航空发动机转子系统动力特性的非概率分析

王军; 洪杰; 陈萌; 马艳红

航空发动机转子系统动力特性的非概率分析

王军^1,2,
洪杰¹,
陈萌¹,
马艳红¹

1.
北京航空航天大学能源与动力工程学院,北京 100191
2.
中国航空工业集团公司沈阳发动机设计研究所,沈阳 110015

基金项目: 航空科学基金(2009ZB51019)

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出版历程
- 收稿日期: 2011-03-14
- 修回日期: 2011-06-22
- 刊出日期: 2012-01-28

Non-probabilistic analysis on aero-engine rotordynamics

1.
School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2.
Shenyang Aeroengine Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China

摘要

摘要: 运用一种非概率-区间方法来对转子动力特性进行分析.基于区间数学和摄动理论的区间分析方法将不确定参数支承刚度和连接结构刚度视为区间向量,运用区间摄动法建立了转子系统固有频率的公式,分别应用区间摄动法和组合法对数值算例进行分析,并比较结果,验证了方法的有效性.结果表明:与确定性方法相比,运用区间摄动法能够较准确地进行转子动力特性分析,降低了传统的概率分析方法对不确定参数信息的过多要求,不需要确定参数的概率分布.
- 航空发动机 /
- 转子动力特性 /
- 不确定性 /
- 非概率 /
- 区间分析方法
Abstract: A non-probabilistic-interval analysis method,which solves the rotordynamics with these uncertain parameters,was presented.Based on interval mathematics and perturbation method,interval analysis method simplified the uncertain parameters such as support stiffness and connecting structure stiffness to interval vectors,so that it could get the intervals within which the rotordynamics varied when less information of structure was known.The formulation of natural frequencies of rotor using interval perturbation analysis method was formulated.A numerical example of comparison between interval perturbation method analysis and monotonic method was given.The rotordynamic analysis of a turbofan rotor was performed with this method.The present interval perturbation method is more accurate than determined method in rotordynamic analysis,and it decreases the requirement of uncertain parameters,such as distribution characteristic.
- aero-engine /
- rotordynamics /
- uncertainty /
- non-probabilistic /
- interval analysis method

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参考文献(13)

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