北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (8): 1677-1683.doi: 10.13700/j.bh.1001-5965.2016.0635

• 论文 • 上一篇    下一篇

高速柔性转子支承松动力学特征及动力特性

于欢1, 马艳红1,2, 肖森1, 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 100083
  • 收稿日期:2016-08-01 修回日期:2016-11-04 出版日期:2017-08-20 发布日期:2017-01-13
  • 通讯作者: 马艳红 E-mail:mayanh2002@163.com
  • 作者简介:于欢,女,硕士研究生。主要研究方向:航空发动机转子动力学;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。
  • 基金资助:
    国家自然科学基金(51575022,51475021);航空科学基金(20142151024)

Mechanical and dynamic characteristics of bearing with looseness on high-speed flexible rotor

YU Huan1, MA Yanhong1,2, XIAO Sen1, HONG Jie1,2   

  1. 1. School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. Collaborative Innovation Center of Advanced Aero-Engine, Beijing 100083, China
  • Received:2016-08-01 Revised:2016-11-04 Online:2017-08-20 Published:2017-01-13
  • Supported by:
    National Natural Science Foundation of China (51575022,51475021);Aeronautical Science Foundation of China (20142151024)

摘要: 针对高速柔性转子支承松动的结构特征、力学特征以及多支点转子系统动力学设计的需要,研究了转子支承结构松动引起支承刚度非连续变化的产生机理,建立了支承松动转子系统动力学模型,分析了支承松动转子系统存在混沌运动的条件,即当转子动力特性对支承刚度变化敏感时,受支承刚度阶跃影响,支承松动转子系统会产生混沌运动。根据多支点转子系统动力学特性与支承结构位置、刚度的相关性,采用优化支承位置和支承刚度的方法,使转子动力特性对支承刚度非连续变化不敏感,为多支点高速柔性转子系统的动力学优化设计提供了设计途径。

关键词: 柔性转子, 支承松动, 力学特征, 动力特性, 优化设计

Abstract: Based on analysis of the structural and mechanical characteristics of the bearing with looseness on high-speed flexible rotor and the demand of dynamic optimal design for multi-supported flexible rotor, the mechanism of non-straight change of stiffness of supporting structure caused by looseness on rotor-bearing system was researched. Then a dynamic model of rotor-bearing system with looseness was developed. The generation conditions of chaos were analyzed. According to the analysis, the rotor will produce chaotic motion by the impact of the step change in stiffness when the dynamics of the rotor is sensitive to the stiffness of supporting structure. Based on the relationship of dynamics of the rotor and position and stiffness of supporting structure, the optimization design of the position and stiffness of supporting structure can control the sensitivity of rotor dynamic characteristics to the stiffness of the support, which can provide design method for dynamics optimization design for multi-supported high-speed flexible rotor.

Key words: flexible rotor, bearing with looseness, mechanical characteristics, dynamic characteristics, optimization design

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