基于CFD/CSD耦合的颤振与动载荷分析方法

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (3) : 106-110.

论文

基于CFD/CSD耦合的颤振与动载荷分析方法

谢亮1,2，徐敏2，李杰1，蔡天星2

作者信息 +

Flutter and dynamic analysis based CFD/CSD coupling method

Xie Liang1,2,Xu Min 2,Li Jie 1,Cai Tian-xing 2

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文章历史 +

摘要

采用CFD/CSD耦合方法，建立了气动弹性仿真系统。基于系统辨识的方法，使用Volterra级数建立了降阶模型(ROM)，实现了颤振边界的快速求解，分别使用CFD/CSD全耦合方法与ROM完成了AGARD 445.6标模的颤振分析，计算结果与实验相符较好。使用ROM完成了带边条平直翼的颤振分析。使用CFD/CSD耦合方法计算了此机翼在飞行动压下的气弹响应，结果表明即使在颤振边界内，仍然有可能出现极限环振荡（LCO）。对此，分析了其气弹响应中的动载情况。结果表明基于CFD/CSD耦合的方法可以真实地仿真气弹响应过程，准确地分析气弹响应中的动态载荷情况。

Abstract

CFD/CSD coupling algorithm research was conducted, and CFD based nonlinear aeroelastic simulation code was developed for complex aeroelastic system analysis. In order to meet the demand of rapid analysis, a reduced-order model based on Volterra series for nonlinear unsteady aerodynamics is developed. This model is validated on AGARD 445.6 wing which is a standard aeroelastic configuration, and used to the Flutter analysis of a plate wing with regula. CFD/CSD coupling is employed to calculate the aeroelastic response under the flight dynamic pressure, the result shows that even when the flight dynamic is below the flutter boundary, the aeroelastic response also has the possibility to go into Limit Cycle Oscillations(LCO).Then the dynamic load is analyzed in this case. The result shows that CFD/CSD Coupling Method can credibly simulate the aeroelastic response, and it can give accurate information about dynamic load in such response.

导出引用

谢亮;徐敏;李杰;蔡天星. 基于CFD/CSD耦合的颤振与动载荷分析方法[J]. 振动与冲击, 2012, 31(3): 106-110

Xie Liang;Xu Min;Li Jie;Cai Tian-xing . Flutter and dynamic analysis based CFD/CSD coupling method[J]. Journal of Vibration and Shock, 2012, 31(3): 106-110