预制式浮置板轨道隔振器/剪力铰设计参数优化研究  

Optimization of design parameters for prefabricated floating slab track isolator/shear hinge

作　　者：刘文武 赵才友[2] 贺利工 罗信伟 LIU Wenwu;ZHAO Caiyou;HE Ligong;LUO Xinwei(Guangzhou Metro Design and Research Institute Co.,Ltd.,Guangzhou 510010,China;Key Laboratory of High Speed Railway Line Engineering,Southwest Jiaotong University,Ministry of Education,Chengdu 610031,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]西南交通大学高速铁路线路工程教育部重点实验室,四川成都610031

出　　处：《铁道科学与工程学报》2024年第11期4497-4506,共10页Journal of Railway Science and Engineering

基　　金：广州地铁设计院科研资助项目。

摘　　要：为减小列车通过板缝时车轨振动响应、提升预制式浮置板轨道减振性能,以某地铁预制式浮置板轨道为例,采用ABAQUS有限元软件建立列车-预制式浮置板轨道-隧道刚柔耦合动力学模型,计算预制式浮置板总支撑刚度恒定的条件下隔振器纵向间距2.4/1.8/1.2 m、横向间距1.84/1.64/1.44/1.24 m、剪力铰数量为3/4/5、布置形式为中置式/侧置式/上置式时车辆、浮置板轨道、隧道壁源强振动响应。通过对比分析各工况浮置板板端位移及隧道壁源强振动响应,提出了预制式浮置板隔振器布置、剪力铰布置的优化建议。研究结果表明:在预制式浮置板总支撑刚度恒定的情况下,适当增加隔振器的数量,可以降低浮置板板端位移,提高行车平稳性,同时不显著增加隧道壁源强振动。在1.24~1.84 m范围内,随着隔振器横向间距的增加,浮置板板端位移、隧道壁源强振动出现了先减少后增加的变化趋势,隔振器横向间距应存在一个最优值。随着预制式浮置板剪力铰数量的增加,浮置板板端位移和隧道壁源强振动均逐渐降低,但降低幅度亦有所下降,剪力铰对板端位移、源强振动的抑制作用应存在一个上限。在预制式浮置板轨道剪力铰数量不变的情况下,布置形式为上置式和侧置式时板端位移要小于中置式。研究成果为进一步优化预制式浮置板轨道的设计参数提供了参考依据。In order to reduce the vibration of the track when the train passes over the slab gap and improve the vibration reduction performance of the prefabricated floating slab track,a rigid-flexible coupling dynamic model of train-prefabricated floating slab track-tunnel was established using ABAQUS finite element software,taking a certain subway as an example.The vibration of vehicle,floating slab track,and tunnel wall were calculated by the model,considering the longitudinal spacing of isolators was 2.4/1.8/1.2 m,the lateral spacing was 1.84/1.64/1.44/1.24 m,respectively under the condition of constant total support stiffness of the prefabricated floating slab,and the number of shear hinges was 3/4/5,and the shear hinge layout was central/side/upper position.By comparing and analyzing the displacement at the end of the floating slab and the vibration response of the tunnel wall under various working conditions,optimization suggestions for the arrangement of prefabricated floating slab isolators and shear hinges were proposed.The research results are as follows.Under the condition of constant total support stiffness of prefabricated floating slabs,the increase of number of isolators appropriately can reduce the displacement of the floating slab end,improve driving stability,and not significantly increase the vibration of the tunnel wall.Within the range of 1.24 m to 1.84 m,as the lateral spacing of the isolator increases,the displacement of the floating slab end and the vibration of the tunnel wall show a trend of first decreasing and then increasing,thus there should be an optimal value for the lateral spacing of the isolator.As the number of prefabricated floating slab shear hinges increases,the displacement at the end of the floating slab and the vibration of the tunnel wall gradually decrease,but the magnitude of the varying also decreases,thus there should be an upper limit of the vibration reduction capacity of shear hinges for the end of the slab and the tunnel wall.When the number of shear hinges on the prefabr

关 键 词：地铁 预制式浮置板轨道 优化设计 隔振器 剪力铰 

分 类 号：U213.2[交通运输工程—道路与铁道工程]