レール溶接部凹凸によるフローティング·ラダー軌道の衝撃応答解析

抄録

The ladder sleeper is a newly developed rail-support component for the next generation railway structure. The floating ladder track using the ladder sleeper proposed by authors is floated from the concrete track-bed by vibration isolators, that are devised instead of ballast to reduce total weight and the vibration of the track. A drop-weight impact test machine is fabricated on the floating ladder track to study on the impact behavior of the track. The experimental results are compared with finite element results. An efficient finite element formulation and the numerical method to solve the combined dynamic behavior of a Shinkansen train running on the track with rail irregularities in railway structure are presented. Based on the numerical method impulsive wheel-load characteristics caused by the high-speed train running on the track with rail irregularities are investigated.