摘要
为研究高速列车在强侧风作用下安全行驶问题,基于空气动力学和多体系统动力学理论,建立了高速列车空气动力学模型和车辆系统动力学模型.应用该模型计算了不同风向角、不同风速和不同车速下作用于车体上的侧风气动载荷.根据高速列车整车试验规范,以脱轨系数、轮重减载率、轮轴横向力和轮轨垂向力为运行安全指标,分析了头车、中间车和尾车的运行安全性.研究表明:头车的安全性最差,且风向角为90°时,横风情况下最危险.随着车速的增大,最大安全风速急剧减小.当车速为200km/h时,最大安全风速为29.61 m/s;当车速为400 km/h时,最大安全风速为18.87m/s.
In order to study the running security of high-speed trains under strong crosswinds, an aerodynamic model and a vehicle system dynamic model for computing the wind-induced vibration of the high-speed trains were established based on the theories of aerodynamics and muhi-body system dynamics. With the models, the characteristics of crosswind aerodynamic loads acting on the train body under different wind angles, different wind speeds, and different running speeds were calculated. Then, according to the standard of Testing of High-Speed Electric Multiple Unit on Completion of Construction, the operational safety of the head car, middle car, and tail car of the train were analyzed using the operational safety indicators of the derailment coefficient, the load reduction rate, the axle lateral force, and the wheel-rail vertical force. The results show that the security of the head car is lower than the other two cars in all cases; and when the wind angle is 90° in a cross-wind situation, the security of the head car is the worst. The maximum safe wind speed decreases sharply as the train speed increases： when the train speed is 200 kin/h, the maximum safe wind speed is 29.61 m/s, and when the train speed is 400 km/h, the maximum wind speed is 18.87 m/s.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2011年第6期989-995,共7页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(50821063
50823004)
国家973计划资助项目(2007CB714701)
关键词
高速列车
空气动力学
多体系统动力学
风向角
安全风速
high-speed trains
aerodynamics
multi-body system dynamics
wind angle
safe wind speed
