摘要
研究轮对动力学相关问题时要考虑轮对的弹性变形,本文在传统迹线法的基础上发展一种考虑轮对弹性的轮轨接触点计算方法。该方法通过计算滚动圆上的点和该点在轨道上的投影点的法向矢量确定可能接触点,形成接触迹线,根据迹线和轨道型面的垂向最小距离确定最终的接触点。利用该方法,本文建立单轮对刚柔耦合系统动力学方程来求解轮轨接触点,并通过刚性轮对与弹性轮对的计算结果对比,讨论轮对弹性变形对接触点位置和轮轨蠕滑率的影响。结果表明,该方法可有效解决考虑轮对弹性的轮轨接触计算问题。
Elastic deformation of wheelset should be considered in research of wheelset dynamics. In this paper a new wheel-rail contact point searching algorithm used for flexible wheelset simulation was developed on tt basis of the conventional wheel-rail contact line method. Normal vectors of a point on each rolling circle and i projection on rail were calculated to find out possible contact points, which formed the wheel-rail contact lira The final contact point was determined by the minimum vertical distance between the contact line and rail se tion profile. The rigid-flexible coupling dynamic equations of the single wheelset were established and dynam simulation was made. The impact of wheelset deformation on the wheel-rail contact position and creepage w discussed. Comparison of rigid and flexible wheelsets shows that the new method is effective to solve flexib wheelset and rail contact problems.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2012年第5期26-31,共6页
Journal of the China Railway Society
基金
国家科技支撑计划(2009BAG12A01-A02)
青年科学基金(51005189)
关键词
轮对弹性
迹线法
轮轨接触点
蠕滑率
flexible wheelset
contact line method
wheel-rail contact point
creepage
