Analiza udarnog opterećenja na elastične nosače

undergraduate thesis

• Title (english): Analysis of impact loading on elastic beams
• Author: Leopold Samodol
• Mentor: Ivan Duvnjak (mentor)
• Committee member: Ivan Duvnjak (predsjednik povjerenstva)
• Committee member: Ana Skender (član povjerenstva)
• Committee member: Marina Frančić Smrkić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Engineering Mechanics); Zagreb
• Defense date and country: 2022-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract

U teorijskom dijelu završnog rada obrađena je tema “Analiza udarnog opterećenja na elastične nosače”. Za cilj je prikazati i definirati općenite teorijske postavke i značajke o savijanju nosača kroz zakonitosti uvjeta ravnoteža sila i momenata, zatim sve zakonitosti pobliže prikazati slikama i pripadajućim izvodima. Nadalje je obrađena analiza naprezanja i deformacija pri dinamičkom opterećenju nosača za slučaj poprečnog udarnog opterećenja utega na nosač. Analiza je obrađena uz određene pretpostavke koje uzimaju u obzir odnos mase nosača i utega te se proračun vrši za idealan slučaj gdje nema gubitka energije u sustavu. Kroz analizu je ukratko odrađen utjecaj opruge na progib nosača. Također u sklopu opisa analize udarnog opterećenja je obrađeno i aksijalno udarno opterećenje za slučaj konstantnog presjeka i za slučaj složenog štapa s različitim poprečnim presjecima. U praktičnom dijelu završnog rada riješen je zadatak koji za cilj ima prikazati utjecaj visine na naprezanje u nosaču te utjecaj promjene visine poprečnog presjeka na maksimalnu visinu s koje teret može pasti, a da ne dođe do sloma. Za zadatak je napravljen proračun, excel tablice i dijagrami koji jednostavno prikazuju tražene odnose.

Abstract (english)

In the theoretical part of the final paper, I dealt with the topic "Analysis of impact load on elastic beams". The goal was to show and define the general theoretical assumptions and features about the bending of beams through the laws of the balance of forces and moments, then show all the laws in more detail with pictures and associated extracts. Furthermore, the stress and deformation analysis during the dynamic loading of the beam for the case of transverse impact load of the weights on the support was processed. The analysis was processed with certain assumptions which take into account the ratio of the mass of the beam and weights. The calculation was made for the ideal case where there is no energy loss in the system. Through the analysis, the influence of the spring on the deflection of the beam was taken in account. Also, as part of the description of the impact load analysis, the axial impact load for the case of a constant cross-section and for the case of a compound rod with different cross-sections was processed. In the practical part of the final paper, the given task was solved, which aim was to show the influence of height on the stress in the beam and the influence of the change in the height of the cross-section on the maximum height from which the load can fall without breaking. A calculation, excel tables and diagrams were made for the given task, which show the required relations.

• Keywords: savijanje; dinamičko opterećenje; naprezanje; deformacija; aksijalno opterećenje
• Keywords (english): bending; dynamic load; strain; stress; axial load
• Language: croatian
• URN:NBN: urn:nbn:hr:237:616212
• Study programme: Title: Civil Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-03-28 11:12:30