Author(s): Grau Loïc, Trévisan Benjamin, Bozzetto Denis, Laulagnet Bernard
This paper aims at presenting a semi-analytical model of a railway platform on an elastomeric mat and coupled to the ground. The model is based on the flexural plate vibration of the railway platform coupled to a surface spring which represents the elastomeric mat. The upper structure of the platform is excited by a punctual force while the lower structure is coupled to the ground using a 2D spatial Fourier Transform. When sizing the characteristics of the elastomeric mat, one often considers the resonance frequency as the most important parameters. From a practical point of view for engineer, this parameter gives an average of performance insulation at higher frequency. However the resonance frequency may vary from on site to another mainly due to ground characteristics. This paper introduces the effect of such shift on the insertion loss.
Name: Dr Loïc Grau