On the aerodynamic forces involved in aeroelastic instability of two-dimensional panels in uniform incompressible flow

The Nonlinear Hydroelastic Behaviour of Flexible Walls

“…Investigations have been conducted in order to identify the cause of this behaviour. These include the substitution of 'built-in' leading and trailing edges for the hinged conditions known, in theoretical work [for example Garrad & Carpenter (1982a)], to produce weak logarithmic singularities; we have also used a computational model which properly accounts for the rigid surround. Neither of these modifications significantly change the results of Figure 10(c).…”

Aeroelastic analysis of panels in compressible flows

“…with l ¼ 181 for a clamped panel and l ¼ 41.8 for a simply supported panel (Garrad and Carpenter, 1982). In this way, a clamped steel panel of 1 m length has a critical thickness of about 1.54 mm at Mach number 0.3; almost incompressible flow.…”

“…A panel is chosen because experiments suggest that when it is clamped or simply supported at its ends it behaves essentially as a dynamical airfoil (Garrad and Carpenter, 1982). The grid contains 60Â24 cells; 20 divisions over the curved surface.…”

“…It can be stable or unstable, depending on the incident flow velocity. If it is simply supported or clamped at both ends; it can lose stability by divergence at subsonic flows or flutter at supersonic flows (Garrad and Carpenter, 1982). However, a panel with a clamped end and free elsewhere loses stability by flutter at subsonic flows and by divergence at supersonic flows.…”

The excitation of waves on a flexible panel in a uniform flow

“…So too is energy scattering possible. For a flexible panel, even when disturbances are small enough for a linear representation of the wall mechanics to give an accurate approximation, weak nonlinearities due the imposi-tion of fixed flexible-panel edges have been shown to exist by Garrad & Carpenter (1982a) and Lucey & Carpenter (1993a). The effects of these nonlinearities are largely confined to regions of the flexible panel close to its leading and trailing edges.…”