重载铁路最小曲线半径动力学分析
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摘要
研究目的:最小曲线半径是重载铁路主要技术标准之一,直接影响到重载车辆运行的安全性与平稳性。在总结国内外重载铁路最小曲线半径研究成果的基础上,基于动力学理论建立重载铁路线路曲线地段车线系统动力学模型,并利用此模型分析不同曲线半径条件下的重载铁路车线系统动力特性,探索曲线半径对车线系统动力学性能的影响规律。研究结论:(1)重载铁路曲线半径大小对重载列车运行安全性及平稳性、轮轨动态作用以及轮轨磨耗均有不同程度的影响;(2)曲线半径小于800 m时,减小半径将导致车线系统动力学性能迅速下降;曲线半径超过1 000 m后,增大半径对车线系统动力学性能有一定提高,但改善幅度较小,尤其当曲线半径超过1 500 m后,半径变化对车线系统动力学性能影响甚微;(3)重载铁路最小曲线半径建议一般条件下取为1 000 m,困难条件下取为800 m;(4)设计重载铁路线路时,建议尽量采用半径不小于1 500 m的曲线;(5)本研究成果可为重载铁路曲线设计以及相关规范的制定提供参考。
Research purposes: The minimum curve radius is one of major technical standards on heavy haul railway,impacting on running safety and stability of the heavy haul vehicle. On the basis of the research at home and abroad on the minimum curve radius of heavy haul railway,a vehicle- track dynamic model on the curve section of heavy haul railway is established based on the dynamics theory and dynamic characteristics of the vehicle- track system on heavy haul railway in different curve radius conditions are analyzed by the model. Then the influence law of curve radius on vehicle- track dynamic performance is studied.Research conclusions:(1) The curve radius of the heavy haul railway has varying degrees of impact on running safety and stability of heavy haul vehicle,wheel- rail interaction and wheel- rail wear of heavy haul railway.(2) When the radius of curve is less than 800 m,vehicle- track dynamic performance will be decreased rapidly on the condition of reducing the radius of curve; When the radius of curve is more than 1 000 m,vehicle- track dynamic performance will be improved in a certain degree while increasing the radius of curve,but the improvement is limited; Especially,when the radius of curve is more than 1 500 m,the change of the radius of curve has little effect on vehicle- track dynamic performance.(3) It is suggested that the minimum curve radius of heavy haul railway is 1 000 m on general conditionsand on difficult conditions 800 m is allowed.(4) The radius of curve should be not less than 1 500 m as far as possible while designing heavy haul railway line.(5) The research result can provide a reference to design the curve of heavy haul railway and formulate related normative documents.
Research purposes: The minimum curve radius is one of major technical standards on heavy haul railway,impacting on running safety and stability of the heavy haul vehicle. On the basis of the research at home and abroad on the minimum curve radius of heavy haul railway,a vehicle- track dynamic model on the curve section of heavy haul railway is established based on the dynamics theory and dynamic characteristics of the vehicle- track system on heavy haul railway in different curve radius conditions are analyzed by the model. Then the influence law of curve radius on vehicle- track dynamic performance is studied.Research conclusions:(1) The curve radius of the heavy haul railway has varying degrees of impact on running safety and stability of heavy haul vehicle,wheel- rail interaction and wheel- rail wear of heavy haul railway.(2) When the radius of curve is less than 800 m,vehicle- track dynamic performance will be decreased rapidly on the condition of reducing the radius of curve; When the radius of curve is more than 1 000 m,vehicle- track dynamic performance will be improved in a certain degree while increasing the radius of curve,but the improvement is limited; Especially,when the radius of curve is more than 1 500 m,the change of the radius of curve has little effect on vehicle- track dynamic performance.(3) It is suggested that the minimum curve radius of heavy haul railway is 1 000 m on general conditionsand on difficult conditions 800 m is allowed.(4) The radius of curve should be not less than 1 500 m as far as possible while designing heavy haul railway line.(5) The research result can provide a reference to design the curve of heavy haul railway and formulate related normative documents.
引文
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[3]易思蓉,聂良涛,秦方方.基于动力学分析的高速铁路最小曲线半径研究[J].西南交通大学学报,2013(1):16-20.Yi Sirong,Nie Liangtao,Qin Fangfang.Study on Minimum Curve Radius of High-speed Railway Based on Dynamics Analysis[J].Journal of Southwest Jiaotong University,2013(1):16-20.
[4]周惟俊.对新建时速250 km客货共线铁路最小曲线半径与缓和曲线长度标准的建议[J].铁道标准设计,2007(3):11-14.Zhou Weijun.Suggestion on Standard of Minimum Curve Radius and Length of Transition Curve of the Newly Built 250 km/h Mixed Passenger and Freight Railway[J].Railway Standard Design,2007(3):11-14.
[5]陈景瑜,许智明.山区重载铁路专用线设计探讨[J].高速铁路技术,2015(3):5-8.Chen Jingyu,Xu Zhiming.Discussion on Problems of Design of Heavy-haul Special Railway Line in Mountainous Area[J].High Speed Railway Technology,2015(3):5-8.
[6]王晓刚.重载线路设计参数的研究[J].中国铁路,2004(3):22-24.Wang Xiaogang.Research on the Design Parameter of Heavy-haul Line[J].Chinese Railways,2004(3):22-24.
[7]程奕龙.重载铁路小半径曲线段线路参数研究[D].北京:北京交通大学,2012.Cheng Yilong.Parameter Study of Small Radius Curves in Heavy Haul Railway[D].Beijing:Beijing Jiaotong University,2012.
[8]翟婉明.车辆-轨道耦合动力学(第三版)[M].北京:科学出版社,2007.Zhai Wanming.Vehicle-Track Coupling Dynamics(Third Edition)[M].Beijing:Science Press,2007.
[2]曾勇.350 km/h高速铁路最小曲线半径研究[J].铁道建筑,2008(9):101-103.Zeng Yong.Research on Minimum Curve Radius of 350km/h High Speed Railway[J].Railway Engineering,2008(9):101-103.
[3]易思蓉,聂良涛,秦方方.基于动力学分析的高速铁路最小曲线半径研究[J].西南交通大学学报,2013(1):16-20.Yi Sirong,Nie Liangtao,Qin Fangfang.Study on Minimum Curve Radius of High-speed Railway Based on Dynamics Analysis[J].Journal of Southwest Jiaotong University,2013(1):16-20.
[4]周惟俊.对新建时速250 km客货共线铁路最小曲线半径与缓和曲线长度标准的建议[J].铁道标准设计,2007(3):11-14.Zhou Weijun.Suggestion on Standard of Minimum Curve Radius and Length of Transition Curve of the Newly Built 250 km/h Mixed Passenger and Freight Railway[J].Railway Standard Design,2007(3):11-14.
[5]陈景瑜,许智明.山区重载铁路专用线设计探讨[J].高速铁路技术,2015(3):5-8.Chen Jingyu,Xu Zhiming.Discussion on Problems of Design of Heavy-haul Special Railway Line in Mountainous Area[J].High Speed Railway Technology,2015(3):5-8.
[6]王晓刚.重载线路设计参数的研究[J].中国铁路,2004(3):22-24.Wang Xiaogang.Research on the Design Parameter of Heavy-haul Line[J].Chinese Railways,2004(3):22-24.
[7]程奕龙.重载铁路小半径曲线段线路参数研究[D].北京:北京交通大学,2012.Cheng Yilong.Parameter Study of Small Radius Curves in Heavy Haul Railway[D].Beijing:Beijing Jiaotong University,2012.
[8]翟婉明.车辆-轨道耦合动力学(第三版)[M].北京:科学出版社,2007.Zhai Wanming.Vehicle-Track Coupling Dynamics(Third Edition)[M].Beijing:Science Press,2007.
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