STUDY ON VIBRATION FATIGUE CHARACTERISTICS OF SAFETY HANGER FOR METRO VEHICLE

ZHANG FuBing; WU PingBo; QU Sheng

doi:10.16579/j.issn.1001.9669.2018.04.08

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STUDY ON VIBRATION FATIGUE CHARACTERISTICS OF SAFETY HANGER FOR METRO VEHICLE

更新时间：2022-09-22

- STUDY ON VIBRATION FATIGUE CHARACTERISTICS OF SAFETY HANGER FOR METRO VEHICLE
- Journal of Mechanical Strength Vol. 40, Issue 4, Pages: 810-814(2018)
- 作者机构：
  
  1. 西南交通大学牵引动力国家重点试验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2018.04.08
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ZHANG FuBing, WU PingBo, QU Sheng. STUDY ON VIBRATION FATIGUE CHARACTERISTICS OF SAFETY HANGER FOR METRO VEHICLE. [J]. 40(4):810-814(2018)
DOI：

ZHANG FuBing, WU PingBo, QU Sheng. STUDY ON VIBRATION FATIGUE CHARACTERISTICS OF SAFETY HANGER FOR METRO VEHICLE. [J]. 40(4):810-814(2018) DOI： 10.16579/j.issn.1001.9669.2018.04.08.

摘要

为分析某地铁车辆上轮对安全吊开裂原因,对安全吊分别进行了模态分析和模态试验,最终确定了存在340Hz和990 Hz附近的固有频率。同时为了获得运营过程中安全吊的加速度和动应力水平,对该车辆进行了线路跟踪试验。根据试验数据发现,由于轨道波磨激励的存在导致安全吊的加速度和动应力在340 Hz左右的能量明显,说明一阶模态被激发产生了共振。对比轨道打磨前后的动应力数据对安全吊的疲劳寿命进行评估发现,轨道波磨产生的疲劳损伤极大的缩短了安全吊的使用寿命。

Abstract

Aiming at analyzing the reason of damage of safety hanger on metro vehicle,the finite element model and modal test was conducted for modal analysis.Finally,the natural modes near 340 Hz and 990 Hz were obtained.At the same time,in order to obtain the acceleration and dynamic stress level of the safety hanger in the operation process,a line tracking test was performed on the vehicle.According to the test data,it was found that due to the presence of rail corrugation excitation,the energy of the dynamic stress and acceleration at 340 Hz increased sharply,which indicates that the first-order mode was excited to generate resonance.According to the dynamic stress data before and after the rail corrugation,the fatigue life of the safety hanger was evaluated and compared.It is found that the fatigue damage caused by the rail corrugation greatly shortens the service life of the safety hanger.

关键词

安全吊振动疲劳模态分析轨道波磨疲劳寿命

Keywords

Safety hangerVibration fatigueModal analysisRail corrugationFatigue life

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College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics

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