【摘要】 研究目的:道岔侧向通过速度是影响地铁线路运输能力的重要因素,为探明地铁道岔侧向最大通过速度,以某地铁12号道岔为例,基于迹线法和车辆-道岔耦合动力学,结合拉丁超立方随机抽样方法,生成关键动力学参数随机样本,研究标准车轮与标准钢轨和磨耗车轮与实测钢轨匹配的轮轨接触几何特性和车辆-道岔系统动力响应,以及长期运营条件下道岔侧向容许速度。研究结论:(1)轮轨关系演变后,轮载过渡延后;(2)实测轮轨匹配下,道岔侧逆向容许通过速度比轮轨为标准设计状态时低2 km/h;(3)结合长期运营条件下轮轨实际状态,考虑车辆动力学参数的随机性,所分析的12号道岔侧向容许通过速度为55 km/h;(4)针对不同的地铁道岔,均可以通过实测轮轨型面,以及考虑车辆动力学参数的随机性的方法,探明既有道岔的侧向最大通过速度,提升地铁线路的运输能力。更多还原

【Abstract】 Research purposes: The speed of metro passing through turnouts in the diverging route is an important factor that affects the transportation capacity of metro lines. In order to find out the maximal speed of metro passing through turnouts in the diverging route,aiming at the No. 12 turnout,based on the trace principle and vehicle-turnout coupled dynamics,combined with Latin hypercube sampling method that generates random samples of key dynamic parameters,the wheel-rail contact geometric characteristics and the vehicle-turnout system performance are studied by matching standard rail profile with standard wheel tread and matching measured rail profile with worn wheel tread. The allowed crossing speed of vehicle passing through turnouts in the diverging route is studied under the long term operating conditions.Research conclusions:( 1) With the wheel-rail relationship evolution,the wheel load transition is delayed.( 2) Under the matching of measured wheel and rail,the reverse allowed crossing speed of turnouts is 2 km/h lower than that when the wheel-rail is in the standard design state.( 3) Combining with the actual operating conditions of wheel and rail as well as considering the randomness of vehicle dynamics parameters,the allowed crossing speed of vehicle passing through No. 12 turnout in the diverging route is 55 km/h.( 4) For different metro turnouts,the maximal speed of metro passing through turnouts in the diverging route can be proved by measuring the actual operating conditions of wheel and rail as well as considering the randomness of vehicle dynamics parameters,so as to improve the transport capacity of metro lines.更多还原