航空发动机转子系统建模方法和振动特性分析

张力; 洪杰; 马艳红

航空发动机转子系统建模方法和振动特性分析

1.
中航工业沈阳发动机设计研究所, 沈阳 110015
2. 北京航空航天大学能源与动力工程学院, 北京

基金项目: 航空科学基金资助项目(2009ZB51019)

详细信息

中图分类号: TP391.9;V231.96
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- 被引次数: 0
出版历程
- 收稿日期: 2011-05-27
- 网络出版日期: 2013-02-28

Modeling method and vibration characteristics of aero-engine rotor system

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

摘要

摘要: 针对现代航空涡扇发动机转子系统的结构和力学特征,运用有限元法对其低压转子进行了有限元建模方法和动力特性研究.分别采用二维梁单元和三维实体单元建立转子系统的有限元模型,对其动力特性计算结果进行比较分析,在此基础上,提出了等效圆盘法进行有限元建模的等效原则.等效圆盘法将转子系统的叶片等效为刚性圆环,既能保留转子系统的结构和力学特征,又能有效地控制模型规模,将周期问题转化为轴对称问题,便于有限元程序的求解计算.计算结果表明,该方法是一种适用工程实际的有限元建模方法.
- 航空发动机 /
- 转子 /
- 有限元 /
- 动力特性
Abstract: According to the structural and mechanical properties of rotor system on the modern turbofan engine, an investigation about the finite element modeling technology and dynamic characteristics of low-pressure rotor was proposed, based on the finite element method (FEM). The finite element model of rotor system was developed by 2D beam element and 3D solid element separately and the dynamic characteristics were analyzed. Then a principle of finite element modeling, which is called equivalent-disk method, was presented. The equivalent-disk method regards the blades of rotor system as a rigid ring and changes the periodic model into axisymmetric model, which is favorable for FEM software in solving. It can not only keep the structural and mechanical properties of rotor system, but also control the scale of FEM model. The result indicates that this kind of equivalent method can improve the modeling techniques of rotor system on the turbofan engine and it is applicable in engineering.
- aero-engine /
- rotor system /
- finite element /
- dynamic characteristics

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参考文献(11)

[1]	Ruhl R L.Dynamics of distributed parameter rotor systems:transfer matrix and finite element techniques[D].New York:Cornell University,1970
[2]	Ruhl R L,Booker J F.A finite element model for distributed parameter turborotor systems[J].Journal of Engineering for Industry,1972,94:128-132
[3]	Thorkildsen T.Solution of a distributed mass and unbalanced rotor system using a consistent mass matrix approach[D].Arizona:Arizona State University,1974
[4]	Polk S R.Finite element formulation and solution of flexible rotor-rigid disc systems for natural frequencies and critical whirl speed[D].Arizona:Arizona State University,1974
[5]	Nelson H D,Mcvaugh J M.The dynamics of rotor bearing systems using finite elements[J].Journal of Engineering for Industry,1976,98:593-600
[6]	James T,Charles L,Jonathan L.Reduced-order modeling and wavelet analysis of turbofan engine structural response due to foreign object damage (FOD) events[J].Journal of Engineering for Gas Turbines and Power,2007,129(3):814–826
[7]	Nandi A,Neogy S.Modelling of rotors with three-dimensional solid finite elements[J].Journal of Strain Analysis for Engineering Design,2001,36(4):359–371
[8]	Lazarus A,Prabel B,Combescure D.A 3D finite element model for the vibration analysis of asymmetric rotating machines[J].Journal of Sound and Vibration,2010,329(18):3780-3797
[9]	Kumar S M.Rotor dynamic analysis using ANSYS[C]//Gupta K.IUTAM Symposium on Emerging Trends in Rotor Dynamics.New York:Springer Science Business Media,2011:153-162
[10]	陈萌,马艳红,刘书国,等.航空发动机整机有限元模型转子动力学分析[J].北京航空航天大学学报,2007,33(9):1014–1016Chen Meng,Ma Yanhong,Liu Shuguo,et al.Rotordynamic analysis of whole aero-engine models based on finite element method[J].Journal of Beijing University of Aeronautics and Astronautics,2007,33(9):1014–1016 (in Chinese)
[11]	王超,王延荣,徐星仲,等.应用三维有限元法计算汽轮机转子临界转速和模化长叶片[J].动力工程,2007, 27(6):840-844Wang Chao,Wang Yanrong,Xu Xingzhong,et al.Simulation of long blades and calculation of critical speeds of the steam turbine rotor by 3D finite element methods[J].Journal of Power Engineering,2007,27(6):840-844 (in Chinese)