zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo
Urban Cotič (Author), Miha Boltežar (Mentor)

Abstract

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.

Keywords

diplomske naloge;numerična analiza;primerjava končnih elementov;mehanska nihanja;modalna analiza;lastne oblike;programski jeziki;ADPL;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [U. Cotič]
UDC: 534:519.61:004.942(043.2)
COBISS: 16774171 Link will open in a new window
Views: 975
Downloads: 291
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Other data

Secondary language: English
Secondary title: Modal analysis of thin sheet plates
Secondary abstract: 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.
Secondary keywords: numerical analysis;finite element comparison;mechanical oscillations;modal analysis;mode shapes;programming languages;ADPL;
Type (COBISS): Final paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za strojništvo
Pages: XIV, 37 f.
ID: 11212367
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