摘要
基于60 kg/m钢轨12号单开道岔的结构优化需求,针对既有道岔转换设计方法的不足,对60 kg/m钢轨12号单开道岔的转换设计进行了优化研究。基于有限元理论建立了道岔转换精细化仿真计算模型,可基于尖轨斥离状态的实际受力确定斥离线形,与实际情况更为相符,也更偏于安全。在此基础上,对12号道岔牵引点动程的合理取值方案进行了深入研究,基于所建立的道岔转换模型,通过数值仿真试验系统分析了不同牵引点动程条件下的最小轮缘槽宽度及第一、第二牵引点动程匹配关系的变化规律,提出了第一牵引点动程160 mm、第二牵引点动程90 mm的优化方案,可在满足最小轮缘槽要求的同时,使尖轨的变形总体较为协调。基于所提出的设计方案,进行了新型60 kg/m钢轨12号单开道岔的试制和试铺,并开展了尖轨转换试验。测试结果表明:新型12号道岔第一牵引点转换力为2400 N左右,第二牵引点转换力为3300 N左右,优于既有60 kg/m钢轨12号主型道岔;最小轮缘槽满足车辆安全通过的要求,且有3 mm~4 mm的安全裕量。试验结果证明了该文提出的转换设计方法和参数优化方案的合理性、有效性。
To optimize the structure of No.12 single turnouts of 60 kg/m rails,we conducted a study to address the issues associated with existing turnout switching design methods.By finite element simulation,we established a refined calculation model for turnout switching.The model can determine the plane alignment of a switch rail separated from the stock rail based on the actual force acting upon the switch rail.The obtained plane alignment was consistent with the actual situation,and was more reliable.Based on the established turnout switching model,the minimum flangeway width and dynamics between the strokes of the first and second traction points under different conditions were analyzed by numerical simulations.Accordingly,we proposed an optimized scheme that takes 160 mm and 90 mm as the stroke values for the first and second traction points,respectively.The scheme helped to meet the requirements for minimum flangeway width while making the deformation of the switch rail more even.Based on the proposed design method,trial production and laying of the new No.12 single turnout with a 60 kg/m rail was conducted,and a switching test was performed.The switching forces at the first and second traction points of the new No.12 turnout were approximately 2400 N and 3300 N,respectively,which were better than those of existing No.12 turnouts with 60 kg/m rails.Besides,the minimum flangeway width satisfied the requirement for safe vehicle passage with a safety margin of 3 mm~4 mm.The test results proved the effectiveness of the proposed turnout switching design method and parameter optimization scheme.
作者
王璞
杨东升
赵振华
王树国
WANG Pu;YANG Dong-sheng;ZHAO Zhen-hua;WANG Shu-guo(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《工程力学》
EI
CSCD
北大核心
2023年第7期249-256,共8页
Engineering Mechanics
基金
国家自然科学基金项目(51878661)
国铁集团科技研究开发计划系统性重大项目(P2021G053)
中国铁道科学研究院集团有限公司院基金重大项目(2022YJ177)。
关键词
单开道岔
道岔转换计算模型
实际斥离线形
牵引点动程优化
道岔转换试验
single turnout
turnout switching calculation model
actual plane alignment of separated switch rail
traction point stroke optimization
turnout switching test
