24 KB402 KB19 KB199920252008Baličević, PavoKozak, DražanMrčela, Tomislavštevilka:10letnik:548 stranistr. 685-692ISSN:0039-2480COBISSID:10725659URN:URN:NBN:SI:doc-0E2ILTTZenAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestniknapetostitlačne posodetrdonostStrength of pressure vessels with ellipsoidal heads|A method for stress analysis in cylindrical pressure vessels with ellipsoidal heads, based on the axisymmetric shell theory, was proposed. The starting point were the approximate solutions of the differential equation system that were used to get mathematical expressions for determining internal forces, moments and displacements in the vessel walls. Final expressions that can be applied were acquired by joining the membrane and moment theory and by settingand solving equations of boundary conditions. Diagrams that show distribution of internal forces and moments are in dimensionless form which enables their use regardless of dimensions and load. These expressions were used to develop a method for testing strength of pressure vessels with ellipsoidal heads in the design phase. Application of the method was shown on a selected numerical example, while a special computer programme was created for calculation purposesPredlagana je metoda za analizo napetosti v valjastih tlačnih posodah z elipsoidnim pokrovom na osnovi teorije osno-simetričnih lupin. Izhodišče so bile aproksimativne rešitve sistema diferencialnih enačb, iz katerih so bili pridobljeni matematični izrazi za določanje notranjih sil, momentov in pomikov v stenah posod. Končni uporabni izrazi so bili pridobljeni z združitvijo teorije membran in momentov ter z nastavitvijo in resevanjem enačb robnih pogojev. Diagrami, ki prikazujejo porazdelitev notranjih sil in momentov, so v brezrazsežni obliki, ki omogoča njihovo uporabo ne glede na izmere in obremenitve. Ti izrazi so bili uporabljeni za razvoj metod za preizkušanje trdnosti tlačnih posod z elipsoidnim pokrovom v fazi konstrukcije. Prikazana je uporaba metode na izbranem numeričnem primeru, za namene izračunavanja pa je bil razvit poseben računalniski programTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo