摘要
利用ANSYS建立客运专线42号无砟道岔模型,计算分析大温差条件下的道岔受力与变形特点,同时讨论了转辙器跟端结构形式对道岔受力与变形的影响。计算结果表明:通过设置限位量合适的限位器可控制道岔钢轨的温度力与纵向位移,保证转辙器正常转换;在最大年轨温差较小的地区,尖轨跟端可不设传力结构,这样有利于道岔温度力的放散;尖轨跟端设置间隔铁时,须检算间隔铁部件和基本轨的材料强度是否满足要求。
The model of No.42 ballastless turnouts on passenger-dedicated line was established using ANSYS finite element software,stress and deformation characteristics of turnout under big temperature difference was analyzed,and the influence of different switch heel structure on the turnout stress and deformation was discussed.Research conclusions are that setting displacement restrictors with appropriate limit to control temperature force and longitudinal displacement of switch rail could ensure the normal conversion of switch,switch rail heels could not be set with power transmission structure in relatively smaller maximum annual rail temperature difference area,which is propitious to release switch temperature stress,if switch rail heel blocks are used as the anti-creep devices,material strength of blocks and stock rails should be tested in order to meet the requirements.
出处
《铁道建筑》
北大核心
2015年第11期100-103,共4页
Railway Engineering
关键词
42号道岔
有限元计算
温度力
道岔变形
No.42 turnout
Finite element calculation
Temperature stress
Turnout deformation
