温度梯度作用下板式无砟道岔岔区板力学特性分析  

Mechanical characteristic of slab track on switch area under temperature gradient

作　　者：唐进锋[1] 尹华拓[1] 曾志平[1] 唐长根[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2011年第1期24-28,共5页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(50908236);湖南省自然科学基金资助项目(09JJ4022);高等学校博士学科点专项科研基金资助课题(20090162120038);中国博士后科学基金特别资助项目(201003521)

摘　　要：采用有限单元方法,建立了道岔区板式无砟轨道温度力的计算模型,结合热分析及结构分析,对道岔板进行温度梯度荷载作用下的翘曲分析,并对底座板弹性模量、底座板厚度、道岔板厚度、道岔板宽度的变化对道岔板纵向应力和位移的影响规律进行了分析。研究表明:道岔区板式无砟轨道的温度力和位移受底座板弹性模量变化的影响较大,道岔板厚度对结构受力也有较大的影响,而底座板厚度和道岔板宽度变化对结构的影响要居次要地位。With the help of Finite Element Method,the model of slab track on switch area under temperature stress was established.Integrating thermal analysis with structural analysis,this paper described the switch board warping under temperature gradient.The law of main material parameters affecting on mechannic characteristic of slab track on switch area were also analyzed,such as the elastic modulus of base plate,the thickness of the base plate,the thickness and width of turnout slab.Results show that the temperature stress and displacement of the switch plate is deeply influenced by the elastic modulus of base plate and the thickness of turnout slab,while the width of turnout slab and the thickness of the base plate play a secondary role in the change of longitudinal force and displacement.

关 键 词：高速铁路 板式无砟轨道 道岔 有限单元法 

分 类 号：U213.2[交通运输工程—道路与铁道工程]