快修砂浆对CRTSⅡ型板式轨道结构的动力影响分析  

Analysis of Dynamic Impact of Fast Repair Mortar on CRTS Ⅱ slab-track Structure

作　　者：潘国瑞[1] 刘笑凯[1] 杨荣山[1] 杜华杨 

机构地区：[1]西南交通大学高速铁路线路工程教育部重点实验室,成都610031

出　　处：《铁道标准设计》2015年第4期31-34,共4页Railway Standard Design

基　　金：中国铁路总公司科技研究开发计划项目(2013G008)

摘　　要：以CRTSⅡ型板式无砟轨道为研究对象,基于轮轨系统动力学原理,建立含有快修砂浆的车辆-轨道垂向耦合动力学模型。对比列车以不同速度通过普通砂浆区域与快修砂浆区域的不同工况,旨在研究快修砂浆对轮轨系统动力性能的影响,分析快修砂浆对车辆系统动力特性、轮轨垂向力、轨道动力特性和轨道部件垂向位移的影响。研究结果表明:应用快修砂浆会引起轨道刚度局部变化,列车高速通过时会引起较大的砂浆动应力,对砂浆产生不利影响。对于允许行车速度为350 km/h的线路,建议修复后限速为200 km/h,待砂浆完全达到设计强度和力学性能时再恢复运营速度。This paper aims to study CRTS Ⅱ slab-track to establish vehicle-track vertical coupling dynamics model with fast repair mortar based on the wheel-rail system dynamics principle. The comparison of the different conditions where trains pass through common mortar area and fast repair mortar area at different speed leads to the understanding of the impact of fast repair mortar on the dynamic performance of wheel-rail system, and also the impact of fast repair mortar on the dynamic characteristics of vehicle system, on the wheel-rail vertical force, on the rail dynamic characteristics and on the vertical displacement of rail components. The results show that the fast repair mortar may give rise to local changes of track stiffness and large mortar dynamic stress when trains pass at high speed, adversely affecting the mortar. For a line with designed speed of 350 km/h, the proposed speed limit is 200 km/h after the application of the mortar, and the designed speed is resumed after the mortar reaches designed strength and mechanical properties.

关 键 词：CRTSⅡ型板式轨道 快修砂浆 轮轨垂向力 轨道动力特性 

分 类 号：U213.244[交通运输工程—道路与铁道工程]