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�������պ����ѧѧ�� 2006, Vol. 32 Issue (04) :373-376    DOI:
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�������պ����ѧ ���տ�ѧ�빤��ѧԺ, ���� 100083
Volterra series based transonic unsteady aerodynamics modeling
Wu Zhigang, Yang Chao*
School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� To implement aeroservoelastic analysis and synthesis in transonic flow, an approach for transonic unsteady aerodynamics modeling by applying Volterra series theory is presented. Based on the assumption of small perturbation, transonic unsteady aerodynamics can be expressed approximately as one-order Volterra series. Using the unsteady aerodynamics step responses due to the structural deformation calculated by CFD(computation fluid dynamics) technique, the Volterra kernels are determined, and the generalized unsteady AIC(aerodynamics influence coefficients) in frequency-domain are obtained. Then the aeroelastic state-space model is built by rational function approximation. To validate the transonic aerodynamics modeling, flutter analysis of a swept wing is executed by the Volterra series approach and is compared with other methods. The results show the aerodynamics model educed by the Volterra series approach can reflect the features of transonic aerodynamics. The Volterra series approach coincides with the CFD-CSD(computation fluid dynamics-computation structure dynamics) method in flutter analysis.
Keywords�� aeroelasticity   unsteady aerodynamics   transonic   flutter   Volterra series     
Received 2005-01-19;
Fund:

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About author: ��־��(1977-),��,����Ƽ����,��ʿ��, wuzhigang@buaa.edu.cn.
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��־��, �.����Volterra�����Ŀ����ٷǶ�����������ģ[J]  �������պ����ѧѧ��, 2006,V32(04): 373-376
Wu Zhigang, Yang Chao.Volterra series based transonic unsteady aerodynamics modeling[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(04): 373-376
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2006/V32/I04/373
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