyword(s):  
Spectral Analysis ◽  
Surface Waves ◽  
Masonry Buildings ◽  
Historic Masonry ◽  
Non Destructive Evaluation ◽  
Non Destructive

Application of the Coupled Local Minimizers Method to the Optimization Problem in the Spectral Analysis of Surface Waves Method

2008 ◽  
Vol 134 (10) ◽  
pp. 1541-1553 ◽  
Author(s):  
Geert Degrande ◽  
Sayed Ali Badsar ◽  
Geert Lombaert ◽  
Mattias Schevenels ◽  
Anne Teughels
Keyword(s):  
Spectral Analysis ◽  
Surface Waves ◽  
Optimization Problem ◽  
Local Minimizers

Effectiveness of Spectral Analysis of Surface Waves (SASW) method for pavement evaluation

2017 ◽  
pp. 631-636 ◽  
Author(s):  
Andreas Loizos ◽  
Christina Plati ◽  
Brad Cliatt ◽  
Konstantinos Gkyrtis
Keyword(s):  
Spectral Analysis ◽  
Surface Waves ◽  
Pavement Evaluation

Underwater Application of Spectral Analysis of Surface Waves

2006 ◽  
Author(s):  
L. Paoletti ◽  
E. Mouton ◽  
M. Maraschini
Keyword(s):  
Spectral Analysis ◽  
Surface Waves ◽  
Underwater Application

Use of Constant Energy Source in SASW Test and Its Influence on Seismic Response Analysis

2018 ◽  
Vol 41 (6) ◽  
pp. 20170220 ◽  
Author(s):  
Sayantan Chakraborty ◽  
Tejo V. Bheemasetti ◽  
Anand J. Puppala ◽  
Louie Verreault
Keyword(s):  
Energy Source ◽  
Seismic Response ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Constant Energy

scholarly journals Difficulties with phase spectrum unwrapping in spectral analysis of surface waves nondestructive testing of pavements

1992 ◽  
Vol 29 (3) ◽  
pp. 506-511 ◽  
Author(s):  
M. O. Al-Hunaidi
Keyword(s):  
Spectral Analysis ◽  
Nondestructive Testing ◽  
Surface Waves ◽  
Phase Spectrum ◽  
Correction Procedure ◽  
Near Surface ◽  
Surface Profiling ◽  
Usual Procedure

Spectral analysis of surface waves (SASW) is a nondestructive and in situ method for determining the stiffness profiles of soil and pavement sites. This method involves the generation and measurement of surface Rayleigh waves. By exploiting the dispersive characteristic of these waves in layered systems, the SASW method provides information on the variation of stiffness with depth. This paper presents the results of a case study for near-surface profiling of a pavement site using the SASW method. In this study, inconsistencies were observed in the dispersion curve of the site when the usual procedure of unfolding the relative phase spectrum was followed. A correction procedure to eliminate these inconsistencies is suggested and discussed. The thickness and wave velocities of the various layers obtained with the SASW method, after applying the correction procedure, matched closely those determined from cored samples and cross-hole tests. Key words : nondestructive testing, pavement, layered media, Rayleigh wave, spectral analysis, shear wave velocity, wave propagation.

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