市域快线预制钢弹簧浮置板轨道振动特性研究  

Vibration performance of a prefabricated steel-spring floating-slab track for urban express rail transit

作　　者：郑翔 罗信伟 李平 朱文海 ZHENG Xiang;LUO Xin-wei;LI Ping;ZHU Wen-hai(Guangzhou Metro Design&Research Institute Co.Ltd.,Guangzhou 510010,China;Gerb(Qingdao)Vibration Control Co.Ltd.,Qingdao 266108,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510010 [2]隔而固(青岛)振动控制有限公司,山东青岛266108

出　　处：《振动工程学报》2021年第5期951-958,共8页Journal of Vibration Engineering

基　　金：广州市越秀区科技计划项目(2017-GX-024)。

摘　　要：为探究钢弹簧浮置板轨道在市域快线中的适用性,有效模拟市域列车与浮置板轨道之间的动态相互作用,进行浮置板轨道结构的参数优化分析。基于车辆-轨道耦合动力学理论,建立CRH6动车-预制钢弹簧浮置板轨道耦合动力学模型,该模型将车辆视为由车身、车架和轮组组成的多刚体系统,考虑了各部分的横向、纵向、侧滚、摇头和点头运动。将钢轨视为弹性点支承的伯努利-欧拉梁,根据实际扣件节点间距布置钢轨支撑点,考虑左右钢轨的垂向、侧向和转动自由度。将浮置板的垂直方向视为弹性地基上的双向弯曲弹性板,水平方向视为刚体,考虑其平移和转动自由。考虑混凝土基础为弹性基础上的双向弯曲弹性板。轮轨之间的法向力由赫兹非线性弹性接触理论确定,切向力由非线性蠕变理论确定。研究表明,传统上用于低速线路的预制钢弹簧浮置板式轨道实际上可以用于市域快线乃至市域快线领域,预制式钢弹簧浮置板轨道可以在满足列车运营安全的前提下达到显著的减振效果。侧置式隔振器的发明是提高浮置板轨道稳定性的新探索,相比传统单纯增加浮置板轨道厚度,进而提高轨道质量并提升其稳定性的做法,采用浮置板侧置隔振器无疑是经济而有效的。因此,该预制式钢弹簧浮置板轨道能够满足市域快线高速行车的要求,同时研究成果可为时速160 km预制钢弹簧浮置板道床的动力学设计提供支撑。In order to explore the applicability of the steel spring floating slab track in urban express rail transit,the dynamic interaction between the CRH6 train and the floating slab track was simulated effectively,and the parameter optimization analysis of the floating slab track structure was also performed.Based on the vehicle-track coupled dynamics theory,the CRH6 train-precast steel spring floating slab track coupled dynamic model was established.In the model,the vehicle is regarded as a multi-rigid body system consisting of a car body,a frame and a wheel set.Meanwhile,the lateral,vertical,side-rolling,head-shaking,and the nodding movements of each part are considered.Regarding the rail as the Bernoulli-Euler beam supported by the elastic points,the rail support points are arranged according to the actual fastener node spacing,and the vertical,lateral and rotational degrees of freedom of the left and right strand rails.The vertical direction of the floating slab is regarded as a two-way bending elastic sheet on an elastic foundation,and the horizontal direction of the floating slab is regarded as a rigid body,considering its translational and rotational freedom;the concrete foundation is also regarded as a two-way bending elastic sheet on the elastic foundation.The normal force between the wheel and rail is determined by the Hertz nonlinear elastic contact theory,and the tangential force is determined by the nonlinear creep theory.Research shows that the traditional prefabricated steel spring floating slab track used for low-speed lines can be used in the urban express rail transit and the high-speed railways.The prefabricated steel spring floating slab track for this project can achieve significant vibration reduction effects under the premise of train operation safety.The invention of the side-mounted vibration isolator is a exploration to improve the stability of the floating slab track.Compared with the traditional method of increasing the thickness of the floating slab track to improve the quality and the sta

关 键 词：车辆-轨道耦合动力学 轨道 市域快线轨道交通 新型预制钢弹簧浮置板 振动特性 

分 类 号：U213.2[交通运输工程—道路与铁道工程]