摘要
研究目的:平面线形是道岔设计的核心,也是列车平稳、安全运行的重要保障,当前我国常导高速磁浮交通技术正处于工程应用的关键阶段,系统掌握道岔设计方法并针对性进行优化十分必要。本文系统总结高速磁浮道岔平面线形设计要求,提出一套适用不同速度的道岔平面线形设计与参数计算方法,并研究道岔长度的主要影响因素,为我国自主化高速磁浮道岔研发与迭代优化提供技术支撑。研究结论:(1)为缩短高速磁浮道岔长度,建议采用回旋形缓和曲线;(2)受车辆构造半径的制约,即使道岔侧向通过速度非常低,既有弹性可弯形式的高速磁浮道岔长度难以小于50 m;(3)当道岔侧向通过速度低于50 km/h时,建议采用单圆形道岔线形;(4)当工程上不允许对最大未被平衡离心加速度及其增量同时采用极值时,从减小道岔长度角度建议优先提高未被平衡离心加速度要求;(5)采用窄车体车辆方案能够减小道岔可弯部分末端支距,道岔理论长度可缩短8%~11%;(6)本研究成果可为高速磁浮道岔平面线形设计提供参考和借鉴。
Research purposes:The planar alignment serves as the core element of turnout design and plays a vital role in ensuring smooth and safe train operation.Currently,China's high-speed electromagnetic suspension(EMS)maglev transportation technology has entered a critical phase of engineering application,making it imperative to systematically master turnout design methodologies and conduct targeted optimizations.This paper comprehensively summarizes the design requirements for planar alignment in high-speed maglev turnouts.A systematic approach for alignment design and parameter calculation adaptable to varying operational speeds is proposed,along with an investigation into the key factors influencing turnout length.The research outcomes provide essential technical support for the independent development and iterative optimization of high-speed maglev turnout systems in China.Research conclusions:(1)To shorten the length of high-speed maglev turnouts,the adoption of clothoid transition curves is recommended.(2)Constrained by the vehicle's structural radius,even when the turnout's lateral passing speed is extremely low,the length of existing flexible and bendable high-speed maglev turnouts can hardly be reduced below 50 m.(3)For turnouts with lateral passing speeds below 50 km/h,a single circular curve alignment is suggested,eliminating the need for transition curves.(4)When engineering constraints prevent the simultaneous adoption of extreme values for both maximum unbalanced centrifugal acceleration and its increment,priority should be given to increasing the unbalanced acceleration tolerance,i.e.,enlarging the circular curve radius from the perspective of minimizing turnout length.(5)Implementing a narrow-body vehicle design can reduce the end offset distance of the bendable turnout section,theoretically shortening the turnout length by 8%~11% compared to existing designs.(6)The results of this study can guide the plane linear design of high-speed maglev turnouts.
作者
王健
WANG Jian(China Railway Design Corporation,Tianjin 300308,China)
出处
《铁道工程学报》
北大核心
2025年第10期28-33,共6页
Journal of Railway Engineering Society
基金
国家重点研发计划课题(2023YFB4302504)
中国国家铁路集团有限公司课题(K2024T005)。
关键词
高速磁浮
道岔设计
平面线形
参数计算
high-speed maglev
turnout design
planar alignment
parameter calculation
