中国铁道科学2011，Vol.32Issue(2)：85-89,5.
铁路货车通过曲线轨道时的非线性运动稳定性研究
Research on the Nonlinear Hunting Stability of Railway Freight Car on Curved Track
摘要
Abstract
Based on a bifurcation diagram for the nonlinear system of a vehicle on tangent track and the dynamic performance of a vehicle on curved track, the bifurcation diagram of the hunting stability for the vehicle on curved track was put forward in this paper. According to this bifurcation diagram, the nonlinear critical speed of the wagon vehicle was calculated, and the effects of the curve radius and the superelevation of the outer rail on the nonlinear critical speed of the freight car were investigated. Results show that a hunting motion of the wagon vehicle will appear due to the larger equivalent conicity, the initial lateral displacement and the attack angle of wheelset. With the hunting motion appearing, the displacement and the lateral force of wheelset are changed sharply and periodically with a wave of 3.6 m. There is much difference in the bifurcation diagram between on curved track and on tangent track. With being related to the centerline of the track, each of vehicle body on curved track has two stable cycles. As for the curved track with a radius of 600 m and a superelevation of 55 mm, the nonlinear critical speed of the heavy-haul vehicle is 76.4 km · h-1 , which is lower than that on tangent track. It is noticeable that the curve radius and the superelevation of the outer rail have much influence on the critical speed, and the larger the parameters of the radius and the superelevation are, the higher the critical speed is, but the critical speed will no longer increase while these parameters reach at certain values.关键词
货车/蛇形运动/稳定性/通过曲线/临界速度/耦合动力学分类
交通工程引用本文复制引用
王开云,刘鹏飞..铁路货车通过曲线轨道时的非线性运动稳定性研究[J].中国铁道科学,2011,32(2):85-89,5.基金项目
"天府英才"工程自主创新领军人才项目(2) （2）
国家重点实验室自主研究课题(2008TPL_T04) （2008TPL_T04）
