This paper presents a methodology for the assessment of railway ballast using ground-penetrating radar (GPR â 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 Ã 1.5 Ã 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
2017-01-01
Abstract
This paper presents a methodology for the assessment of railway ballast using ground-penetrating radar (GPR â 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 Ã 1.5 Ã 0.5 m dimensions. Finally, the modelling of the frequency spectrum peak and the equivalent diameter of the ballast aggregates was developed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
