考虑车体刚柔耦合振动的高速铁路轨道不平顺敏感波长研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (15) : 79-89.

论文

姜培斌1,凌亮1，丁鑫2，王开云1，翟婉明1

作者信息 +

Track irregularity sensitive wavelengths of high-speed railway considering flexible vibration of vehicle body

JIANG Peibin1, LING Liang1, DING Xin2, WANG Kaiyun1, ZHAI Wanming1

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文章历史 +

摘要

随着高速列车的轻量化设计，列车在运行过程中车体的柔性振动也越来越显著，当特定波长的轨道几何不平顺激励频率与车辆系统固有振动频率相近时，将会引起车辆系统与不平顺激励发生共振，从而影响列车运行安全与乘坐舒适度。为研究高速铁路轨道几何不平顺敏感波长，基于车辆-轨道耦合动力学理论，建立考虑柔性车体的高速列车-轨道耦合动力学模型，系统研究不同类型轨道不平顺波长变化对高速列车动力学性能的影响。在此基础上，分析不同行车速度条件下不同类型轨道几何不平顺的最不利波长和敏感波长范围。结果表明，车体柔性振动对高速铁路轨道几何不平顺敏感波长影响显著；不同行车速度条件下不同类型轨道几何不平顺的最不利波长和敏感波长范围均有所不同；高速铁路轨道几何不平顺敏感波长存在三个显著波段，其中3~10 m的短波敏感波长主要与车体柔性模态相关，10~60 m的中波敏感波长主要与构架刚体模态相关，而60~140 m的长波敏感波长主要与车体刚体模态有关。

Abstract

With lightweight design of high-speed train, flexible vibration of vehicle body becomes more and more significant in running process. When the excitation frequency of track geometric irregularity with a specific wavelength is close to natural vibration frequencies of the vehicle system, the resonance between the vehicle system and the irregularity excitation can happen to affect the train operation safety and riding comfort. Here, to study the sensitive wavelength of high-speed railway track geometric irregularity, based on the vehicle-track coupled dynamics theory, a high-speed train -track coupled dynamic model considering flexible vibration of car body was established, and effects of wavelength variation of different types of track irregularity on dynamic performance of high-speed train were systematically studied. Then, the most unfavorable wavelength and sensitive wavelength range of different types of track geometric irregularity under different operating speeds were analyzed. The results showed that flexible vibration of car body significantly affects sensitive wavelength of track geometric irregularity of high-speed railway; the most unfavorable wavelength and sensitive wavelength range of different types of track geometric irregularity are different under different operating speeds; there are 3 significant wave bands of sensitive wavelength of track geometric irregularity of high-speed railway, the sensitive wavelength within short wave range of 3-10 m is mainly related to flexible modes of car body, the sensitive wavelength within medium wave range of 10-60 m is mainly related to rigid body modes of bogie, and the sensitive wavelength within long wave range of 60-140 m is mainly related to rigid modes of car body.

导出引用

姜培斌,凌亮，丁鑫，王开云，翟婉明. 考虑车体刚柔耦合振动的高速铁路轨道不平顺敏感波长研究[J]. 振动与冲击, 2021, 40(15): 79-89

JIANG Peibin, LING Liang, DING Xin, WANG Kaiyun, ZHAI Wanming. Track irregularity sensitive wavelengths of high-speed railway considering flexible vibration of vehicle body[J]. Journal of Vibration and Shock, 2021, 40(15): 79-89

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