研究目的: 为研究钢弹簧浮置板轨道在不同车速下的动力学性能、分析其用于160 km/h车速市域快轨的安全性,铺设了8块共200 m长的钢弹簧浮置板道床试验段,在试验段开行用于市域快轨的列车并由60 km/h逐级提速至160 km/h,测试5个断面的轨道动位移和轮轨力,分析不同车速下的行车安全性。
研究结论: (1)当试验列车车速逐渐增至160 km/h时,钢弹簧浮置板轨道各项安全性指标并未随着车速增加而显著增加;(2)浮置板轨道各测试断面板上垂向动位移均未超过3.0 mm,且随车速增加有降低趋势;(3)不同车速下脱轨系数均小于0.3,轮重减载率均小于0.4,轮轴横向力均小于20 kN,且均有较大的安全余量;(4)本文研究可为市域快轨高等级减振措施的设计和实施提供试验依据。

Research purposes: To investigate the dynamic behavior of steel spring floating slab track (SSFST) under different train speed, and analyze the train running safety when it is used in inner-city rapid rail transit at 160 km/h, eight steel spring floating slab tracks with a total length of 200 m were installed in a test railway line. In the test section, a train speed increased step by step from 60 km/h to 160 km/h. The track dynamic displacement and wheel/rail forces were tested on five sections, and the train running safety under different speeds was analyzed.
Research conclusions: (1) When the train speed gradually increases to 160 km/h, all the safety indexes of steel spring floating slab track do not increase significantly with speed. (2) The vertical dynamic displacements on each steel spring floating slab track do not exceed 3.0 mm, and they decrease with the increase of train speed. (3) At different train speeds, the derailment coefficient is less than 0.3, the rate of wheel load reduction is less than 0.4, and the wheelset lateral force is less than 20 kN. There is safety redundancy for all the above aspects. (4) The present research can provide experimental support for the design and implementation of high-level vibration reduction measures for inner-city rapid rail transit.