Transonic Aeroelastic Instability Searches Using Sampling and Aerodynamic Model Hierarchy
Transonic Aeroelastic Instability Searches Using Sampling and Aerodynamic Model Hierarchy
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DOI：
10.2514/1.j050509
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发表时间：
2011-06
期刊：
影响因子：
2.5
通讯作者：
S. Timme;K. Badcock
中科院分区：
文献类型：
--
作者：
S. Timme;K. Badcock
DOI: 10.2514/1.J050509 A hierarchy of flow models is exploited for transonic aeroelastic stability analysis using the kriging interpolation technique applied within the Schur complement eigenvalue framework. In the Schur framework, a modified structural eigenvalue problem describes the coupled aeroelastic system with a precomputed interaction term depending on the response frequency. The interaction term, representing the influence of the high-dimensional computational fluid dynamics system, is approximated by reconstruction based on samples that can be computed using a frequency or time domain solver. The computationally cheap approximation model is developed and discussed in this paper for two-degree-of-freedom aerofoil cases. The approximation model is used for both the parametric blind search of aeroelastic instability and for updating predictions based on aerodynamic models of different fidelities.
