高速鉄道の転動音低減のためのレール断面形状の検討

概要

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Cross-sectional configurations of rail for reduction of rolling noise of high-speed railway; Shinkansen are examined. First, depending on the Timoshenko's beam theory, the random vibration of an infinite rail with various cross sections subjected to the surface roughness excitation is analyzed considering the coupling with one material particle which is the model of wheel traveling on it. Then, the distributions of sound pressures radiated from those vibrating rails on the slab track are calculated based on the Boundary Element Method. In order to evaluate the reduction effects of rolling noise, the line spectrum approximation is introduced, and the radiated sound powers are estimated for seven definite frequencies in the range from 500 Hz to 200 Hz and relative reduction effects in comparison with the standard 60 kg long rail of the present Shinkansen are examined, and the effective rail cross-sectional configurations for reduction of rolling noise are proposed from the viewpoint of acoustic engineering.
一般社団法人日本機械学会の論文
2001-09-25