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| Analysis of the Dynamic Performance for Slab Track Settlement on Embankment |
| HAN Yi-tao , YAO-Li |
| China Railway Eryuan Engineering Group Co. Ltd.，Chengdu, Sichuan 610031，China |
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Abstract Research purposes: The stability and enduring of slab track is controlled by the track foundation, and the asymmetrical settlement of embankment is the kernel factor, so it is very necessary to analyze the dynamic performance of wheel/rail system.
Research methods: Based on the vehicle-track coupling dynamics theory, the vertical dynamics model of vehicle and track on the embankment had been set up, and the computer program is worked.
Research results: The dynamics responses is obtained regards on different working condition, and the asymmetrical settlement influence law on the wheel/rail dynamic system is researched too.
Research conclusions: Analysis results indicate that the wheel/rail system dynamic interaction increased sharply when the vehicle passing over asymmetrical settlement, the dynamic stress of CA layer and embankment increased also. The a- symmetrical settlement suggestion value should be limited to under 20mm-30 mm/20 m with speed of 250 km/h, then the asymmetrical settlement suggestion value should be limited to under 20 mm/20 m with speed of 300 km/h.
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Received: 25 July 2007
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[1]王其昌，等.高速铁路土路基上无碴轨道的应用[J].铁 道标准设计，2003(12):1-4.
[2]翟婉明.车辆-轨道藕合动力学[M].北京:中国铁道出 版社，2002.
[3]曹志远.板壳振动理论[M].北京:中国铁道出版社， 1989.
[4] Zhai Wanming. Two simple fast integration methods for large -scale dynamic problems in engineering [ J ] . International Journal for Numerical Methods in Engineering, 1996, 39 (24):4199-4214.
[5]孙红林，等.客运专线土质路基地段铺设无碴轨道调研 及分析[J].铁道勘测与设计2005(1):37-41.
[6]尤昌龙，等.铁路客运专线路基沉降特性及其对策[J]. 铁道科学与工程学报，2005 (5 ) :9-12.
[7]李小和.客运专线路基地段铺设无碴轨道有关问题的探 讨[J].铁道工程学报，2005(5) :20-24
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2007, Vol. 24 
