摘要
随着高速动车组的持续发展,车辆振动问题日益突出,尤其是在高速运行过程中,车下设备受到来自车体的随机振动作用,容易产生疲劳损伤。研究中通过现场实测方法获取了不同车下设备在不同运行速度下振动环境数据,并提出了一种随机振动环境谱归纳方法,用于编制不同车下设备的振动环境归纳谱。对比分析了不同车下设备和不同车速下的振动环境差异,并基于频域疲劳分析方法,评估了车下设备疲劳损伤随速度变化的曲线。研究结果表明,高速动车组车下设备振动环境谱与IEC 61373标准规定的振动谱存在一定差异,特别是在高频段。由于吊挂位置的不同,不同车下设备的振动环境谱也表现出一定的差异性。随着运行速度的提升,车下设备疲劳损伤呈指数型增长,但总体疲劳损伤均小于1,表明当前设计具备一定的安全性裕度。
With the continuous development of high-speed EMUs(Electric Multiple Units),vehicle vibration issue has become increasingly prominent,especially during high-speed operation under train equipment is subjected to random vibrations from the car body,leading to potential fatigue damage.This study acquired vibration environment data of different under-car equipment at various operating speeds through field measurements and proposed a random vibration environment spectrum synthesis method to compile the vibration environment synthesis spectrum for different under-car equipment.The differences in vibration environments among different under-car equipment and at different speeds were comparatively analyzed.Furthermore,based on the frequency-domain fatigue analysis method,the curve of fatigue damage of under-car equipment with respect to speed changes was evaluated.The research results indicate that there are certain differences between the vibration environment spectrum of high-speed EMU under-car equipment and the vibration spectrum specified by the IEC 61373 standard,particularly in the high-frequency range.Due to different mounting positions,the vibration environment spectra of different under-car equipment also exhibit certain differences.As the operating speed increases,the fatigue damage of under-car equipment grows exponentially,but the overall fatigue damage remains less than 1,indicating that the current design has a certain safety margin.
作者
郭力荣
李国顺
陈璨
张义超
张红卫
GUO Lirong;LI Guoshun;CHEN Can;ZHANG Yichao;ZHANG Hongwei(Locomotive&Car Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《铁道机车车辆》
北大核心
2025年第3期26-32,共7页
Railway Locomotive & Car
基金
中国国家铁路集团有限公司科技研究开发计划重大课题(K2022J002)。
关键词
随机振动
振动环境谱
车下设备
频域疲劳分析
random vibration
vibration environment spectrum
under-vehicle equipment
frequency domain fatigue analysis
