北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (2): 227-233.doi: 10.13700/j.bh.1001-5965.2018.0309

• 论文 • 上一篇    下一篇

具有初始热变形的转子系统振动响应分析

马艳红1,2, 刘海舟1, 邓旺群3,4, 杨海3,4, 洪杰1,2   

  1. 1. 北京航空航天大学 能源与动力工程学院, 北京 100083;
    2. 先进航空发动机协同创新中心, 北京 10008;
    3. 中国航发湖南航空动力机械研究所, 株洲 412002;
    4. 航空发动机振动技术航空科技重点实验室, 株洲 412002
  • 收稿日期:2018-05-28 出版日期:2019-02-20 发布日期:2019-03-04
  • 通讯作者: 洪杰 E-mail:hongjie@buaa.edu.cn
  • 作者简介:马艳红女,博士,教授,博士生导师。主要研究方向:航空发动机整机动力学、旋转机械振动控制、智能结构与新型阻尼材料等;洪杰男,博士,教授,博士生导师。主要研究方向:航空发动机转子动力学、航空发动机整机动力学、智能结构与新型阻尼材料等。
  • 基金资助:
    国家自然科学基金(51575022);中央高校基本科研业务费专项资金

Vibration response analysis of rotor system with initial thermal deformation

MA Yanhong1,2, LIU Haizhou1, DENG Wangqun3,4, YANG Hai3,4, HONG Jie1,2   

  1. 1. School of Energy and Power Engineering, Beihang University, Beijing 100083, China;
    2. Collaborative Innovation Center of Advanced Aero-engine, Beijing 10008;
    3. AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China;
    4. Aviation Key Laboratory of Aero-engine Vibration Technology, Zhuzhou 412002, China
  • Received:2018-05-28 Online:2019-02-20 Published:2019-03-04
  • Supported by:
    National Natural Science Foundation of China (51575022); the Fundamental Research Funds for the Central Universities

摘要: 航空发动机热起动时的温度分布不均会使转子产生初始热变形,进而引起发动机振动过大,甚至导致起动失败。针对此问题,以航空发动机中的典型转子为对象,根据初始热变形对转子振动的影响建立相应的动力学方程,并通过模态坐标变换分析初始热变形对转子系统振动响应的影响。结果表明,初始热变形相当于对转子作用了附加激励,包括转轴初始弯曲激励、附加不平衡激励和附加陀螺力矩激励,上述激励均与转速同步。其中,附加不平衡激励和附加陀螺力矩激励大小与转速有关,对转子通过各阶临界转速的振动响应均有较大影响;转轴初始弯曲激励大小与转速无关,主要影响低阶临界转速的振动响应。

关键词: 转子系统, 热变形, 初始弯曲, 陀螺力矩, 不平衡量

Abstract: Uneven temperature distribution of an aero-engine during hot restart can lead to initial thermal deformation of its rotors, which causes excessive engine vibration, or even a start-up failure. In view of the problem, this paper takes a typical rotor in aero-engines as an object, establishes its dynamic equation based on the effects of thermal deformation on vibration, and analyzes the effects of thermal deformation on vibration response of rotor system through modal coordinate transformation. The results show that thermal deformation is equivalent to additional excitations acting on the rotor, that is, initial shaft bow excitation, additional unbalance excitation and additional gyroscopic moment excitation, all of which are synchronous with the rotating speed. Moreover, the amplitude of unbalance and gyroscopic moment excitation is related to the rotating speed, therefore influencing rotor vibration response at different critical speeds to an equivalent extent, while that of initial shaft bow excitation is not related to the rotating speed and the response of low-order critical rotating speeds is more affected.

Key words: rotor system, thermal deformation, initial bow, gyroscopic moment, unbalance

中图分类号: 


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