Attractors for non-dissipative irrotational von Karman plates with boundary damping |
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Authors: | Lorena BociuDaniel Toundykov |
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Institution: | a Department of Mathematics, North Carolina State University, Raleigh, NC, USA b Department of Mathematics, University of Nebraska—Lincoln, Lincoln, NE, USA |
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Abstract: | Long-time behavior of solutions to a von Karman plate equation is considered. The system has an unrestricted first-order perturbation and a nonlinear damping acting through free boundary conditions only.This model differs from those previously considered (e.g. in the extensive treatise (Chueshov and Lasiecka, 2010 11])) because the semi-flow may be of a non-gradient type: the unique continuation property is not known to hold, and there is no strict Lyapunov function on the natural finite-energy space. Consequently, global bounds on the energy, let alone the existence of an absorbing ball, cannot be a priori inferred. Moreover, the free boundary conditions are not recognized by weak solutions and some helpful estimates available for clamped, hinged or simply-supported plates cannot be invoked.It is shown that this non-monotone flow can converge to a global compact attractor with the help of viscous boundary damping and appropriately structured restoring forces acting only on the boundary or its collar. |
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Keywords: | primary 74K20 35B41 secondary 93D15 |
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