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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.4 pt.A: Fluid-Structure Interaction >STALL INDUCED VIBRATION AND FLUTTER IN A SYMMETRIC AIRFOIL
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STALL INDUCED VIBRATION AND FLUTTER IN A SYMMETRIC AIRFOIL

机译：对称翼型中的失速感应振动和颤振

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In this paper the aemelastic stability of a wind turbine rotor in the dynamic stall regime is investigated. Two dimensional stall flutter models have been chosen for the aemelastic stability analysis. Two different aemelastic models have been considered. First, a pitching oscillation, and second, a flap-edgewise oscillation of an airfoil. Previous nonlinear aemelastic analysis on such systems are not exhaustive. Parameters like structural non-linearity and initial conditions have not been studied, while these have a significant influence on the overall dynamics. They have now been taken up in the present analysis. The overall study helps towards a better understanding of the stall flutter mechanism in such aemelastic systems. The study has found a strong influence of structural nonlinearity on the bifurcation pattern. Initial condition, too, plays an important role on the stability behavior as well as on the bifurcation pattern. Other system parameters of influence are nondimensional airspeed and external forcing. Interesting dynamical behavior like period-three and also super-harmonic and quasi-harmonic response have been found in the forced system, not reported before.
机译：本文研究了风力发电机转子在动态失速状态下的弹塑性稳定性。选择二维失速颤振模型进行弹性弹性稳定性分析。已经考虑了两种不同的弹性模型。首先是俯仰振荡，其次是机翼的襟翼向边缘振荡。先前关于此类系统的非线性弹性分析并不详尽。尚未研究诸如结构非线性和初始条件之类的参数，而这些参数对整体动力学具有重大影响。现在，在本分析中已经考虑了它们。总体研究有助于更好地了解此类弹性模量系统中的失速颤动机理。研究发现结构非线性对分叉模式有很大影响。初始条件也对稳定性和分叉模式起着重要作用。影响的其他系统参数是无量纲空速和外力。在强迫系统中发现了有趣的动力学行为，如第三周期，以及超谐波和准谐波响应，以前没有报道过。

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