20.500.12556/RUL-109416 Modalna analiza tankih pločevin Modal analysis of thin sheet plates Pri numerični modalni analizi tankih pločevin je za mreženje modela na voljo množica variant končnih elementov. V okviru zaključne naloge sta obravnavani dve, namen primerjave pa je ugotoviti smiselnost uporabe ploskovnih elementov proti volumskim elementom pri analizi tankih pločevin. Simulacije so v celoti napisane v APDL programskem jeziku, kateri se v ozadju izvaja v nekaterih komercialnih simulacijskih orodjih. Kot prvo je bil obravnavan preprost primer ravne pravokotne tanke plošče brez vpetja. Frekvenčni odziv sistema je bil najprej določen analitično. V nadaljevanju je bila izvedena numerična modalna analiza plošče, skladnost rezultatov pa je pričala o pravilno postavljenem numeričnem modelu. V nadaljevanju so bili obravnavani dinamski odzivi varjenih in ojačanih profilov, s kakršnimi se pogosto srečujemo v industriji. When performing numerical modal analysis of thin plates, one has a palette of finite element types to choose from. In this assignment, two of those are analyzed more in-depth and the purpose of the comparison is to find the benefits of using shell type elements in place of, more typical, 3D elements while performing numerical modal analysis of thin plates. All of the simulations have been written in raw APDL programming language, which is also ran by commercial simulation tools in the background. Firstly, a simple, square thin plate without supports was analyzed. Analytically calculated natural frequencies served as a reference and finite element method analysis was then performed using both types of finite elements. Numerical modal analysis of the plate was performed next and complying results confirmed the code itself, as the numerical models were correct. Dynamic response of welded and reinforced profiles, often used in real-life products, was analyzed next. numerična analiza primerjava končnih elementov mehanska nihanja modalna analiza lastne oblike programski jeziki APDL numerical analysis finite element comparison mechanical oscillations modal analysis mode shapes programming languages ADPL true false false [U. Cotič] Slovenski jezik Angleški jezik Zaključna naloga 2019-09-01 07:46:35 2019-09-01 07:46:36 2023-10-27 08:38:04 0000-00-00 00:00:00 2019 0 Ljubljana 0 XIV, 37 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 534:519.61:004.942(043.2) 215526 16774171 3762.pdf 3762.pdf 1 C17916ABE71B94040FD7285947F73368 d0544865af373e811023135a113e4a165e3d35d73fe74def8cb2a2cb0955a059 db6a940d-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=120964 Fakulteta za strojništvo 0 0 0