This paper presents a methodology for the assessment of railway ballast using ground-penetrating radar (GPR – 2 GHz horn antenna). The primary approach in this endeavour was the finite-difference time-domain (FDTD) simulations of ballast (a multi-stage process in terms of ballast size). To this effect, a combination of random sequential adsorption (RSA) and FDTD algorithms were applied. The results of the numerical simulation then were used to compare with the experimental investigations results using a container (methacrylate material) of the 1.5 × 1.5 × 0.5 m dimensions. Finally, the modelling of the frequency spectrum peak and the equivalent diameter of the ballast aggregates was developed.

Bianchini Ciampoli, L., Tosti, F., Brancadoro, M.G., D'Amico, F., Alani, A.M., & Benedetto, A. (2017). A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties. NDT & E INTERNATIONAL, 90, 39-47 [10.1016/j.ndteint.2017.05.005].

A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties

Bianchini Ciampoli, Luca;Tosti, Fabio;D'Amico, Fabrizio;Benedetto, Andrea
2017

Abstract

This paper presents a methodology for the assessment of railway ballast using ground-penetrating radar (GPR – 2 GHz horn antenna). The primary approach in this endeavour was the finite-difference time-domain (FDTD) simulations of ballast (a multi-stage process in terms of ballast size). To this effect, a combination of random sequential adsorption (RSA) and FDTD algorithms were applied. The results of the numerical simulation then were used to compare with the experimental investigations results using a container (methacrylate material) of the 1.5 × 1.5 × 0.5 m dimensions. Finally, the modelling of the frequency spectrum peak and the equivalent diameter of the ballast aggregates was developed.
Bianchini Ciampoli, L., Tosti, F., Brancadoro, M.G., D'Amico, F., Alani, A.M., & Benedetto, A. (2017). A spectral analysis of ground-penetrating radar data for the assessment of the railway ballast geometric properties. NDT & E INTERNATIONAL, 90, 39-47 [10.1016/j.ndteint.2017.05.005].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11590/330297
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