Masato Tamayama, Shusuke Yoshida, Tomohiro Yokozeki

DOI Number: N/A

Conference number: IFASD-2019-047

An efficient method to calculate generalized aerodynamic forces is studied. Two kinds of structures are considered in this method: one is the original structure (Str-A), and another structure (Str-B) is the one partly having different structural characteristics from the Str-A. The concept of this method is to construct the generalized aerodynamic forces for the Str-B with the Str-A’s modal information and generalized aerodynamic forces. With this method, unsteady aerodynamic calculation is conducted only for the Str-A. This method was applied to two models: a rectangular plate wing and the AGARD 445.6 wing. For both models, the expression of Str-B mode vectors improves as the FEM mesh size. The accuracy of Str-B’s generalized aerodynamic forces seems far from satisfactory to introducing them to flutter analyses, and further treatment for reconstructing the Str-B mode vectors by considering artificial modal vectors should be conducted in our future study.

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In Categories: IFASD 2019, Unsteady Aerodynamics
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