摘要
为研究直线电机轮轨列车行驶于曲线段线路上时,铁路线路条件对列车动力响应的影响规律,以便为修改线路设计规范提供理论依据.建立直线电机轮轨交通列车线路动力学模型,模型中直线电机所受垂向电磁力大小随列车牵引速度和电机气隙的变化而时刻改变.仿真模拟并分析垂向电磁力、车速、曲线半径、超高、轨道不平顺对系统动力响应的影响.结果表明:轨道垂向不平顺和高车速对气隙影响显著;列车通过小半径曲线段时,垂向电磁力对脱轨系数和轮重减载率的消减作用显著;脱轨系数、轮重减载率、轮轨横向力、车体横向加速度、车体横向位移这5类动力响应的最大值,同时受车速、曲线半径、超高影响显著.基于5类动力响应最大值的拟合公式,可对车速、曲线半径、超高取值范围进行合理匹配,并确定曲线地段的合理车辆限界.
The regularity of curved railway line conditions on the dynamic response of linear induction motor(LIM) wheel/rail train was investigated to provide theoretical basis for revising design specifications of railway line. Train-line dynamic model of LIM wheel/rail transit system was established, in which the vertical electromagnetic force of an LIM could change with vehicle speed and motor air gap. Effects of vertical electromagnetic force, vehicle speed, curve radius, superelevation, and track irregularity on train dynamic response were simulated and analyzed. Results show that track irregularity and high speed had significant effects on air gap. When the train passed through curved section of small radius, vertical electromagnetic force could remarkably reduce the values of derailment coefficient and wheel load reduction rate. The maximum values of derailment coefficient, wheel load reduction rate, wheel-rail lateral force, vehicle lateral acceleration, and vehicle lateral displacement were significantly affected by vehicle speed, curve radius, and superelevation. The fitting formulas of 5 kinds of maximum dynamic response were proposed, with which the reasonable matching of vehicle speed, curve radius, and superelevation range could be carried out, and the reasonable vehicle limit in curved section could be determined.
作者
臧传臻
魏庆朝
聂鑫路
ZANG Chuanzhen;WEI Qingchao;NIE Xinlu(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Chongqing Rail Transit Construction Office,Chongqing 400014,China)
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2019年第9期110-116,共7页
Journal of Harbin Institute of Technology
基金
国家自然科学基金(51578054)
北京市自然科学基金(8172040,8182041)
关键词
选线设计
直线电机轮轨交通
列车线路动力学
动力响应
垂向电磁力
railway location design
LIM wheel/rail transit system
train line dynamics
dynamic response
vertical electromagnetic force
