轨道刚度变化对高速列车-板式轨道系统振动响应的影响分析  

Analysis of effect of track stiffness change on vibration response of high-speed train and slab track system

作　　者：赫丹[1] 向俊[1] 曾庆元[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《西安建筑科技大学学报（自然科学版）》2006年第4期559-563,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50078006);铁道部科技研究开发计划项目(2001G0292003G043);教育部高等学校博士点科研基金项目(20010533004)

摘　　要：针对板式轨道的结构特点,利用横向有限条与板段单元模拟板式轨道,并考虑轮轨竖向位移衔接条件,基于弹性系统动力学总势能不变值原理及形成系统矩阵的“对号入座”法则,建立了高速列车-板式轨道动力学耦合系统的竖向振动矩阵方程.在此基础上,分析了板式轨道的刚度变化对此系统竖向振动响应的影响规律.计算结果表明,合理的轨道刚度将有利于降低此系统的竖向振动响应.并建议CA砂浆刚度合理的取值范围为1 000—1 500 MPa/m,轨下垫层刚度合理的取值范围为60—80 kN/mm.The lateral finite strip and slab segment element is used to simulate the slab track with the structure features of the slab track considered. Based on the principle of total potential energy with stationary value in elastic system dynamics and the rule of＂ set-in-right-position＂ for formulating system matrixes, the vertical vibration equation set of the highspeed train and slab track time- dependent system are established with the vertical connecting condition between the wheel and the rail considered. The effect of the stiffness change of the slab track on the vertical dynamic characteristics of the system is analyzed. The calculated results demonstrate that the reasonable stiffness of the slab track can effectively reduce the vertical vibration response of the system. The proposed stiffness value ranges of CA mortar and rail pad are 1000-- 1500 MPa/m and 60--80 kN/mm respectively.

关 键 词：板式轨道 高速列车 振动 刚度 

分 类 号：U211[交通运输工程—道路与铁道工程]