道岔缓和曲线尖轨切削方式选型的动力学研究  

Dynamic analysis of cutting mode selection for switch blade with transition curve

作　　者：曹洋[1] 王平[2] 黄明[1] 

机构地区：[1]福州大学土木工程学院,福建福州350116 [2]西南交通大学高速铁路线路工程教育部重点实验室,四川成都610031

出　　处：《福州大学学报（自然科学版）》2015年第2期249-254,共6页Journal of Fuzhou University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51078320);福州大学科技发展基金资助项目(650069)

摘　　要：以轮轨系统动力学理论为基础,建立车辆-转辙器动力耦合模型,计算并分析42号缓圆缓型道岔前缓和曲线尖轨选取五种不同切削方式时,轮轨系统动力指标及钢轨磨耗变化情况.结果表明:利用动力学方法评价各种缓和曲线尖轨切削方式的优劣性,能够使尖轨选型更加可靠;缓圆缓型道岔中选用半切线型缓和曲线尖轨,可获得较好的行车性能、转辙器结构稳定性和钢轨磨耗性能,部分设计条件下也可依照具体要求采用切线型尖轨;对运营中道岔转辙器结构动力性能的分析,需考虑几何不平顺等因素的共同作用.A vehicle - switch dynamic coupling model was established based on the wheel - rail system dynamic theory ; taken No. 42 turnout with easement - circular - easement curve for example, five cutting modes of switch blade with transition curve were respectively considered into the analysis of wheel/rail dynamic responses and rail wearing. Results show that it is reasonable to apply the dynamic method to evaluate various cutting modes of switch blade, which makes the cutting mode selection more reliable; the turnout with easement -circular- easement curve can get good train -running per- formance, switch stability and rail wear performance when the semi - tangent switch blade with transi- tion curve is selected, and sometimes tangent switch blade is applied when some special design condi- tions are considered; for turnouts in operation, geometry irregularity and other factors need to be con- sidered into the calculation of turnout switch dynamic responses.

关 键 词：缓和曲线尖轨 切削方式 动力响应 磨耗指数 有限单元法 

分 类 号：U213.6[交通运输工程—道路与铁道工程]