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sisvu:description Modeliranje odziva pomoću MKE: specijalni konačni elementi u brodskim strukturama. Superelementi. Makroelementi ukrepljenog panela, grede s koljenima, tankostjene ćelije (dvodno, dvobok) veznog sklopa, korugirane pregrade. Proračunske procedure. Transformacije nesimetričnih opterećenja. Rubni uvjeti. Kontrola i prezentacija ulaznih podataka i rezultata proračuna. Geometrijska i materijalna nelinearnost. Osnovne procedure nelinearnih proračuna za poprečne brodske okvire. Poračun podobnosti elemenata i sklopova: Izdržljivost i zahtjev. Funkcije oštećenja. Proračun izdržljivosti analitičkim metodama. Izvijanje i granična čvrstoća stupova. Granična čvrstoća ploča. Elastično izvijanje ukrepljenih ploča. Granična čvrstoća 3D tankostjenog modula brodske konstrukcije. Proračun pouzdanosti konstrukcije. Granična ploha sigurnosti. Mjere pouzdanosti konstrukcja i procjena parametara za proračun pouzdanosti. Metode integracije i simulacije. Transformacijske metode. Pouzdanost sustava. Paralelni i serijski sustavi. Granica pouzdanosti sustava. Pouzdanost u vremenu. Modeliranje opterećenja i izdržljivosti. Propisi u brodogradnji. Sadržaj vježbi: Proračun jednog dijela brodske konstrukcije numeričkim i analitičkim metodama. (hr)
sisvu:description Structural response modelling based on FEM: special finite elements in ship structures. Superelements. Macroelements for stiffened panel, bracketed beam, thin cells (double bottom, double walls), brackets, corrugated bulkheads. Computational procedures. Transformation of asymmetric loads. Boundary conditions. Verifying and presentation of input data and the results of calculations. Geometric and material non-linearity. Basic non-linear procedures for calculation of ship web frame. Calculation of adequacy of elements and substructures: capability and demand. Failure function. Analytical calculation of capability. Buckling and ultimate strength of pillars. Ultimate strength of panels. Elastic buckling of stiffened panels. Ultimate strength of stiffened panels. Buckling of grillages. Library of design formulae for design of stiffened panels. Ultimate strength of 3D thin walled ship structures. Calculation of reliability of the structure: safety margin. Reliability measure of the structure and estimation of parameters for reliability calculation. Integration and simulation methods. Transformation methods. Reliability of structural systems. Parallel and serial systems. Reliability margin of the structural system. Reliability in time domain. Load and capability modelling. Regulations in naval architecture. Exercises: Calculation of a part of ship structure, using numerical and analytical methods. (en)
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