摘要
以具有初始弯曲的非对称刚度单盘转子系统为研究对象,建立等变速情况下圆盘中心无量纲运动微分方程,运用数值分析方法对振幅及轴心轨迹进行仿真模拟,针对系统振幅、轴心轨迹对刚度比、重力参数、初弯值、初弯与质量偏心间夹角的响应规律进行了讨论研究。结果表明刚度非对称的情况下,重力参数是系统出现副临界现象的主要原因,对系统的轴心轨迹及静挠度有重大的影响;系统共振峰值会随着初弯值的增加而增大,随着初弯与质量偏心间夹角的增大而减小,这可以为系统故障诊断提供理论依据。
With the initial bending stiffness of a single asymmetric rotor system as the research object, such centers shifting circumstances disc dimensionless equations of motion had been established. The emulational simulation of amplitude and axis trajectory were performed with the numerical analysis method. The amplitude of the system, the axis trajectories on the stiffness ratio, gravitational parameter, initial bend value, initial bend angle between the eccentric and quality, external damping and the response from the angular acceleration of the law were discussed. The results show that in the case of asymmetric stiffness, gravitational parometer is the main reason for the phenomenon of the vice critical phenomenon and also has a significant impaetion the axis trajectory and static deflection; system resonance peak increases with the increase of initial bending value, with initial bending and quality heart decreases with the increasing of the angle, which can provide a theoretical basis for the fault diagnosis system.
出处
《机械设计与制造》
北大核心
2014年第5期170-172,175,共4页
Machinery Design & Manufacture
基金
国家自然科学基金(51075292)
关键词
初始弯曲
非对称刚度
瞬态响应
转子动力学
Initial Bending
Asymmetric Rigidity
Transient Response
Rotor Dynamics
