短波不平顺对高速动车组ATP天线梁弹性振动特征的影响

doi:10.3901/JME.2023.16.223

机械工程学报 ›› 2023, Vol. 59 ›› Issue (16): 223-232.doi: 10.3901/JME.2023.16.223

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短波不平顺对高速动车组ATP天线梁弹性振动特征的影响

魏雪, 任尊松, 曹杰, 吴养民

北京交通大学机电学院北京 100044

收稿日期:2022-08-06 修回日期:2023-02-15 出版日期:2023-08-20 发布日期:2023-11-15
通讯作者: 任尊松(通信作者),男,1969年出生,博士,教授,博士研究生导师。主要研究方向为轨道车辆动力学及结构强度可靠性。E-mail:zsren@bjtu.edu.cn
作者简介:魏雪,男,1995年出生,博士研究生。主要研究方向为车辆系统动力学。E-mail:18116024@bjtu.edu.cn
基金资助:
国家自然科学基金资助项目(11790281)。

Influence of Short Wave Irregularity on Elastic Vibration Characteristics of ATP Antenna Beam of High-speed EMU

WEI Xue, REN Zunsong, CAO Jie, WU Yangmin

School of Mechanical, Electrical & Control Engineering, Beijing Jiaotong University, Beijing 100044

Received:2022-08-06 Revised:2023-02-15 Online:2023-08-20 Published:2023-11-15

摘要/Abstract

摘要： ATP天线梁是位于动车组转向架上的重要部件之一,在动车组实际运行过程中会发生明显的弹性振动。搭建刚柔耦合动力学模型,通过施加扫频激励,获得天线梁的工作模态频率。构造含短波不平顺的随机激励并将其作为模型的输入,采用数值方法,获得天线梁在不同激励参数和不同运行速度下的振动响应。从应力的时域、频域、RMS值以及应力谱等角度分析以上因素对天线梁弹性振动的影响,揭示天线梁发生弹性振动的原因。短波不平顺波长与列车速度形成的激扰频率,与天线梁的工作模态频率接近时会导致其弹性振动加剧。天线梁中部T4位置的应力值随短波不平顺波深呈线性增加,且应力谱中高幅值应力的频次明显增加。通过调整车辆的运行速度以避开天线梁的敏感频率,可使天线梁弹性振动水平明显降低。研究结果对揭示高速动车组ATP天线梁弹性振动机理、提出天线梁弹性振动抑制方法等具有一定的参考意义。

关键词: ATP天线梁, 刚柔耦合, 短波不平顺, 弹性振动, 工作模态

Abstract: ATP antenna beam is one of the important components located on the bogie of EMU, which has obvious elastic vibration during the operation of EMU. The rigid-flexible coupling dynamic model is established, and the operational modal frequency of the antenna beam is obtained by applying sweep excitation. The excitation superimposed with short-wave irregularity is used as the input,and the vibration responses of the antenna beam under different excitation parameters and different operating speeds are obtained by numerical simulation method. The influence of the above factors on the elastic vibration of the antenna beam is analyzed from the time domain, frequency domain, RMS value of stress and stress spectrum, and the reason for the elastic vibration of the antenna beam is revealed. When the excitation frequency formed by the short-wave wavelength and the speed of the train is close to the operational modal frequency of the antenna beam, its elastic vibration will be intensified. The stress value at the T4 position increases linearly with the depth of the short-wave irregularity, and the number of high-amplitude stress in the stress spectrum increases significantly.By adjusting the running speed of the vehicle to avoid the sensitive frequencies of the antenna beam, the elastic vibration of the antenna beam can be significantly reduced. The research results of this paper have certain reference significance for revealing the mechanism of elastic vibration of ATP antenna beam of high-speed EMU and putting forward the method of restraining elastic vibration of antenna beam.

Key words: ATP antenna beam, rigid-flexible coupling, short wave irregularity, elastic vibration, operational modal

中图分类号:

U270

魏雪, 任尊松, 曹杰, 吴养民. 短波不平顺对高速动车组ATP天线梁弹性振动特征的影响[J]. 机械工程学报, 2023, 59(16): 223-232.

WEI Xue, REN Zunsong, CAO Jie, WU Yangmin. Influence of Short Wave Irregularity on Elastic Vibration Characteristics of ATP Antenna Beam of High-speed EMU[J]. Journal of Mechanical Engineering, 2023, 59(16): 223-232.

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短波不平顺对高速动车组ATP天线梁弹性振动特征的影响

Influence of Short Wave Irregularity on Elastic Vibration Characteristics of ATP Antenna Beam of High-speed EMU

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