地铁9号道岔侧向通过速度提升可行性研究
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摘要
为提高地铁9号道岔侧向过岔能力,提出将9号道岔侧向通过速度提升至50 km/h,为此设计了5种道岔平面线型方案。基于车辆-道岔耦合动力学理论,分析不同的道岔平面线型方案对地铁车辆运行平稳性、安全性的影响。经方案比选可得:地铁9号道岔尖轨采用相离半切线型,尖轨尖端理论厚度增加至2 mm,尖轨冲击角取0.014 1～0.015 3rad,既可提高尖轨的整体耐磨性,也可保证过岔较好的乘坐舒适性;导曲线半径采用350 m,有利于降低列车经过导曲线时未被平衡的离心加速度,提高列车过岔舒适性。
In order to improve the turnout lateral passing ca-pacity of No.9 metro turnout,five design schemes are put for-ward aiming to accelerate the speed to 50 km/h. Based on ve-hicle-turnout coupling dynamics theory,the influence of differ-ent plane alignment schemes on the running stability and safe-ty of metro vehicle is analyzed. A scheme is selected through comparison,by adopting the half-tangent alignment,the switch rail end thickness is 2 mm,the impact angle is 0.014 1 ～ 0.0153 rad. This scheme could improve the wear resistance of the switch rail and guarantee the riding comfort,because the 350 m mediated curve is favorable for the reduction of centrifugal acceleration that is not balanced when the vehicle passes through the mediated curve,thus the turnout passing comfort is improved.
In order to improve the turnout lateral passing ca-pacity of No.9 metro turnout,five design schemes are put for-ward aiming to accelerate the speed to 50 km/h. Based on ve-hicle-turnout coupling dynamics theory,the influence of differ-ent plane alignment schemes on the running stability and safe-ty of metro vehicle is analyzed. A scheme is selected through comparison,by adopting the half-tangent alignment,the switch rail end thickness is 2 mm,the impact angle is 0.014 1 ～ 0.0153 rad. This scheme could improve the wear resistance of the switch rail and guarantee the riding comfort,because the 350 m mediated curve is favorable for the reduction of centrifugal acceleration that is not balanced when the vehicle passes through the mediated curve,thus the turnout passing comfort is improved.
引文
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[2]王平.高速铁路道岔设计理论与实践[M].成都:西南交通大学出版社,2011.
[3]郭福安.国外高速铁路的道岔设计[J].中国铁路,2006(2):48.
[4]王树国,顾培雄.客运专线道岔技术研究[J].中国铁路,2007(8):21.
[5]刘皓,袁宝军.直向通过速度为200 km/h的60 kg/m钢轨12号道岔的研制[J].铁道建筑,2006(9):72.
[6]翟婉明,王开云.机车车辆侧向通过道岔时的运行安全性评估[J].同济大学学报(自然科学版),2004,32(3):382.
[7]全顺喜.9号单开道岔尖轨平面线型方案研究[J].铁道工程学报,2013,30(12):29.
[8]汤奇志,马大炜,时颢.高速铁路对道岔侧向最高允许通过速度的要求[J].中国铁道科学,2004,25(3):109.