The Journal of the INCE of Japan
Online ISSN : 1883-7506
Print ISSN : 0386-8761
Volume 41 , Issue 2
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  • Satoshi Ishikawa, Masaaki Hiroe, Tetsuya Sakuma
    2017 Volume 41 Issue 2 Pages 98-108
    Published: April 01, 2017
    Released: October 23, 2019

    In order to assess the influence of multiple reflections between barriers and railway car bodies on noise propagation, a numerical study using a 2D-FDTD method is performed with changing the barrier height, the lane-to-barrier distance, and the bending angle at the upper part of the barrier. Subsequently, a 1/25 scale model experiment is carried out, which confirms a corresponding tendency between numerical and measured results. Furthermore, considering the discrepancy between the numerically calculated attenuation values and the diffraction attenuation values without multiple reflections by Maekawa’s chart, a chart of correction values is presented to incorporate the effects of multiple reflections.

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