## Statics and dynamics of thin shells. I: Case of non-inhibited flexion. (Statique et dynamique des coques minces. I: Cas de flexion pure non inhibée.)(French)Zbl 0697.73051

Summary: We consider thin shells in the context of the linearized theory of Koiter and the variational formulation of M. Bernadou and P. G. Ciarlet [Lect. Notes Econ. Math. Syst. 134, 89–136 (1976; Zbl 0356.73066)]. We consider the subspace $$G$$ of the displacements for which the Riemannian metrix of the mean surface remains invariant (pure flexions). We study the asymptotic behavior for thickness tending to zero in the case when $$G$$ does not reduce the null element (called of non-inhibited pure flexion). The asymptotic behavior is described by a variational problem in $$G$$, where only the flexion energy is involved. The membrane energy appears only indirectly by the Lagrange multiplier associated with the subspace $$G$$. We consider the static, dynamic and spectral problems (for small and medium frequencies).

### MSC:

 74K25 Shells 74H45 Vibrations in dynamical problems in solid mechanics 74S99 Numerical and other methods in solid mechanics 49R05 Variational methods for eigenvalues of operators 49J27 Existence theories for problems in abstract spaces

Zbl 0356.73066