跨座式单轨列车走行轮轮胎的不均匀磨损

为了优化跨座式单轨列车走行轮轮胎不均匀磨损性能，在运行工况分析基础上建立了走行轮轮胎有限元模型；结合走行轮磨损特性评价指标，建立了一套新的走行轮磨损间接评价方法，该方法以侧偏角和侧倾角为设计变量，通过探索走行轮轮胎侧偏角、侧倾角及其组合对走行轮轮胎磨损与不均匀磨损的影响对车辆二系悬挂参数进行优化，减轻走行轮轮胎磨损. 研究结果表明:优选前，转向架（以前转向架为例）中前、后排走行轮轮胎侧偏角分别为0.5°、0.3°、?0.4°、?0.2°；优选后，转向架中前、后走行轮轮胎侧偏角为0.2°、0.2°、?0.2°、?0.2°；车辆结构参数中二系悬挂横向刚度、垂向刚度对走行轮各轮胎不均匀磨损的影响较大，且选取合适的参数值在一定程度上能够减轻走行轮各轮胎不均匀磨损. 

Uneven Wear of Running Wheel Tires of Straddle Monorail Train

Aiming at investigating the correlation between the parameters of a vehicle’s secondary suspension structure and the uneven wear of the running wheel tires, the goal of optimization was to improve the uneven wear performance of the running wheel tires and the design variables are the vehicle’s secondary suspension parameters. An indirect method of evaluating the running wheel wear was established from the analysis of a finite element model and by combining with evaluation indexes of the running wheel wear characteristics. This method minimizes the running wheel tire wear by exploring the effects of the slip angle and roll angle of the running wheel tires and their combination on the wear and uneven wear of the running wheel tires, and by optimizing the vehicle’s secondary suspension parameters. The results show that before optimization, the slip angles of the front and rear running wheels of the bogie (where the former bogie is taken as an example) are 0.5°, 0.3°, ?0.4°, and ?0.2°, respectively, and that the slip angles of the rear running wheel tires are 0.2°, 0.2°, ?0.2°, and ?0.2°, respectively. Among the vehicle structural parameters, the lateral stiffness of the secondary suspension and the vertical stiffness of the secondary suspension strongly affect the uneven wear of the running wheel tires, which can be reduced to a certain extent by selecting appropriate parameter values.