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Avtorstvo: Frano DAMJANIĆ // 1.08 Objavljeno predavanje na znanstveni konferenci
Leto: 1998
Citat: DAMJANIĆ, Frano. On non-linear dynamic thin shell analysis. V: IDELSOHN, Sergio R. (ur.), ONATE, Eugenio (ur.), DVORKIN, Eduardo N. (ur.). Computational mechanics : new trends and applications. Barcelona: Centro Internacional de Métodos Numéricos en Ingeniería, 1998, str. [1-14], ilustr.
Povzetek: Numerical analysis to the solution of non-linear dynamics of flexible thin shells is considered. The elasto-dynamic shell model is developed from the three-dimensional continuum by employing standard assumptions of the first-order shear-deformation theories. Motion of the shell-director is described by a singularity-free formulation based on the rotation vector. Temporal discretisation is performed by an implicit one-step second order accurate time-integration scheme. Energy and momentum conserving algorithm is applied. The algorithm, which is, in fact, a modified standard mid-point rule, exactly preserves the fundamental constants of the shell motion and it assures unconditional numerical stability. Spatial discretisation is based on the four-node isoparametric elements. A particular attention is given to the consistent linearisation of the weak form of the initial boundary value problem discretised in time and in space, in order to achieve a quadratic rateof asymptotic convergence typical for the Newton-Rapshon based solution procedures. An unconditionally-stable time finite element formulation suitablefor the long-term dynamic computations of flexible shell structure, which may undergo large displacements, rotations and motions is here proposed.The selected numerical examples presented illustrate the applicability of the model
Tipologija: 1.08 Objavljeno predavanje na znanstveni konferenci
COBISS ID 566625 Polni zapis iz sistema COBISS
Vpisal 2001/08/08 19:56