FEM Simulation of Straightening Tongue Rail of High-Speed Turnout
-
摘要: 采用三维实体有限单元法,建立了高速道岔尖轨矫直有限元模型,为高速道岔尖轨矫直提供理论指导.分析了加载支距、加载方式和加载量对尖轨矫直塑性变形、应力及尖轨线形的影响.结果表明:在加载量相同的情况下,随加载支距增大,尖轨产生的塑性变形减小,尖轨矫直从过量逐渐变为不足;在加载支距相同的情况下,随加载量增大,尖轨产生的塑性变形增大,尖轨矫直从不足逐渐变为过量;采用竖向加载并水平约束轨底两侧的矫直方式能明显改善尖轨的线形.最后,建议尖轨矫直采用大支距、小加载量并约束轨底两侧的方式.Abstract: To provide a theoretic reference for straightening the tongue rail of high-speed turnouts,a finite element model for tongue rail was proposed using three dimensional solid finite elements.The effects of loading distance,loading mode and loading value on the plastic deformation,stress and lineshape of tongue rail were analyzed.The research results show that to a given loading value,the plastic deformation of tongue rail decreases with the increase of loading distance,and the straightening value changes gradually from excess to insufficiency;and to a given loading distance,the plastic deformation of tongue rail rises with the increase of loading value,and the straightening value changes gradually from insufficiency to excess.The straightening mode of vertical loading and lateral constraints on rail foot can improve the lineshape of tongue rail.As a result, a great loading distance,a small loading value and lateral constraints on rail foot should be adopted in the straightening of tongue rail.
-
Key words:
- turnout /
- tongue rail /
- straightening /
- plastic deformation /
- FEM analysis
-
何华武.时速250 km级18号道岔设计理论与试验研究[J].铁道学报,2007,29(1):66-71.HE Huawu.Research on the design theories and experiments of the 18# turnout under 250 km/h[J].Journal of the China Railway Society,2007,29(1):66-71.[2] 袁宝军,费维周.时速250 km客运专线铁路60 kg/m钢轨18号单开道岔制造工艺[J].铁道标准设计,2006(增刊):179-181.[3] 汪广志,王守锋.计算机控制尖轨淬火新工艺探讨[J].国外金属热处理,2002,23(1):18-19.[4] 张祖光.矫直对钢轨力学性能的影响[J].钢铁钒钛,1982,3(2):65-70.[5] 张龙华,毕思复,宋文宇.钢轨矫直技术的发展及其在鞍钢重轨生产中的应用[J].鞍钢技术,2004,33(2):36-39.ZHANG Longhua,BE Sifu,SONG Wenyu.Development of straightening steel rail technique and its application in angang heavy rail production[J].Angang Technology,2004,33 (2):36-39.[6] 郭华,邓勇.钢轨矫直压力的有限元计算[J].重型机械,2006,54(5):53-55.GUO Hua,DENG Yong.FEM computation of rail straightening force[J].Heavy Machinery,2006,54(5):53-55.[7] 崔甫.矫直原理与矫直机械[M].北京:冶金工业出版社,2005:113-138.[8] 周存龙,王国栋,刘相华,等.压弯量对轧件矫直变形影响的有限元分析[J].塑性工程学报,2005,13(1):78-81.ZHOU Cunlong,WANG Guodong,LIU Xianghua,et al.The FEM analysis for the effect of intermesh to plate leveling deformation[J].Journal of Plasticity Engineering,2005,13 (1):78-81.[9] 张银花,陈朝阳,周清跃.钢轨屈服强度指标取值研究[J].铁道建筑,2006,46(3):92-94.
点击查看大图
计量
- 文章访问数: 1676
- HTML全文浏览量: 98
- PDF下载量: 341
- 被引次数: 0