主动磁悬浮转子过临界转速时的反向涡动研究

项目名称： 主动磁悬浮转子过临界转速时的反向涡动研究

项目编号： No.11302120

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 李红伟

作者单位： 山东大学

项目金额： 23万元

中文摘要： 主动磁力轴承具有无摩擦、转速高、能主动抑制转子振动等优点，具有广阔的应用前景。主动磁悬浮转子过临界转速技术是磁力轴承领域的前沿课题和研究热点。本申请项目重点针对主动磁悬浮转子过临界转速时反向涡动的机理和控制方法等基础性科学问题，开展理论探索与技术创新研究。研究机械加工装配误差及电磁参数差异等导致的磁力轴承支承特性的各向异性及其改善方法；基于转子的力学分析，建立支承特性各向异性的主动磁悬浮转子系统的动力学模型，采用理论仿真分析和实验相结合的方法，分别研究转子过刚性和挠性临界转速时的涡动特性；基于主动磁力轴承的磁场仿真研究，建立电磁力的动态特性，揭示主动磁悬浮转子过临界转速时反向涡动的激发力、作用方式及作用机理；研究主动磁悬浮转子过临界转速时反向涡动的控制方法以及改善措施。本项目的研究结果将丰富转子动力学的基础理论，进一步完善主动磁悬浮转子过临界转速技术，具有重要的理论意义和应用价值。

中文关键词： 转子动力学；反向涡动；电磁轴承；临界转速；各向异性支承

英文摘要： Active magnetic bearing has broad application prospects, with lots of advantages, such as friction-free, high rotation speed and damping rotor vibration, etc. The technology of active maglev rotor passing across critical rotation speeds is one cutting-edge topic and focus in the field of magnetic bearing. This project will focus on some basic science issues that the mechanism and control method of the backward whirl of active maglev rotor when passing across critical rotation speeds, and carry out the theory explorations and technological innovations. It will be studied that the bearing anisotropy characteristics of the active magnetic bearing (AMB), which caused by the mechanical structure errors and electromagnetic parameters differences. Then the improve method will be studied. The system dynamics model of the rotor levitated by AMBs with anisotropic bearing characteristics will be established based on the rotor mechanical analysis. Then the nutation characteristics of active maglev rotor when passing across the rigid and flexible critical rotation speeds will be studied by theory analysis, simulation and experiments. The dynamic characteristics model of the magnetic force on the rotor will be established through the magnetic field simulation of the active magnetic bearing to reveal the excitation force and m

英文关键词： rotor dynamics；backward whirling；active magnetic bearing；critical rotation speed；anisotropic suspension