摘要
主要针对一个双盘单跨转子系统,采用分段线性弹簧/阻尼模型来模拟基座松动故障,并将其与转子系统有限元模型进行耦联,根据API617标准采用2种不同的载荷加载工况,利用三维谱图和轴心轨迹图,分析未松动螺栓刚度、松动间隙和转速对系统动力学特性的影响。结果表明在2种不同加载形式下,系统运动存在不同的分岔形式,出现了多种周期及拟周期运动形式,且在第2种加载形式下系统运动更为复杂。得出的结论为转子–轴承系统故障诊断、动态设计和安全运行提供了理论参考。
By taking a single-span rotor system with two discs as the research object, the pedestal looseness fault was simulated using a piecewise linear spring/damping model and then this model was combined with the finite element （FE） model of the rotor system. Two different load conditions were determined based on API Standard 617 and the spectrum cascade and rotor orbit were used to analyze the influence of dynamic characteristics on shaft system by the stiffness of non-loose bolts, looseness clearance and rotating speed. The results show that different bifurcation forms, multiple periodic and quasi-periodic motions can be observed under two load cases, and the system motion is more complicated under the second load case. The results will provide theoretical references for fault diagnosis, dynamic design, and safe operation of rotor-bearing system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第26期132-137,158,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50805019)
中央高校基本科研业务费专项项目(N100403008)
教育部新世纪人才支持计划(NCET-11-0078)~~
关键词
基座松动
转子系统
动力学特性
有限元
pedestal looseness
rotor system
dynamic characteristic
finite element
