关于低温状态下高速动车组运行稳定性的研究
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摘要
为了研究低温状态下高速动车组的蛇行稳定性,对我国某高速动车组的转臂定位节点和抗蛇行减振器分别进行了试验和仿真分析。试验结果表明,在正常工作温度范围内,温度越低,转臂定位节点的动态刚度与动态阻尼越大。在-50～20℃范围内,随着温度的降低,抗蛇行减振器动态刚度逐渐增加,温度越低,减振器动态刚度变化越明显;卸荷速度前,温度越低,动态阻尼越大;卸荷速度后,温度越低,动态阻尼越小;温度越低,动态阻尼变化越显著。仿真结果表明,随着温度的降低,车辆运行的蛇行临界速度先增大后减小,但是始终高于设计时速,说明温度的变化不会使列车失稳。
The field test and simulation analysis of the rotating arms positioning node and yaw damper were accomplished to analyze the impact of low temperature on operation stability of high-speed EMUs. The test results show that the dynamic stiffness and dynamic damping of the rotating arms positioning node increase with the decrease of temperature within the normal operating temperature range. In the range of-50℃～20℃, with the decrease of temperature, the dynamic stiffness of the yaw damper gradually increases. The lower the temperature, the more obvious the changes of the dynamic stiffness of the damper. Before the unloading speed,the lower the temperature, the greater the dynamic damping; after the unloading speed, the lower the temperature, the lower the dynamic damping. The lower the temperature, the more significant the dynamic damping changes. The simulation results show that with the decrease of temperature, the critical hunting speed increases first and then decreases, but is always higher than the design speed, which indicats that the temperature change will not destabilize the train.
The field test and simulation analysis of the rotating arms positioning node and yaw damper were accomplished to analyze the impact of low temperature on operation stability of high-speed EMUs. The test results show that the dynamic stiffness and dynamic damping of the rotating arms positioning node increase with the decrease of temperature within the normal operating temperature range. In the range of-50℃～20℃, with the decrease of temperature, the dynamic stiffness of the yaw damper gradually increases. The lower the temperature, the more obvious the changes of the dynamic stiffness of the damper. Before the unloading speed,the lower the temperature, the greater the dynamic damping; after the unloading speed, the lower the temperature, the lower the dynamic damping. The lower the temperature, the more significant the dynamic damping changes. The simulation results show that with the decrease of temperature, the critical hunting speed increases first and then decreases, but is always higher than the design speed, which indicats that the temperature change will not destabilize the train.
引文
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[2]崔泽安,徐腾养,邬平波.抗蛇行减振器动态特性分析以及对车辆动力学性能影响研究[J].机械,2018,45(2):1-5.
[3]徐腾养,池茂儒,田向阳,等.抗蛇行减振器内部油液温度对其动态特性的影响[J].机车电传动,2016(6):43-46.
[4]洪从鲁,可心萌,徐腾养,等.抗蛇行减振器温变特性及对车辆安全性影响[J].现代制造工程,2018(9):11-16.
[5]高红星,徐腾养,池茂儒,等.抗蛇行减振器温变特性及其对车辆稳定性影响[J].机车电传动,2017(5):48-52.
[6]李密,邬平波,王玮,等.轴箱转臂定位节点温变特性对车辆动力学性能的影响[J].噪声与振动控制,2018,38(4):111-115.