转子轴承系统动力学特性及油膜参数识别方法研究

发布时间：2018-01-14 23:30

本文关键词：转子轴承系统动力学特性及油膜参数识别方法研究　出处：《华东理工大学》2011年硕士论文　论文类型：学位论文

【摘要】：旋转机械是工业部门中应用最为广泛的关键机组,一旦发生机械故障,会造成巨大的经济损失及人员伤亡。转子-轴承系统是旋转机械中的核心设备,其运行状态对整个机组的工作状况有很大影响,因此对转子-轴承系统动力学特性进行研究具有重要意义。本文主要研究转子-轴承系统的动力学特性以及轴承油膜参数的在线识别方法。建立双圆盘转子-轴承系统动力学有限元模型,采用短轴承理论假设推导了油膜力表达式。通过编制Fortran有限元程序研究系统在轴承油膜力作用下的动力学行为,以及油膜压力在轴承圆周方向和轴向方向的变化规律曲线。研究了利用轴颈位置的振动数据识别轴承油膜参数的识别算法,编制了Fortran识别程序,通过仿真算例对算法和程序进行了验证,证明了算法的正确性。在转子轴承试验台上进行试验,通过识别程序识别出试验台的轴承油膜参数,为在线故障识别及油膜参数识别提供理论支撑。
[Abstract]:Rotating machinery is the most widely used key unit in the industrial sector. Once mechanical failure occurs, it will cause huge economic losses and casualties. Rotor-bearing system is the core equipment in rotating machinery. Its running state has great influence on the working condition of the whole unit, so it is of great significance to study the dynamic characteristics of rotor-bearing system. In this paper, the dynamic characteristics of rotor-bearing system and the on-line identification method of oil film parameters are studied, and the dynamic finite element model of rotor-bearing system with double disks is established. The expression of oil film force is deduced by using short bearing theory. The dynamic behavior of the system under the action of oil film force is studied by compiling Fortran finite element program. And the variation curve of oil film pressure in the bearing circumference and axial direction. The recognition algorithm of oil film parameters by using the vibration data of journal position is studied, and the Fortran identification program is developed. The algorithm and program are verified by simulation examples, and the correctness of the algorithm is proved. The experiment is carried out on the rotor bearing test bed, and the oil film parameters of the test bed are identified by the identification program. It provides theoretical support for online fault identification and oil film parameter identification.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3;TH113

【参考文献】