高速铁路板式轨道的动力特性分析

Analysis of Dynamic Character of High-Speed Rallway Slab Track

本文讨论了高速行车对板式轨道的动力响应问题。分析结果表明,高速行车时板式轨道的竖直位移比低速行车时小,下沉的范围比低速行车时要广,最大下沉量偏向车轮作用点后方。荷载频率越高,板式轨道的竖直位移越小。

The problems about dynamic response of slab track under high- speed moving load are discussed. The analysis shows that the vertical displacement of rail and slab under high-speed moving load is smaller than that under low- speed moving load and the vertical displacement range under the high-speed moving load is wider than that under low-speed moving load. The maximum vertical displacement of track occurs at the point behind the action piont of the wheel load. Basedes, the higer the load frequency, the smaller the vertical displacement of slab track is.