Proračun čvrstoće i krutosti glavnog nosača mosnog krana nesimetrične izvedbe metodom konačnih elemenata

undergraduate thesis

• Title (english): Strength and stiffness assessment of main bridge crane girder with asymmetrical design by finite element method
• Author: Filip Šmintić
• Mentor: Tomislav Lesičar (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2025-02-10, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U ovom radu proveden je numerički proračun čvrstoće i krutosti glavnog nosača mosne dizalice konstruirane za rukovanje zaštitnim poklopcima na komorama za ispitivanje materijala za izgradnju fuzijskih elektrana. U uvodnom dijelu rada objašnjena je motivacija rada te su opisane osnovne značajke samog procesa nuklearne fuzije, ogroman potencijal koji fuzija posjeduje te samim time i opravdanost ulaganja ogromnih resursa u tom području, ali i veliki izazovi s kojima se znanstvenici još uvijek suočavaju. U drugom poglavlju dan je teorijski pregled metode konačnih elemenata te su opisane osnovne karakteristike korištenih konačnih elemenata te važne značajke kod modeliranja kontakta. Zatim je na temelju postojećeg CAD modela s određenim preinakama u geometriji kako bi se pojednostavila analiza kreiran numerički model s grednim, odnosno heksaedarskim elementima. Potom je provedena analiza metodom konačnih elemenata u programskom paketu Abaqus. Za dva kritična slučaja opterećenja, odnosno dva različita položaja tereta na glavnom nosaču mosne dizalice, određeno je stanje naprezanja i pomaka glavnog te čeonog nosača koji služi kao oslonac glavnom nosaču. Rezultati dobiveni numeričkom analizom zatim su interpretirani i uspoređeni s rezultatima dobivenim analitičkim proračunom prema normi EN 13001 na temelju čega je donesen zaključak.

Abstract (english)

This thesis considers the strength and stiffness assessment of main bridge crane girder intended for the handling of protective covers on the chambers for testing materials for the construction of a fusion power plant. In the introductory part of the paper, the motivation of the work is explained and the basic features of the nuclear fusion process, the enormous potential that fusion possesses and thus the justification of investing huge resources in that area are described, as well as the great challenges that scientists still face. In the second chapter, a theoretical overview of the finite element method is given and the basic characteristics of the used finite elements and important features in contact modeling are described. Then, based on the existing CAD model with certain modifications in the geometry in order to simplify the analysis, a numerical model with beam and hexahedral elements was created. The analysis was then carried out using the finite element method in the Abaqus software package. For two critical load cases, that is, two different positions of the load on the main girder of the bridge crane, the state of stress and displacement of the main girder and the end girder, which serves as a support for the main girder, was determined. The results obtained by numerical analysis were then interpreted and compared with the results obtained by analytical calculation according to EN 13001.

• Keywords: mosni kran; metoda konačnih elemenata; numeričko modeliranje; Abaqus
• Keywords (english): bridge crane; finite element method; numerical modelling; Abaqus
• Language: croatian
• URN:NBN: urn:nbn:hr:235:150149
• Study programme: Title: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering; Course: Engineering Modelling and Computer Simulation; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2027-01-29
• Created on: 2025-02-06 15:10:41