Fatigue life study of the door on the new-type 160 km/h railway box wagon

MA Chengcheng; FU Maohai; AN Qi; WANG Yang

doi:10.13890/j.issn.1000-128X.2023.04.007

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Fatigue life study of the door on the new-type 160 km/h railway box wagon

Railway Rolling Stock | 更新时间：2024-08-02

- Fatigue life study of the door on the new-type 160 km/h railway box wagon
- Electric Drive for Locomotives Issue 4, Pages: 50-56(2023)
- 作者机构：
  
  1.中车制动系统有限公司技术研发中心，山东青岛 266031
  2.西南交通大学机械工程学院，四川成都 610031
  3.大连交通大学机械工程学院，辽宁大连 116028
  4.重庆中车四方所智能装备技术有限公司重庆研发中心，重庆 400000
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2023.04.007
  CLC： U272.1
- Published：10 July 2023，
  
  Received：17 November 2020，
  
  Revised：13 December 2022，
- 稿件说明：
扫描看全文
马成成, 付茂海, 安琪, 等. 新型160 km/h铁路货运棚车车门疲劳寿命研究[J]. 机车电传动, 2023(4): 50-56.

MA Chengcheng, FU Maohai, AN Qi, et al. Fatigue life study of the door on the new-type 160 km/h railway box wagon[J]. Electric drive for locomotives,2023(4): 50-56.
马成成, 付茂海, 安琪, 等. 新型160 km/h铁路货运棚车车门疲劳寿命研究[J]. 机车电传动, 2023(4): 50-56. DOI： 10.13890/j.issn.1000-128X.2023.04.007.

MA Chengcheng, FU Maohai, AN Qi, et al. Fatigue life study of the door on the new-type 160 km/h railway box wagon[J]. Electric drive for locomotives,2023(4): 50-56. DOI： 10.13890/j.issn.1000-128X.2023.04.007.

摘要

在车辆运行过程中，由于轨道不平顺或随机风载的影响，车体会持续受到随机振动载荷的影响，严重时会对车体结构产生疲劳破坏。为保证运行安全，对某新型160 km/h大容积全侧开活动侧墙棚车车门进行随机振动疲劳分析。考虑到转向架、车体等零部件在激励传递过程中的影响，通过柔性建模方法建立车体动力学模型，选用美国6级线路谱进行仿真，提取出车门垂向振动加速度谱，分别运用基于应力响应功率谱密度函数的频域分析法和基于雨流计数法的时域分析法对车门疲劳损伤进行计算。结果表明，2种算法计算的车门疲劳寿命都满足600万km的运营需求，并且疲劳强度薄弱区域都显示为车门座焊接部位，其中频域分析法计算的疲劳损伤值为0.89，时域分析法计算的疲劳损伤值为0.51，前者更为保守，最后从数据处理方式、评估方法、算法原理3个方面分析了2种计算结果的差异原因。

Abstract

During train operation

influenced by track irregularity or random wind load

the vehicle body is continuously under the impact of random vibration loads

which will cause fatigue damage to the vehicle structure in severe cases. To ensure train operation safety

an analysis of random vibration fatigue of the door on a new 160 km/h large volume box wagon with movable side walls was carried out. Considering the influence of excitation transmission on bogie

car body and other parts

the vehicle body dynamics simulation model was established through a flexible modeling method

and the door's vertical vibration acceleration spectrum was obtained by using the American sixth grade track line. The door's fatigue damage was calculated with two analyzing methods

which were the frequency domain analysis based on the stress response power spectrum density function and the time domain analysis based on the rain flow counting method. The results show that the door's fatigue life under the two analyzing methods both meet the requirements for operating six million kilometers

and the areas with weak fatigue strength are welding parts on the door seat. The fatigue damage calculated by frequency domain analysis method is 0.89

and that calculated by time domain analysis method is 0.51. The former is more conservative. Finally

the reasons for the difference between the two results are analyzed from three angles

namely the data processing methods

evaluation methods and calculation principles.

关键词

160 km/h棚车疲劳寿命随机振动柔性建模时域分析频域分析仿真轨道不平顺

Keywords

160 km/h box wagonfatigue liferandom vibrationflexible modelingtime domain analysisfrequency domain analysissimulationtrack irregularity

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