一系定位刚度对转向架群配置高速货运动车组车辆动力学性能影响研究

为了提高我国铁路对大型、重型、贵重货物的快捷高效运输能力,中车唐山机车车辆有限公司研发了转向架群配置的高速货运动车组.基于多体系统动力学理论,建立了转向架群配置的高速货运动车组车辆系统动力学模型,确定了转向架群配置高速货运动车组车辆的非线性临界速度,研究了一系定位刚度对车辆运行非线性临界速度的影响;同时,利用建立的模型研究了一系定位刚度对车辆运行安全性指标以及平稳性指标的影响.研究结果表明,非线性临界速度随着一系纵向定位刚度的增加先增大后减小,而随着一系横向定位刚度的增加整体呈现减小趋势;车辆横向运行平稳性指标随着一系纵向定位刚度的增加有所增加,而垂向平稳性指标基本保持不变;一系横向定位刚度对车辆运行平稳性指标影响不明显.

EFFECT OF PRIMARY POSITIONING STIFFNESS ON VEHICLE DYNAMICS PERFORMANCE OF HIGH-SPEED FREIGHT EMU EQUIPPED WITH FOUR DOUBLE-AXLE BOGIES

In order to achieve a fast and efficient transportation capacity of China"s railways for large, heavy and valuable goods, CRRC TangShan Co., Ltd. developed a high-speed freight Electric Multiple Units (EMU) equipped with four double-axle bogies. Based on the theory of multi-body system dynamics, this paper established a vehicle dynamics model of the high-speed freight EMU equipped with four double-axle bogies, and studied the influence of primary positioning stiffness on the nonlinear critical speed of the vehicle; At the same time, the influence of primary positioning stiffness on vehicle safety index and stationarity index were studied. The results showed that the nonlinear critical velocity firstly increases and then decreases with the increase of the primary longitudinal positioning stiffness, and monotonically decreases with the increase of the primary lateral positioning stiffness. The lateral stability index of the vehicle increases with the increase of the primary longitudinal positioning stiffness, while the vertical stability index is nearly unchanged. The primary lateral positioning stiffness of the vehicle has no significant effect on the vehicle stability index.