具有结构阻尼的复合材料薄壁梁的动力失速非线性颤振特性

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (18) : 146-152.

论文

具有结构阻尼的复合材料薄壁梁的动力失速非线性颤振特性

任勇生, 刘廷瑞

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Stall nonlinear flutter behavior of the thin-walled composite beam with structural damping

REN Yong-sheng，LIU Ting-rui

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摘要

研究具有结构阻尼的复合材料薄壁梁动力失速非线性颤振特性。采用受ONERA非线性气动力作用的复合材料薄壁梁的气弹模型分析非线性气弹稳定性；采用复合材料薄壁梁的模态阻尼分析模型进行结构阻尼预测，复合材料结构阻尼对复合材料薄壁梁气弹系统稳定性影响通过引入比例阻尼矩阵的方式予以考虑。采用Galerkin法对具有结构阻尼的气弹方程进行离散化，同时利用片条理论对非线性广义气动力进行计算。借助特征值方法及时域积分法分析复合材料薄壁梁非线性颤振边界及气弹响应的稳定性。通过数值分析，揭示复合材料结构阻尼、纤维铺层角对复合材料薄壁梁非线性颤振边界影响。结果表明，结构阻尼用于抑制复合材料薄壁梁的动力失速非线性颤振，增强气弹稳定性，具有十分明显作用效果。

Abstract

The effect of structural damping on the aeroelastic stability has been investigated for composite thin-walled beam. The aeroelastic model of the composite thin-walled beam combined with the ONERA.aerodynamic dynamic stall model is presented to study aeroelastic stability. The structural damping of the beam is predicted based on the analytical formulas of the modal damping of thin-walled composite beam. The effect of structural damping on aeroelastic stability is taken into account by using proportional damping matrix. By means of Galerkin' s method, the nonlinear aeroelastic equations considering the structural damping are reduced to ordinary equations. The general aerodynamic forces are obtained from strip theory. The stability characteristics are investigated through eigenvalue analysis and time domain integration.The effects of the structural damping of composite material and fiber orientation on the nonlinear flutter characteristics of composite thin-walled beam are obtained by numerical calculation. The results show that, using the structural damping of the thin-walled composite beam described in this paper, a significant enhancement in the aeroelastic stability of the blade can be achieved.

导出引用

任勇生;刘廷瑞. 具有结构阻尼的复合材料薄壁梁的动力失速非线性颤振特性 [J]. 振动与冲击, 2013, 32(18): 146-152

REN Yong-sheng;LIU Ting-rui. Stall nonlinear flutter behavior of the thin-walled composite beam with structural damping[J]. Journal of Vibration and Shock, 2013, 32(18): 146-152