Abstract
Supersonic flutter of rectangualar flat panels stiffened by flexible discrete stiffeners perpendicular to the flow direction is analytically studied without modal approximation. Numerical computation has been carried out on a panel of lengthto-width ratio 2 with a single stiffener at the mid-chord line. It is clarified that the stiffener has a destabilizing effect on panel flutter with its certain bending and torsional stiffeness. Aerodynamic and structural dampings play an important role on specifying the bending stiffeness required to prevent flutter.
