车辆重心高度对动力学性能的影响

随着我国铁路货物运输向重载化方向发展，车辆重心高度将产生大范围变化。我国铁路技术标准严格限制重车重心高度，当重心超过2000mm时，车辆要限速运行。在满载条件下，我国铁路现有的罐车实际重心高度普遍接近或高于2000mm。现以GQ70为例，采用SIMPACK仿真软件建立重车车辆模型，分析在不同运行工况下重心高度对车辆动力学性能的影响。计算结果表明，速度越高，车辆重心高度对动力学性能的影响越大，当车辆重心高度在1800mm到2600mm范围内变化时，对横向动力学性能及安全性影响较大，对垂向及轮轨动力学影响较小。

Influence of Gravity Center Height of Loaded Wagon on the Dynamics Performance

Along with the developing of heavy haul freight transportation in China,the gravity center height of wagon will change in large-scale.The railway technology standard in our country limit the gravity center height of wagon strictly,and the velocity of the vehicle will be limited when the gravity center height exceed 2 000 mm.The gravity center height of the loaded tank in our country always closely or exceed 2 000 mm.In this paper,as an example to GQ70,set up the vehicle model based on the SIMPACK,and analyze the influence of different gravity center height on the dynamics performance.The result show that the speed is higher,the impact by gravity center height is bigger,and when the gravity center height varies in 1 800 mm and 2 600 mm,the impact on lateral dynamics performance and safety bigger than the vertical dynamics performance and wheel/track interaction.