摘要
针对地铁受电弓碳滑板的异常振动问题,结合碳滑板的结构特点,分别设计颗粒阻尼和约束阻尼两种减振方案,研究不同阻尼措施下碳滑板的振动抑制效果。首先通过模态实验确定原结构的振动形态,采用两种阻尼措施处理后,进一步对比分析垂向激励和横向激励条件下碳滑板的振动特点及阻尼减振效果。结果表明:两种阻尼措施均能有效抑制碳滑板的振动幅值,缩短振动衰减时间。总体上看,在垂向激励下表面敷设约束阻尼层比灌装颗粒阻尼的振动抑制效果更好,而在横向激励下表面敷设约束阻尼的减振效果变差,没有灌装颗粒阻尼的振动抑制作用强。研究结果可为碳滑板的阻尼减振方案设计提供重要参考。
The problem of abnormal vibration of subway pantograph carbon sliders was studied.Considering the structural characteristics of the pantograph carbon sliders,two damping schemes,particle damping and constrained damping,were prepared to study the vibration suppression effects of different damping measures on the carbon sliders.Firstly,vibration shape of the original structure was determined through the modal experiment.After treatment with the two damping measures,vibration characteristics and damping effect of the carbon slider under vertical excitation and lateral excitation were further analyzed and compared.The results show that the two damping measures can effectively suppress the vibration amplitude of the carbon slider and shorten the vibration attenuation time.On the whole,the constrained layer damping under the vertical excitation has a better vibration suppression effect than the filling particle damping,while the vibration absorption effect of the surface constrained layer damping under the lateral excitation is worse than that of the filling particle damping.The research results may provide an important reference for the vibration damping schemes design of the pantograph carbon sliders.
作者
王金朝
杨巧云
王志强
尹绪超
秦俊飞
段勇奇
WANG Jinzhao;YANG Qiaoyun;WANG Zhiqiang;YIN Xuchao;QIN Junfei;DUAN Yongqi(Luoyang Ship Material Research Institute,Luoyang Sunrui Rubber and Plastic Technology Co.,Ltd.,Luoyang 471000,Henan China)
出处
《噪声与振动控制》
CSCD
北大核心
2021年第3期163-168,共6页
Noise and Vibration Control
关键词
振动与波
碳滑板
颗粒阻尼
约束阻尼
减振效果
vibration and wave
carbon slider
particle damping
constrained damping
damping effect
