Modeliranje pramca u analizi sudara brodova

master's thesis

• Title (english): Bow structure modelling in ship collision analysis
• Author: Tin Blažeka
• Mentor: Smiljko Rudan (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-07-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Shipbuilding; Constructive of Floating and Maritime Structures

Abstract

Sudari brodova rijetki su događaji, ali takvi koji mogu imati katastrofalne posljedice: gubitak
ljudskih života, oštećenje brodske konstrukcije i onečišćenje okoliša. Zbog toga, tijekom
konstruiranja brodske konstrukcije veoma je bitno obratiti pažnju na odziv konstrukcije uslijed
takvog događaja. Zbog praktičnih razloga kao što su cijena i vrijeme, eksperimentalna
istraživanja su rijetka te se umjesto njih provode numerička istraživanja. Također, kao dobar
izvor podataka za konstruiranje novog broda s obzirom na odziv tijekom sudara, na
raspolaganju stoje podatci o nesrećama koje su se već dogodile. Na početku ovog rada bit će
spomenute neke od njih kako bi se stvorila općenita slika problematike. Cilj ovog rada je
prikazati proces detaljnog modeliranja pramca broda za prijevoz sirove nafte, izrada adekvatne
mreže konačnih elemenata te priprema nekoliko scenarija sudara takvog pramca s krutim
zidom. Proračun sudara bit će proveden korištenjem nelinearne metode konačnih elemenata s
naglaskom na analizu unutarnje mehanike sudara i strukturnu analizu konstrukcije. Priprema
scenarija sudara uključuje prikaz postavljanja parametara proračuna kojima se pokušava što
vjernije opisati stvarni događaj. Na kraju će biti analizirani i prikazani najbitniji podatci
dobiveni proračunom. Proračun je proveden uz pomoć programskog paketa „LS-DYNA“.

Abstract (english)

Ship collisions are rare events, but they can have catastrophic consequences: loss of human
lives, damage to the ship's structure, and environmental pollution. Therefore, during the design
of a ship's structure, it is crucial to pay attention to its response in such an event. Due to practical
reasons such as cost and time, experimental research is scarce, and numerical investigations are
conducted instead. Additionally, dana from accidents that have already occurred serve as
valuable sources of data for designing a new ship, specifically regarding the structural response
during a collision. Some of these accidents will be mentioned at the beginning of this paper to
provide a general overview of the issue. The aim of this paper is to present the process of
detailed modeling of the bow of a crude oil carrier ship, the creation of an appropriate finite
element mesh, and the preparation of several collision scenarios involving striking bow and
rigid wall. The calculation of collision will be performed using a nonlinear finite element
method, focusing on the analysis of internal collision mechanics and structural analysis of the
construction. The preparation of collision scenarios includes defining calculation parameters
that aim to accurately describe the real event. Finally, the most important data obtained from
the calculation will be analyzed and presented. The calculation was carried out using the
software package "LS-DYNA."

• Keywords: sudar broda; strukturna analiza konstrukcije; nelinearna metoda konačnih elemenata; LS-DYNA; 3D model pramca broda; numeričko istraživanje
• Keywords (english): ship collision; structural analysis of the construction; nonlinear finite element method; LS-DYNA; ship bow 3D model; numerical investigation
• Language: croatian
• URN:NBN: urn:nbn:hr:235:912799
• Study programme: Title: Naval Architecture; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka brodogradnje (magistar/magistra inženjer/inženjerka brodogradnje)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-07-05 12:26:18