摘要
基于车辆-轨道耦合动力学理论,建立了考虑浮置板剪力铰连接作用下的列车-钢弹簧浮置板轨道空间耦合动力学模型。将浮置板视为弹性薄板,同时考虑剪力铰对浮置板的横向与垂向约束作用,分析了直线和曲线线路条件下剪力铰对列车-轨道耦合系统动力学行为的影响。结果表明:浮置板剪力铰能明显改善轮轨动力相互作用,缓解列车通过浮置板接缝时轮轨横向力和垂向力产生的冲击;浮置板剪力铰对减小地铁列车的振动也有一定的改善作用,其对轮对振动的影响最大,对构架振动的影响次之,对车体振动的影响最小;地铁列车通过直线线路时,浮置板剪力铰对板端扣件受力的改善作用明显;地铁列车通过曲线线路时,剪力铰对浮置板的横向位移、水平面内转动角和钢弹簧横向力的改善作用比较明显,对扣件横向力影响较小。
Based on the theory of vehicle-track coupled dynamics, a 3-D dynamic model for a train-track of steel spring floating slab coupled system was established under the connection action of shear hinges of floating slab. The floating slab was assumed to be an elastic thin plate. Vertical and lateral constraint actions of shear hinges on floating slab were considered simultaneously to analyze effects of shear hinges on dynamic behavior of a train-track coupled system under conditions of straight railway line and curve one. The results showed that shear hinges of floating slab can obviously improve wheel-rail interaction and release impacts of wheel and rail's lateral and vertical forces during train passing gaps between two adjacent floating slabs;subway train vibration can be improved by shear hinges to a certain extent, effects of shear hinges on wheel-pair vibration are the maximum, those on frame vibration are the second, and those on car body are the minimum;under the condition of straight railway line, shear hinges can obviously improve forces exerted on fasteners at both ends of floating slab, and under the condition of curve one, shear hinges have smaller effects on fasteners' lateral forces while they can more obviously improve floating slab * s lateral displacements and rotary angles in horizontal plane as well as lateral forces of steel springs.
作者
杨建近
朱胜阳
翟婉明
YANG Jianjin;ZHU Shengyang;ZHAI Wanming(State Key Lab of Traction Power, Southwest Jiaotong University, Chengdu 610031, China)
出处
《振动与冲击》
EI
CSCD
北大核心
2019年第11期1-8,共8页
Journal of Vibration and Shock
基金
国家自然科学基金(11790283
51708457)
四川省应用基础研究面上项目(2017JY0215)
