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A platform for research: civil engineering, architecture and urbanism
The effect of curvature in nonlinear supersonic flutter of panels with adjacent bays
https://orcid.org/0000-0002-3822-8428
Abstract Structural skins of aerospace vehicles are typically made of large, internally reinforced curved panels. The presence of stiffening components subdivides the panel into several bays that interact structurally. In this context, the present study investigates the effects of adjacent bays interaction in curved panels under supersonic flutter. The analyses reveal severe jumps in the post-flutter LCO amplitudes and sub-critical bifurcation with the coexistence of different LCO branches for a specific range of dynamic pressure. These discontinuities consist of abrupt changes in the LCO amplitudes, directly related to the nonlinear coupling between adjacent bays under supersonic flutter with strong sensitivity to initial conditions.
Highlights Influence of curvature in multibay panel flutter in supersonic regime is presented. Streamwise curvature increases the flutter dynamic pressure of multibay panels and induces sub-critical bifurcation. The supersonic flutter of streamwise curved adjacent panels is highly sensitive to initial conditions.
The effect of curvature in nonlinear supersonic flutter of panels with adjacent bays
https://orcid.org/0000-0002-3822-8428
Abstract Structural skins of aerospace vehicles are typically made of large, internally reinforced curved panels. The presence of stiffening components subdivides the panel into several bays that interact structurally. In this context, the present study investigates the effects of adjacent bays interaction in curved panels under supersonic flutter. The analyses reveal severe jumps in the post-flutter LCO amplitudes and sub-critical bifurcation with the coexistence of different LCO branches for a specific range of dynamic pressure. These discontinuities consist of abrupt changes in the LCO amplitudes, directly related to the nonlinear coupling between adjacent bays under supersonic flutter with strong sensitivity to initial conditions.
Highlights Influence of curvature in multibay panel flutter in supersonic regime is presented. Streamwise curvature increases the flutter dynamic pressure of multibay panels and induces sub-critical bifurcation. The supersonic flutter of streamwise curved adjacent panels is highly sensitive to initial conditions.
The effect of curvature in nonlinear supersonic flutter of panels with adjacent bays
https://orcid.org/0000-0002-3822-8428
Abstract Structural skins of aerospace vehicles are typically made of large, internally reinforced curved panels. The presence of stiffening components subdivides the panel into several bays that interact structurally. In this context, the present study investigates the effects of adjacent bays interaction in curved panels under supersonic flutter. The analyses reveal severe jumps in the post-flutter LCO amplitudes and sub-critical bifurcation with the coexistence of different LCO branches for a specific range of dynamic pressure. These discontinuities consist of abrupt changes in the LCO amplitudes, directly related to the nonlinear coupling between adjacent bays under supersonic flutter with strong sensitivity to initial conditions.
Highlights Influence of curvature in multibay panel flutter in supersonic regime is presented. Streamwise curvature increases the flutter dynamic pressure of multibay panels and induces sub-critical bifurcation. The supersonic flutter of streamwise curved adjacent panels is highly sensitive to initial conditions.
The effect of curvature in nonlinear supersonic flutter of panels with adjacent bays
Cabral, Myrella V. (author) / Marques, Flávio D. (author) / Ferreira, António J.M. (author)
Thin-Walled Structures ; 161
2020-12-06
Article (Journal)
Electronic Resource
English
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