北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (1): 18-25.doi: 10.13700/j.bh.1001-5965.2018.0222

• 论文 • 上一篇    下一篇

高速转子连接结构刚度损失及振动特性

洪杰1,2, 徐翕如1, 苏志敏3, 马艳红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
  • 收稿日期:2018-04-23 修回日期:2018-07-28 出版日期:2019-01-20 发布日期:2019-01-28
  • 通讯作者: 马艳红 E-mail:mayanh2002@163.com
  • 作者简介: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;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(51575022,11672017)

Joint stiffness loss and vibration characteristics of high-speed rotor

HONG Jie1,2, XU Xiru1, SU Zhimin3, MA Yanhong1,2   

  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 China Aviation Powerplant Research Institute, Zhuzhou 412002, China
  • Received:2018-04-23 Revised:2018-07-28 Online:2019-01-20 Published:2019-01-28
  • Supported by:
    National Natural Science Foundation of China (51575022,11672017)

摘要: 高负荷航空发动机转子的转速和支点跨度不断加大,使得转子弯曲刚度下降,并在工作中具有一定弯曲变形。转子弯曲变形时,连接界面会存在刚度损失,需考虑转子弯曲变形对连接界面刚度特性及转子系统振动特性的影响。提出了定量描述连接界面刚度损失的力学模型,并针对非连续转子系统的动力学设计,提出了基于应变能分布优化的连接结构刚度损失抑制方法。数值仿真结果表明:转子弯曲变形下,连接界面刚度损失显著,会使转子弯曲临界转速大幅降低;通过转子应变能分布优化设计可有效降低连接界面刚度损失对转子系统振动特性的影响,对转子系统振动特性优化设计具有重要的指导意义。

关键词: 连接界面, 刚度损失, 结构非连续性, 转子系统, 振动特性, 应变能

Abstract: To achieve high loading and light weight, the speed and the support span of aero-engine rotor continue to increase, which leads to the degradation of rotor bending stiffness and the bending deformation of the rotor. There will be bending stiffness loss at interfaces when the rotor has bending deformation. It is necessary to consider the effect of rotor bending deformation on joint interface stiffness characteristics and rotor system's vibration characteristics. A mechanical model for quantitatively describing the stiffness loss mechanism at the interface was proposed. For the dynamic design of discontinuous rotor system, the method for reduction of stiffness loss based on the strain energy distribution optimization was proposed. The numerical simulation results show that for large-span discontinuous rotor system, the stiffness loss is significant with bending deformation, which will greatly reduce the critical speed of the rotor. The sensitivity of rotor vibration characteristics to the stiffness loss can be controlled by optimizing the strain energy distribution of rotor. This method has important guiding significance for the optimal design of rotor vibration characteristics.

Key words: joint interface, stiffness loss, discontinuous structure, rotor system, vibration characteristics, strain energy

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发