北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (3): 437-445.doi: 10.13700/j.bh.1001-5965.2018.0406

• 论文 • 上一篇    下一篇

动力涡轮转子结构系统力学特性稳健设计方法

洪杰1,2, 沈玉秡1, 王永锋1, 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 100083
  • 收稿日期:2018-07-03 出版日期:2019-03-20 发布日期:2019-04-04
  • 通讯作者: 马艳红,E-mail:mayanh2002@163.com 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、旋转机械振动控制、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(51575022,51475021)

Robust design method for mechanical characteristics of power turbine rotor structural system

HONG Jie1,2, SHEN Yupeng1, WANG Yongfeng1, 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 100083, China
  • Received:2018-07-03 Online:2019-03-20 Published:2019-04-04

摘要: 航空涡轴/涡桨发动机动力涡轮转子是典型多支点支承、具有连接界面、质量/刚度分布不均匀的高速柔性转子系统,其连接结构力学特性和支承刚度的分散性可导致转子系统动力特性恶化。针对典型动力涡轮转子结构系统,指出不可恢复滑移、疲劳、摩擦等连接界面接触损伤是连接结构力学特性产生分散性的内在原因,提出了接触状态系数、接触应力、不可恢复变形能和接触摩擦功等工程适用的定量评估参数。通过对多支点柔性转子-支承系统临界转速分布及其对各支点支承刚度敏感度的影响规律分析,提出了基于支承刚度低敏感区择优的动力特性稳健设计方法,所提方法提高了转子结构系统的稳健性。

关键词: 稳健设计, 连接界面, 接触损伤, 支承刚度, 转子系统

Abstract: The power turbine rotor of aero turbojet engine and turboprop engine is a typical high-speed flexible rotor structural system with multi-support, connecting interface and uneven mass/stiffness distribution. The dispersity of mechanical characteristics of joint structure and bearing stiffness can cause the dynamic cha-racteristics of the rotor structural system to deteriorate. According to the typical power turbine rotor structural system, it is pointed out that the interface contact damage, such as non-recoverable slip, fatigue and friction, is the intrinsic reason for the dispersity of the mechanical properties of the connecting structure, and the quantitative evaluation parameters including contact state coefficient, contact stress, non-recoverable deformation energy and contact friction work are put forward. Based on the analysis of the critical speed distribution of multi-support flexible rotor-bearing system and its influence on the stiffness sensitivity of each support, a robust design method of dynamic characteristics based on the selection of the low-sensitivity region of support stiffness is proposed, which improves the robustness of the rotor structure system.

Key words: robust design, connecting interface, contact damage, bearing stiffness, rotor system

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