Abstract
We study degenerate nonlinear partial differential equations with dynamical boundary conditions describing the forced motions of nonuniform deformable bodies with heavy rigid attachments. We prove that the dynamical system generated by a discretization of these equations has an absorbing ball whose size is independent of the order of the discretization. This result implies the existence of an absorbing ball for the infinite-dimensional dynamical system corresponding to the original degenerate partial differential equation and thereby serves as a critical step for establishing the existence of global attractors for this system. Our results also address the interesting mechanical question of how nonuniformity complicates the longterm dynamics of the coupled systems we consider.
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Wilber, J.P. Absorbing Balls for Equations Modeling Nonuniform Deformable Bodies with Heavy Rigid Attachments. Journal of Dynamics and Differential Equations 14, 855–887 (2002). https://doi.org/10.1023/A:1020716727905
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DOI: https://doi.org/10.1023/A:1020716727905