| 铁路货车通过曲线轨道时的非线性运动稳定性研究 |
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| 引用本文： | 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). |
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| 作者姓名： | 王开云 刘鹏飞 |
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| 作者单位： | 西南交通大学牵引动力国家重点实验室,四川,成都,610031 |
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| 基金项目： | “天府英才”工程自主创新领军人才项目(2); 国家重点实验室自主研究课题(2008TPL_T04) |
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| 摘 要： | 根据直线轨道上非线性车辆系统蛇形运动的极限环和曲线轨道上车辆的动态特性,给出曲线轨道非线性车辆系统蛇形运动的极限环,并计算出货车的非线性临界速度,分析曲线半径和外轨超高对货车非线性临界速度的影响。结果表明:在大锥度、横向位移激扰、轮对冲角等因素的作用下,货车轮对在曲线轨道上易出现蛇形失稳,并且在蛇形失稳时轮对的横向振荡剧烈,蛇形波长为3.6 m;与直线轨道上的极限环不同,曲线轨道上非线性车辆系统相对轨道中心线而言,具有2个稳定的极限环;当重载货车空车通过半径600 m、超高55 mm曲线轨道时,其非线性临界速度为76.4 km.h-1,低于直线轨道上的临界速度,说明曲线轨道的半径和外轨超高对车辆非线性临界速度有明显的影响,而且半径和超高越大,临界速度也越高,但当半径和超高增加到一定程度,临界速度不再随之增长。
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| 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 |
Research on the Nonlinear Hunting Stability of Railway Freight Car on Curved Track |
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| WANG Kaiyun,LIU Pengfei.Research on the Nonlinear Hunting Stability of Railway Freight Car on Curved Track[J].China Railway Science,2011,32(2). |
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| Authors: | WANG Kaiyun LIU Pengfei |
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| Affiliation: | WANG Kaiyun,LIU Pengfei(Traction Power State Key Laboratory,Southwest Jiaotong University,Chengdu Sichuan610031,China) |
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| 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 s... |
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| Keywords: | Freight car Hunting Stability Curve negotiation Critical speed Coupling dynamics |
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