铁道标准设计2025，Vol.69Issue(4)：57-64,8.DOI:10.13238/j.issn.1004-2954.202308090001
DZⅢ型扣件系统组装横向刚度测试与仿真
Lateral Stiffness Test and Simulation of DZⅢ Fastening System Assembly
摘要
Abstract
To investigate the lateral stiffness of the fastening system and its main influencing factors for better control of the actual lateral deformation of the rail,this study takes the DZⅢ fastening system as an example.Firstly,laboratory tests were conducted to measure the lateral force-displacement curves of the structure above the iron baseplate and the combined structure considering both above and below the plate.A comparative analysis was conducted to examine the differences in lateral stiffness between the above-the-plate structure and the combined structure,as well as the effect of the elastic baseplate on the lateral stiffness of the fastening system.The test results showed that the lateral stiffness of the fastening system exhibited distinct nonlinear characteristics,and the baseplate and its design characteristics significantly affected the lateral stiffness of the fastening system.Secondly,taking the fastening system with a Type B elastic baseplate that experienced rail base slippage as an example,a three-dimensional finite element model was established.Based on simulation and test verification,this study investigated the effect of the underplate's friction coefficient and surface structure on the lateral stiffness of the fastening system.The main conclusions are as follows:(1)increasing the friction coefficient of the underplate significantly improves the ability of the fastening system to resist lateral loads within the common range.Taking the lateral load resisted by the fastening system when the rail lateral displacement reaches 1.5 mm as an example,as the friction coefficient of the underplate pad increases from 0.2 to 0.8,the lateral load resisted by the fastening system increases from 3.26 kN to 6.40 kN,doubling the lateral load resistance of the fastening system.(2)The grooved underplate effectively controls the lateral displacement of the rail within the common range of lateral loads and improves the ability of the fastening system to resist lateral loads.Taking the lateral load resisted by the fastening system when the rail lateral displacement reaches 1.5 mm as an example,the lateral load resistance of the fastening system using the grooved underplate increases by 47.3％and 55％,respectively,compared to the underplate with a convex array structure.关键词
扣件系统/横向刚度/弹性垫板/板下垫板/室内试验/仿真模型Key words
fastening system/lateral stiffness/elastic base plate/underplate/laboratory test/simulation model分类
交通工程引用本文复制引用
谢朝川,韦凯,王显,刘延滨,谭滔..DZⅢ型扣件系统组装横向刚度测试与仿真[J].铁道标准设计,2025,69(4):57-64,8.基金项目
国家自然科学基金面上项目(51978583) （51978583）
