20.500.12556/RUL-68445 On non-linear dynamics of shells implementation of energy-momentum conserving algorithm for a finite rotation shell model Continuum and numerical formulations for non-linear dynamics of thin shells are presented in this work. An elastodynamic shell model is developed from the three-dimensional continuum by employing standard assumptions of the first-order shear-deformation theories. Motion of the shell-directior is described by a singularity-free formulation based on the rotation vector. Temporal discretization is performed by an implicit, one-step, second-order accurate, time-integration scheme. In this work, an energy and momentum conserving algorithm, which exactly preserves the fundamental constants of the shell motion and guaranties unconditional algorithmic stability, is used. It may be regarded as a modification of the standard mid-point rule. Spatial discretization is based on the four-noded isoparametric element. Particular attention is devoted to the consistent linearization of the weak form of the initial boundary value problem discretized in time and space, in order to achieve a quadratic rate of asymptotic convergence typical for the Newton-Raphson based solution procedures. An unconditionally stable time finite element formulation suitable for the long-term dynamic computations of flexible shell-like structures, which may be undergoing large displacements, large rotations and large motions is therefore obtained. A set of numerical examples is presented to illustrate the present approach and the performance of the isoparametric four-noded shell finite element in conjunction with the implicit energy and momentum conserving time-integration algorithm energy-momentum method non-linear shell dynamics finite elements končni elementi mehanika ploskovne konstrukcije integracijski algoritmi nelinearna dinamika lupine true false false Wiley Angleški jezik Angleški jezik Neznano 2015-07-10 21:04:34 2015-07-10 21:04:34 2022-11-22 10:20:43 0000-00-00 00:00:00 1998 0 0 Str. 409-442 Vol. 42 Vol. 42 1998 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.3 0029-5981 140135 6316039 ijnmce1998_Brank_k.pdf ijnmce1998_Brank_k.pdf 1 542B0AAC889E02CBFE4F0491938852E2 c59c13a14e9a026dfdd0c430cc2feabc96fff11f4bae549ed884e7835d769248 1520375a-a1ae-11eb-a523-00155dcfd717 20.500.12556/rul/fef0c11c-ee98-4357-a464-bc83543e59f5 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=85713 Fakulteta za gradbeništvo in geodezijo 0 0 0