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Modalna analiza tankih pločevin
Cotič, Urban (Author), Boltežar, Miha (Mentor) More about this mentor... This link opens in a new window

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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.

Language:Slovenian
Keywords:numerična analiza, primerjava končnih elementov, mehanska nihanja, modalna analiza, lastne oblike, programski jeziki, APDL
Work type:Final paper (mb12)
Tipology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Year:2019
Publisher:[U. Cotič]
Number of pages:XIV, 37 f.
UDC:534:519.61:004.942(043.2)
COBISS.SI-ID:16774171 Link is opened in a new window
Views:321
Downloads:185
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Secondary language

Language:English
Title:Modal analysis of thin sheet plates
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.

Keywords:numerical analysis, finite element comparison, mechanical oscillations, modal analysis, mode shapes, programming languages, ADPL

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