关于低温状态下高速动车组运行稳定性的研究
韩辰辰1，曾京1，石怀龙1，曹沛新2
（1.西南交通大学 牵引动力国家重点实验室，四川 成都 610031；2.济南铁路局集团有限公司青岛动车段，山东 青岛 266011）
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。
关键词：转臂定位节点；抗蛇形减振器；温变特性；蛇行稳定性
中图分类号：TH134 文献标志码：A doi：10.3969/j.issn.1006-0316.2019.07.002
文章编号：1006－0316 (2019) 07－0006－06
Study on Operation Stability of High-Speed EMUs in Low Temperature
HAN Chenchen1，ZENG Jing1，SHI Huailong1，CAO Peixin2
( 1.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China;2.Qingdao Railway Depot of Ji'nan Railway Bureau Group Co., Ltd., Qingdao 266011, China )
Abstract：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°C~20°C, 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.
Key words：rotating arms positioning node；yaw damper；temperature feature；hunting stability
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收稿日期：2019－03－02
基金项目：国家自然科学基金资助项目（11790282）
作者简介：韩辰辰（1992－），男，山东菏泽人，工学硕士，主要研究方向为车辆系统动力学；曾京（1963－），男，湖南涟源人，博士，教授、博导，主要研究方向为车辆系统动力学。
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