Finite element analysis of dynamic stability of bearingless rotor

WEI Li-jun; LI Shu; LI Xue-chang

Finite element analysis of dynamic stability of bearingless rotor

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

基金项目:

National Hi-tech Research and Development Program of China(2012AA112201)

The Fundamental Research Funds for the Central Universities

National Natural Science Foundation of China(10772013)

Aeronautical Science Foundation of China(20100251007)

详细信息

作者简介:
WEI Li-jun，E-mail：weilijun0318@126.com

中图分类号: V212.5
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出版历程
- 收稿日期: 2013-03-12
- 刊出日期: 2014-05-28

Finite element analysis of dynamic stability of bearingless rotor

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

Funds:

National Hi-tech Research and Development Program of China(2012AA112201)

The Fundamental Research Funds for the Central Universities

National Natural Science Foundation of China(10772013)

Aeronautical Science Foundation of China(20100251007)

摘要

摘要: Dynamic stability equations of bearingless rotor blades were investigated using a simplified model.The aerodynamic loads of blades were evaluated using two-dimensional airfoil theory.Perturbation equations were obtained by linearization of the perturbation.A normal-mode approach was used to transform the equations expressed by nodal degrees of freedom into equations expressed by modal degrees of freedom,which can reduce the dimension of the equations.The stability results of rotor blades were presented using eigenvalue analysis.The shape function matrix was obtained using spline interpolation,which simplified the analysis and made assembly of the inertial matrix,damping matrix,and stiffness matrix a simple mathematical summation.The results indicate that the method is efficient and greatly simplifies the analysis.
- bearingless rotor /
- dynamic stability /
- finite element method /
- spline interpolation /
- eigenvalue analysis
Abstract: Dynamic stability equations of bearingless rotor blades were investigated using a simplified model.The aerodynamic loads of blades were evaluated using two-dimensional airfoil theory.Perturbation equations were obtained by linearization of the perturbation.A normal-mode approach was used to transform the equations expressed by nodal degrees of freedom into equations expressed by modal degrees of freedom,which can reduce the dimension of the equations.The stability results of rotor blades were presented using eigenvalue analysis.The shape function matrix was obtained using spline interpolation,which simplified the analysis and made assembly of the inertial matrix,damping matrix,and stiffness matrix a simple mathematical summation.The results indicate that the method is efficient and greatly simplifies the analysis.
- bearingless rotor /
- dynamic stability /
- finite element method /
- spline interpolation /
- eigenvalue analysis

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参考文献(18)

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