摘要
为了分析LMA车轮型面位置偏移对车辆动力学性能的影响,设计不同型面位置偏移量的车轮,通过轮轨接触分析和车辆动力学计算,分析了车轮型面位置偏移对轮轨几何接触特性、车辆临界速度和曲线通过性能的影响.结果表明,较小的偏移量对临界速度影响不大,当偏移量达到1.75 mm后临界速度急剧下降.以均衡速度通过曲线时,型面偏移量的增大对轮轨横向力的影响不大,但会使轮对横移量的最大值显著增大.与反相偏移相比,同相偏移对车辆在直线上的临界速度及曲线上的横移量影响更大.因此,车轮型面位置偏移对车辆动力学性能有较大影响,应当避免发生,LMA车轮型面偏移量最大不得超过1.75 mm.
To analysis the effects of LMA wheel profile deviation on vehicle dynamics performances, wheel pro- files with different position deviations were designed. By wheel/rail contact analysis and vehicle dynamics cal- culation, the effects of wheel profile deviation on wheel/rail contact geometry, vehicle critical speed and cur- ving performance are studied. The results indicate that small deviation doesn＇ t influence greatly the critical speed ,while the deviation approaches 1.75 ram, the critical speed rapid droping. During curving with balanced speed, the increase of wheel profile deviation doesn＇ t influence the wheel/rail lateral force very much, but the wheelset lateral displacements increases significantly. Compared with out-phase wheel profile deviation, the in- phase deviation exerts more obvious influence on vehicle critical speed and wheelset lateral displacement dur- ing curving. Thus, wheel profile position deviation has great influence on vehicle dynamics performance, which should be avoided, and the maximum position deviation of LMA profile should be within 1.75 ram.
出处
《大连交通大学学报》
CAS
2015年第1期18-23,共6页
Journal of Dalian Jiaotong University
基金
国家自然科学基金资助项目(51305054)
