A simulation-based approach for railway applications using GPR

Benedetto, Andrea, Tosti, Fabio, Bianchini Ciampoli, Luca, Pajewski, Lara, Pirrone, Daniele, Umiliaco, Andrea and Brancadoro, Maria Giulia (2016) A simulation-based approach for railway applications using GPR. In: 16th International Conference on Ground Penetrating Radar (GPR), 13-16 June 2016, Hong Kong.

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Abstract

In this work a numerical model capable to predict the electromagnetic response of railway ballast aggregates under different physical conditions has been calibrated and validated by a simulation-based approach. The ballast model is based on the main physical and geometrical properties of its constituent material and it is generated by means of a random-sequential absorption (RSA) approach. A finite-difference time-domain (FDTD) simulator is then employed to calculate the ground-penetrating radar (GPR) signal response to the scenario. The calibration of the model has been performed by taking into account the main physical properties and the grain size characteristics of both the reference ballast material and a fine-grained pollutant material, namely, an A4 soil type material, according to the AASHTO soil classification. The synthetic GPR response has been generated by using the gprMax freeware simulator. Several scenarios have been considered, which in turn were reproduced in laboratory environment and used for the validation of the model. Promising results have demonstrated the high potential of such approach in characterizing the simulated response of complex coarse-grained heterogeneous materials.

Item Type: Conference or Workshop Item (Paper)
Additional Information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: GPR; simulation; FDTD; RSA; railway ballast
Subjects: Construction and engineering > Built environment
Construction and engineering > Civil and structural engineering
Computing
Construction and engineering
Depositing User: Fabio Tosti
Date Deposited: 27 May 2016 17:33
Last Modified: 12 Dec 2016 11:05
URI: http://repository.uwl.ac.uk/id/eprint/2236

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