



Avtorstvo: 
Frano DAMJANIĆ // 1.08 Objavljeno predavanje na znanstveni konferenci

Leto: 
1998 
Citat: 
DAMJANIĆ, Frano. On nonlinear 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. [114],
ilustr. 
Povzetek: 
Numerical analysis to the solution of nonlinear dynamics
of flexible thin shells is considered. The elastodynamic shell model is
developed from the threedimensional continuum by employing standard
assumptions of the firstorder sheardeformation theories. Motion of the
shelldirector is described by a singularityfree formulation based on the
rotation vector. Temporal discretisation is performed by an implicit
onestep second order accurate timeintegration scheme. Energy and momentum
conserving algorithm is applied. The algorithm, which is, in fact, a
modified standard midpoint rule, exactly preserves the fundamental
constants of the shell motion and it assures unconditional numerical
stability. Spatial discretisation is based on the fournode 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 NewtonRapshon based solution procedures. An
unconditionallystable time finite element formulation suitablefor the
longterm 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

