等方性および直交異方性く形平板のパネル・フラッタ限界値に対する気流方向と面内力の影響

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タイトル別名
  • Effects of Airflow Direction and Midplane Stresses on the Critecal Flutter Parameter of Flat Rectangular Isotropic and Orthotropic Panels
  • トウホウセイ オヨビ チョッコウ イホウセイ クケイ ヘイバン ノ パネル フ

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説明

A theoretical analysis is presented on the supersonic flutter characteristics of flat isotropic and orthotropic rectangular panels having clamped edges. Modified piston theory is employed for the aerodynamic forces and GALERKIN's method is used. The panel are subjected to midplane normal and shear stresses, and the principal direction of orthotropy and the derection of airflow are assumed to be independent of the panel edges. Stability boundaries are computed and expressed as curves in flutter parameter versus midplane stress plane for both isotropic and orthotropic panels. These results show that the shear stress raise the flutter boundary for certain direction of airflow for both isotropic and orthotropic panels. All calculations are based on a panellength-width ratio of 1.5 and the four modes approximation.

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