摘要
为研究多通道刷丝–滑环接触副中刷丝支承刚度对系统动力学特性的影响,将刷丝简化为欧拉–伯努利悬臂梁,推导了刷丝支承刚度计算的理论公式。建立了滑环胶合细长轴的高速引电器转子系统有限元模型,考虑多通道刷丝支承刚度影响,开展了转子系统动模态数值仿真分析,得到了系统振型图、坎贝尔图及临界转速偏离裕度。研究结果表明,刷丝支承刚度对引电器转子细长轴结构一阶弯曲模态的影响不可忽略。
To study the influence of the brush support stiffness on the dynamic characteristics of the multichannel brush-slip ring contact pair, the brush is simplified as a Euler– Bernoulli cantilever beam, and the theoretical formula for calculating the brush support stiffness is derived. Moreover, a finite element model for the rotor system of the high-speed electrical feedthroughs with slip-ring glued slender shaft is established, and the support stiffness of the multi-channel brush is considered to study its effects on the rotor. This paper presents a numerical simulation analysis for the finite element model of the rotor system. Based on simulation,the system vibration mode diagram, Campbell diagram and critical speed deviation margin are obtained.Research results show that the brush support stiffness can be a significant factor in the first-order bending mode of the slender shaft structure of the rotor.
作者
张岩松
王旭华
张岩
宁阳
张广昊
ZHANG Yansong;WANG Xuhua;ZHANG Yan;NING Yang;ZHANG Guanghao(AECC Shenyang Engine Institute,Shenyang 110004,China;College of Sciences,Northeastern University,Shenyang 110004,China)
出处
《力学与实践》
北大核心
2022年第3期618-623,共6页
Mechanics in Engineering
关键词
欧拉–伯努利梁
细长轴
有限元分析
弯曲模态
临界转速
Euler–Bernoulli beam
slender shaft
finite element analysis
bending modal
critical speed
