基于Broyden法的旋翼多体系统气动弹性分析

Abstract

Abstract:

An aeroelasticity model of a rotor system and its simulation method are developed. Based on the dynamics of flexible multibody systems, an aeroelastic model of a rotor is deduced. The driving constraint method is adopted to simplify the constraint equations and realize the reduction of system equations. A large deflection blade model, including all the nonlinear terms of the deformation, is incorporated, which is suitable for the aeroelastic analysis of the rotor. According to the nonlinear implicit expression and high stiffness ratio of the system equations, an implicit integration algorithm combined with the Broyden method is developed, which exhibits excellent numerical stability and good computational efficiency without calculating the Jacobi matrices and their inverse matrices. To verify the correctness of the developed method, the transient analysis of a model blade and the aeroelastic analysis of a model rotor are implemented. The influence of the stability analysis methods, blade structure models and inflow models on computation is also studied. It demonstrates that the developed method is useful for improving the computation precision of aeroelastic stability.

Key words: rotor, aeroelasticity, Broyden method, dynamics of a multibody system, stability

CLC Number:

V211.47

YU Zhihao, YANG Weidong, ZHANG Chenglin. Aeroelasticity Analysis of Rotor Multibody System Based on Broyden Method[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(12): 2171-2182.

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Aeroelasticity Analysis of Rotor Multibody System Based on Broyden Method

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