摘要
运用耦合动力学理论,仿真分析钢轨扭转变形对机车车辆曲线通过和直线运行时的轮轨动态相互作用的影响。研究结果表明:机车车辆通过曲线轨道时,产生了较大的扭转幅值,将增大轨距动态挤开量,并且扭转速率也很明显,进一步影响轮轨蠕滑率;对于曲线通过的轮轨动态相互作用性能,考虑扭转变形的指标值较不考虑扭转变形的值要小,差异在10%以内;机车车辆在直线轨道上运行时,钢轨扭转变形对轮轨接触点分布的影响较明显,但钢轨微小扭转变形对轮轨动态安全性指标影响不大;钢轨向内侧略微翻转,有利于改善直线轨道上的轮轨接触几何关系。
Effects of rail torsion on wheel-rail dynamic interaction are analyzed for curved and tangent track based on a theory of coupling dynamics. Calculated results show that, in a process of negotiation, it will produce much value of the torsion angle which helps to enlarge the dynamic track gauge, and the angle velocity which has much effect on the wheel-rail creepage. As for the wheel-rail dynamic performance on curved track, calculated results with consideration of the rail torsion are smaller than those without consideration, and the difference scope is lower than 10%. When a train runs on the tangent track, the rail angles have much effect on the range of wheel-rail contact and little influence on the wheel-rail dynamic performance. It is advantageous to improve the wheel-rail contact geometrical relationship on tangent track for an inner angle with minor value.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2008年第3期68-72,共5页
China Railway Science
基金
四川省杰出青年学科带头人培养计划基金资助项目(06ZQ026-003)
教育部新世纪人才支持计划基金资助项目(NCET-07-0716)
关键词
钢轨扭转
轮轨相互作用
接触几何关系
动力性能
Rail torsion
Wheel-rail interaction
Contact geometrical relationship
Dynamic performance
