直线电机轮轨交通线路最小平曲线半径研究

Study on Curve Radius Standard for Linear Metro

良好的曲线通过能力是直线电机轮轨交通最显著的特点之一.本文首先对影响线路平曲线最小半径的主要因素进行了分析,并结合该系统技术特点确定了其合适的指标值.然后,应用行驶动力学理论,对曲线半径、速度与超高等曲线要素进行初步匹配.再利用所建的直线电机轮轨交通车辆/线路动力学模型分析相关线路参数对系统动力响应的影响规律.最后,基于广州地铁4号线系统技术规格,提出了该系统线路平曲线最小半径的推荐值.

Good curving performance is one of the most remarkable characteristics of linear metro. In this paper, based on the technical features of this system, and with the vehicle movement dynamics, the main influence factors which affect the minimum horizontal curve radius standard were analyzed, and the corresponding parameters were determined; then, based on the vehicle and track structures applied in Guangzhou Metro line 4, a dynamic coupling model was developed. The effects of curve radius, speed and superelevation on dynamic responses of the system were also studied, and the curve parameters were checked with this model. Finally, the standard of minimum radius of horizontal curve was proposed for the route alignment of linear metro.