基于车辆-轨道耦合动力学的400km/h高速铁路线路平面参数设计研究

Research on Route Plan Design Parameters of 400 km/h High-speed Railway Based on Vehicle-track Coupling Dynamics

为推进我国400km/h等级高速铁路的规划建设和创新发展,本文基于车辆-轨道耦合动力学理论,开展了既有350km/h高速铁路曲线设计参数适应性分析和400km/h高速铁路线路平面参数设计方法研究,揭示了平面参数匹配关系对系统动力学性能的影响规律。研究结果表明:当曲线半径小于7000m时,既有规范的曲线设计参数不再适用;在满足动力学指标和欠/过超高限值要求的条件下,并考虑留有一定的安全裕量,建议400km/h高速铁路曲线半径不应小于7500m;相比于既有欠/过超高设计要求,综合考虑车轨系统动力学性能指标来设计曲线超高具有更宽的合理设置范围。本文通过系统的动力学分析,提出400km/h条件下曲线线路平面参数匹配建议值,并评估了其安全裕量,研究成果可为400km/h高速铁路线路平面设计提供理论参考。

In order to promote the planning,construction and innovative development of the 400 km/h high-speed railway in China,this paper analyzes the adaptability of curve design parameters of the existing 350 km/h high-speed railway and studies the route plan parameters design method of the 400 km/h high-speed railway based on the vehicle-track coupling dynamics theory,and reveals the influence of plan parameters matching relation on the system dynamics performance.The research results show that when the curve radius is less than 7000 m,the curve design parameters of the current codes are no longer applicable;under the condition of meeting the requirements of dynamics indexes and deficient/surplus superelevation limits,and in consideration of a certain safety margin,it is suggested that the curve radius of 400 km/h high-speed railway should not be less than 7500 m;compared with the existing design requirements for under/over superelevation,the design of curve superelevation has a wider reasonable setting range in comprehensive consideration of the dynamic performance indicators of the vehicle-track system.Through the dynamic analysis,this paper puts forward the recommended value of the plan parameters matching of curve track under the condition of 400 km/h,and evaluates the safety margin.The research results can provide theoretical reference for the route plan design of 400 km/h high-speed railway.