扣件纵向阻力对地铁道岔力学特性的影响研究  

Research on the Influence of Longitudinal Resistance of Fasteners on Mechanical Characteristics of Metro Turnouts

作　　者：曾志平[1] 唐启辉 黄相东 田春雨 胡籍 ZENG Zhiping;TANG Qihui;HUANG Xiangdong;TIAN Chunyu;HU Ji(Central South University,Changsha,Hunan 410075,China;China Railway Engineering Design and Consulting Group Co.Ltd,Beijing 100055,China)

机构地区：[1]中南大学,长沙410075 [2]中铁工程设计咨询集团有限公司,北京100055

出　　处：《铁道工程学报》2023年第11期29-35,共7页Journal of Railway Engineering Society

基　　金：中国铁路南昌局集团有限公司科技研究开毁计划课题(202007)。

摘　　要：研究目的:扣件是地铁道岔关键传力部件,其纵向阻力对道岔各钢轨的受力与位移有着重要影响。为明确不同扣件轨下垫板、不同纵向阻力下地铁道岔的纵向力学特性,对其扣件进行试验及数值模拟分析。研究结论:(1)相比橡胶垫板,采用聚酯垫板时,道岔基本轨纵向位移减小13%以上,尖轨纵向位移减小2%左右,道岔各钢轨纵向受力变化不大;(2)随着扣件纵向刚度的增加,道岔结构的纵向位移和基本轨纵向受力逐渐减小,虽然导轨温度力略有增大,但增幅很小,不会影响结构安全性;(3)在地铁道岔中采用聚酯垫板并适当增大扣件纵向刚度是合理的优化方向;(4)本研究成果可用于地铁道岔扣件轨下垫板选型以及阻力优化设计。Research purposes:The fasteners are key component for transferring force in metro turnout,and its longitudinal resistance has an important impact on the force and displacement of each rail of the turnout.In order to clarify the longitudinal mechanical characteristics of metro turnout under different fastener rail pads and different longitudinal resistances,experimental tests and numerical simulation analysis were conducted on the fasteners.Research conclusions:(1)Compared with rubber pads,using polyester pads can reduce the longitudinal displacement of the basic rail of the turnout by more than 13%,reduce the longitudinal displacement of the guide rail by about 2%,and the longitudinal force on each rail of the turnout changes little.(2)As the longitudinal stiffness of the fastener increases,the longitudinal displacement of the turnout structure and the longitudinal force on the basic rail gradually decrease,although the temperature force of the guide rail increases slightly,but the increase is very small and will not affect the structural safety.(3)Using polyester pads in metro turnout and appropriately increasing the longitudinal stiffness of fasteners is a reasonable direction for optimization.(4)The research results can be applied to the selection of fastener rail pads for metro turnout fasteners and optimization design of resistance.

关 键 词：地铁道岔 扣件纵向阻力 数值模拟 纵向受力位移 

分 类 号：U213.6[交通运输工程—道路与铁道工程]