浮置板板下胶垫的温变特性及其对轮轨系统的影响
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摘要
以我国地铁常用浮置板板下胶垫为研究对象,测取-40~30℃的温度环境中板下胶垫的静刚度。建立车辆-浮置板轨道垂向耦合动力学模型,分析板下胶垫的温度敏感性以及不同温度环境下板下胶垫温变刚度对轮轨系统动力响应特征。研究结果表明:板下胶垫静刚度在工作荷载范围内为常量,不具有幅变非线性特征。板下胶垫的线性静刚度随着温度的降低而急剧升高,增幅高达224%以上。板下胶垫的温变刚度主要影响橡胶隔振垫浮置板轨道的浮置板位移,浮置板垂向最大位移变化率可达到204%。其次,板下胶垫的温变刚度对钢轨的垂向位移也会产生一定的影响,钢轨垂向最大位移变化率为31%。板下胶垫的温变刚度对轮轨之间作用力产生的影响较小。
With reference to the commonly used rubber pad under the floating slab,the static stiffness of the rubber pad is measured in the temperature range between-40 ℃ and 30 ℃,and the vehicle floating slab track coupled dynamic model is established to analyze the temperature-sensitivity of the rubber pad and the influence of temperature-dependent stiffness of the rubber pad. The research results show the static stiffness of the rubber pad in the working load range is a constant without amplitude dependent nonlinear characteristics. The static stiffness of the rubber pad shows a sharp increase when the temperature decreases and the increased amplitude reaches 224 percent,which reveals that the rubber pad is sensitive to low temperature. The change of rubber pad stiffness mainly affects the displacement of the floating slab,and the maximum change rate of displacement may reach 204 percent.Furthermore,the change of rubber pad stiffness has certain impact on the displacement of the rail and the maximum change rate of rail displacement may reach 31 percent. Therefore,the influence caused by the change of the rubber pad stiffness on the wheel-rail forces is small.
With reference to the commonly used rubber pad under the floating slab,the static stiffness of the rubber pad is measured in the temperature range between-40 ℃ and 30 ℃,and the vehicle floating slab track coupled dynamic model is established to analyze the temperature-sensitivity of the rubber pad and the influence of temperature-dependent stiffness of the rubber pad. The research results show the static stiffness of the rubber pad in the working load range is a constant without amplitude dependent nonlinear characteristics. The static stiffness of the rubber pad shows a sharp increase when the temperature decreases and the increased amplitude reaches 224 percent,which reveals that the rubber pad is sensitive to low temperature. The change of rubber pad stiffness mainly affects the displacement of the floating slab,and the maximum change rate of displacement may reach 204 percent.Furthermore,the change of rubber pad stiffness has certain impact on the displacement of the rail and the maximum change rate of rail displacement may reach 31 percent. Therefore,the influence caused by the change of the rubber pad stiffness on the wheel-rail forces is small.
引文
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[13]张攀,周昌盛,王平.轨下垫板刚度的时变特性及其影响研究[J].铁道标准设计,2015(9):49-52.
[14]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 21527—2008轨道交通扣件系统弹性垫板[S].北京:中国标准出版社,2008.
[15]翟婉明.车辆-轨道耦合动力学[M].4版.北京:科学出版社,2015.
[16]何况.道床隔振垫的阻尼减振性能分析及应用研究[J].材料开发与应用,2014(6):27-33.
[2]韦凯,杨帆,王平,等.扣件胶垫刚度的频变性对地铁隧道环境振动的影响[J].铁道学报,2015(4):80-86.
[3]于春华.城市轨道交通轨道减振设计与研究[J].铁道工程学报,2007(4):77-79.
[4]刘作为.减振垫浮置板轨道的振动及隔振效果研究[D].北京:北京交通大学,2012.
[5]刘峰,曾向荣,张宏亮,等.新型橡胶减振垫浮置板的应用研究[J].都市快轨交通,2013(3):50-53.
[6]张波,张涛.城市轨道交通工程聚氨酯浮置板减振道床技术应用研究[J].铁道标准设计,2014(7):45-48.
[7]刘克飞,刘学毅.橡胶浮置板轨道垂向动力特性分析[J].铁道建筑,2012(8):113-116.
[8]陈罄超,唐剑.水害条件下弹性道床垫减振轨道的性能研究[J].铁道标准设计,2016(4):30-35.
[9]刘锦辉,周华龙,陈冶.隔离式减振垫浮置板道床施工工艺的探讨[J].环境工程,2012(S1):84-88.
[10]Jones D.I.G.Handbook of viscoelastic vibration damping[M].New York:John Wiley and Sons,2001.
[11]I.A.Carrascal,J.A.Casado,J.A.Polanco,et al.Dynamic behavior of fastening setting pads[J].Engineering Failure Analysis,2007,14:364-373.
[12]韦凯,周昌盛,王平,等.扣件胶垫刚度的温变性对轮轨耦合随机频响特征的影响[J].铁道学报,2016(1):111-116.
[13]张攀,周昌盛,王平.轨下垫板刚度的时变特性及其影响研究[J].铁道标准设计,2015(9):49-52.
[14]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 21527—2008轨道交通扣件系统弹性垫板[S].北京:中国标准出版社,2008.
[15]翟婉明.车辆-轨道耦合动力学[M].4版.北京:科学出版社,2015.
[16]何况.道床隔振垫的阻尼减振性能分析及应用研究[J].材料开发与应用,2014(6):27-33.