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Zbl 1176.35036
Ma, Qiaozhen; Zhong, Chengkui
Existence of strong solutions and global attractors for the coupled suspension bridge equations.
(English)
[J] J. Differ. Equations 246, No. 10, 3755-3775 (2009). ISSN 0022-0396

The authors consider the vibrating beam equation coupled with a vibrating string equation: \align u_{tt}+ \alpha u_{xxxx}+\delta_1 u_t+ k(u- v)^++ f_B(u)= h_B\quad &\text{in }[0,L]\times \bbfR^+,\\ v_{tt}- \beta v_{xx}+ \delta_2 v_t- k(u- v)^++ f_S(v)= h_S\quad &\text{in }[0,L]\times \bbfR^+\endalign with the simply supported boundary conditions at both ends and initial value conditions. For proper $k$ the existence of the strong solution is obtained by the Faedo-Galerkin method. A priori estimates are considered. The authors prove that the solution semigroup defined on the associated product space has a global attractor.
[Miklavž Mastinšek (Maribor)]
MSC 2000:
*35B41 Attractors
35M31
35Q70
47D06 One-parameter semigroups and linear evolution equations

Keywords: coupled suspension bridge equations; norm-to-weak continuous semigroup; strong solutions; global attractors

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