摘要
地铁线路穿越山岭或跨江渡河时,适当提高正线最大坡度标准有利于减少建设成本、降低设计和施工难度.为了研究地铁正线40.0‰最大坡度取值的可行性,结合苏州市轨道交通8号线车线系统特点,采用理论分析、列车纵向动力学、车辆-线路系统动力学以及有限元等方法,从动车功率、列车起动与制动能力、故障列车救援、列车运行状态与动力特性、轨道力学特性等方面分析了地铁正线40.0‰最大坡度对行车特性的影响.研究结果表明:当采用4动2拖B2型车时,地铁正线最大坡度值可采用40.0‰;列车通过40.0‰大坡道地段时,行车安全性、平稳性、列车起动制动以及故障救援能力均能满足要求;钢轨所受最大应力仅为容许应力的37%,纵向最大位移值仅为0.443 mm.
When metro lines cross mountains or rivers,properly increasing the maximum slope standard of the metro main lines will help reduce costs and difficulties of design and construction.In order to study the feasibility of applying the maximum gradient value of 40.0‰on the metro main line,combined with the vehicle-track system properties of Suzhou Rail Transit Line 8,the influence of the 40.0‰maximum gradient value on the running characteristics of trains was analyzed from the power of motor car,starting and braking capacity of trains,rescue of failed trains,train running status and dynamic characteristics,and track mechanical characteristics,by using theoretical analysis,train longitudinal dynamics,vehicle-track system dynamics,and finite element method.Results show that the maximum gradient of a metro main line can be 40.0‰when the B2 type vehicle with 4 motors and 2 trailers is used;when the train passes through the 40.0‰ramp section,the running safety,stability,starting-braking and fault rescue ability of the train meet the requirements;the maximum stress of the rail is only 37%of the allowable stress,and the maximum longitudinal displacement is only 0.443 mm.
作者
王仲林
曾勇
易思蓉
WANG Zhonglin;ZENG Yong;YI Sirong(Guangzhou Metro Design&Research Institute Co.,Ltd.,Guangzhou 510010,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Key Laboratory of High-Speed Railway Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China)
出处
《西南交通大学学报》
EI
CSCD
北大核心
2021年第5期937-944,共8页
Journal of Southwest Jiaotong University
基金
四川省科技计划(2019YFG0460)。
关键词
地铁
正线
最大坡度
安全性
平稳性
行车特性
metro
main line
maximum gradient
safety
stability
running characteristics
