气动载荷下高速列车设备舱裙板非稳态振动疲劳强度研究

程亚军1,2,杨明智1,刘乐天3,于春洋2,李凡松3

振动与冲击 ›› 2024, Vol. 43 ›› Issue (9) : 36-42.

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (9) : 36-42.
论文

气动载荷下高速列车设备舱裙板非稳态振动疲劳强度研究

  • 程亚军1,2,杨明智1,刘乐天3,于春洋2,李凡松3
作者信息 +

Non-stationary state vibration fatigue strength of high-speed train equipment compartment apron board under aerodynamic load

  • CHENG Yajun1,2, YANG Mingzhi1, LIU Letian3, YU Chunyang2, LI Fansong3
Author information +
文章历史 +

摘要

高速列车设备舱裙板对改善列车空气动力学性能起到重要作用,裙板除受到振动载荷外,还承受气动载荷。随着运行速度的不断提高,裙板承受的气动载荷愈发强烈,为保证高速列车的正常运行,对裙板的疲劳评估尤为重要。本文针对裙板在气动载荷作用下的非稳态振动特性,以实测气动载荷作为输入利用有限元仿真获取脉冲响应函数(IRF),采用时域卷积积分方法计算加速度测点位置加速度,对比试验数据进行模型验证,对比结果显示总体误差小于10%。再采用该方法计算关注单元动应力,通过振动疲劳强度分析方法进行评估,评估结果显示裙板疲劳强度可以满足速度为400 km/h列车的需求。

Abstract

The skirt board of the high-speed train equipment cabin plays an important role in improving the aerodynamic performance of the train. In addition to being subjected to vibration loads, the skirt board also bears a large aerodynamic load. As the operating speed continues to increase, the aerodynamic load borne by the skirt board becomes stronger and stronger. To ensure the normal operation of high-speed trains, fatigue assessment of the skirt board is particularly important. This article focuses on the non-steady-state vibration characteristics of the skirt board under the action of aerodynamic loads, using measured aerodynamic loads as input to obtain impulse response function (IRF) using finite element simulation, and using time-domain convolution integral method to calculate the acceleration at the acceleration measurement point. The model is verified by comparing with experimental data, and the comparison results show that the overall error is less than 10%. Then this method is used to calculate the dynamic stress of the concerned unit, and it is evaluated through the vibration fatigue strength analysis method. The evaluation results show that the fatigue strength of the skirt can meet the requirements of trains with speed of 400 km/h.

关键词

振动疲劳强度 / 非稳态 / 裙板 / 气动载荷

Key words

vibration fatigue strength / non-stationary / apron board / aerodynamic load

引用本文

导出引用
程亚军1,2,杨明智1,刘乐天3,于春洋2,李凡松3. 气动载荷下高速列车设备舱裙板非稳态振动疲劳强度研究[J]. 振动与冲击, 2024, 43(9): 36-42
CHENG Yajun1,2, YANG Mingzhi1, LIU Letian3, YU Chunyang2, LI Fansong3. Non-stationary state vibration fatigue strength of high-speed train equipment compartment apron board under aerodynamic load[J]. Journal of Vibration and Shock, 2024, 43(9): 36-42

参考文献

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