嵌入式轨道竖向支撑刚度优化设计
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摘要
有机电车嵌入式轨道主要通过承轨槽内的填充材料固定钢轨并提供连续支撑,其承轨槽内结构复杂,刚度计算没有具体的解析表达式。为此,通过有限元方法分析了影响钢轨竖向支撑刚度的因素和范围,同时建立了有轨电车-嵌入式轨道耦合动力学模型,得到了钢轨竖向支撑刚度对嵌入式轨道动态特性的影响曲线。此外,综合考虑承轨槽填充材料对钢轨和轨道板的动力学特性影响,给出了钢轨竖向支撑刚度的合理取值范围。
Since the embedded tracks use filling materials in rail groove to fix the rail and provide continuous support,the structure of rail groove is very complicated,the stiffness of which needs specific analytical expressions. Through finite element method,the factors affecting the vertical supporting stiffness of the rail stiffness and the affecting ranges are analyzed,a modern tram-embedded track coupling dynamics model is established,the influencing curve of the vertical supporting stiffness on the dynamic characteristics of rail and slab are obtained. With a comprehensive consideration of the influence casted by filling materials in rail supporting groove on the dynamic characteristics of embedded track,the reasonable range for rail supporting vertical stiffness value is provided.
Since the embedded tracks use filling materials in rail groove to fix the rail and provide continuous support,the structure of rail groove is very complicated,the stiffness of which needs specific analytical expressions. Through finite element method,the factors affecting the vertical supporting stiffness of the rail stiffness and the affecting ranges are analyzed,a modern tram-embedded track coupling dynamics model is established,the influencing curve of the vertical supporting stiffness on the dynamic characteristics of rail and slab are obtained. With a comprehensive consideration of the influence casted by filling materials in rail supporting groove on the dynamic characteristics of embedded track,the reasonable range for rail supporting vertical stiffness value is provided.
引文
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[6]VANLIER S.The vibro-acoustic modelling of slab track with embedded rails[J].Journal of Sound and Vibration,2000(3):805-817.
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[11]王开文.车轮接触点迹线及轮轨接触点几何参数的计算[J].西南交通大学学报,1984,19(1):89-99.
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[2]BRINCKERHOFF P,INCORPORATED.Track design handbook for light rail transit[M].2nd ed.Washington D.C.:TCRP Report,2012.
[3]赵国堂.高速铁路无砟轨道结构[M].北京:中国铁道出版社,2006.
[4]秦超红.嵌入式轨道线路稳定性研究[D].成都:西南交通大学,2014.
[5]LING L,HAN J,XIAO X,et al.Dynamic behavior of an embedded rail track coupled w ith a tram vehicle[J].Journal of Vibration and Control,2015.
[6]VANLIER S.The vibro-acoustic modelling of slab track with embedded rails[J].Journal of Sound and Vibration,2000(3):805-817.
[7]NILSSON C M,JONES C J C,THOMPSON D J,et al.A w aveguide finite element and boundary element approach to calculating the sound radiated by railw ay and tram rails[J].Journal of Sound and Vibration,2009(3):813-836.
[8]翟婉明.车辆-轨道耦合动力学[M].3版.北京:科学出版社,2007.
[9]肖新标.复杂环境状态下高速列车脱轨机理研究[D].成都:西南交通大学,2013.
[10]CHEN G,ZHAI W M.A new wheel rail spatially dynamic coupling model and its verification[J].Vehicle System Dynamics,2004,41(4):301-322.
[11]王开文.车轮接触点迹线及轮轨接触点几何参数的计算[J].西南交通大学学报,1984,19(1):89-99.
[12]KALKER J J.On the rolling contact of two elastic bodies in the presence of dry friction[D].Delft:Delft University of Technology,1967.
[13]SHEN Z Y,HEDRICK J K,ELKINS J A.A comparison of alternative creep force models for rail vehicle dynamic analysis[J].Vehicle System Dynamics,1983,12(1):79-83.