Strukturna analiza broda za prijevoz žive stoke

master's thesis

• Title (english): Structural analysis of livestock carrier
• Author: David Subašić
• Mentor: Jerolim Andrić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-07-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Shipbuilding; Constructive of Floating and Maritime Structures

Abstract

Diplomski rad bavi se strukturnom analizom broda za prijevoz žive stoke projektiranog u tvrtki „Flow Ship Design“ u Puli. Brodove za prijevoz žive stoke karakteriziraju veliki otvori u vanjskoj oplati iznad palube nadvođa te nepostojanje poprečnih i uzdužnih pregrada u strukturi nadgrađa. Takva izvedba konstrukcije zahtjeva primjenu direktnog proračuna odziva korištenjem metode konačnih elemenata (MKE). Stoga je u diplomskom radu na temelju nacrta glavnog rebra i općeg plana izrađen generički 3D MKE model s ciljem analize tri strukturna modela opterećenja. U prvom modelu provedena je analiza uzdužne čvrstoće te izračunata efikasnost nadgrađa korištenjem Caldwellove projektne formule. Drugi strukturni model bavi se analizom poprečne čvrstoće uslijed gibanja broda na valovima što izaziva klimanje nadgrađa. Naposljetku, analizirana je lokalna čvrstoća paluba na kojima je smješten teret (stoka) implementiranjem opterećenja zahtijevanih AMSA (Australian Maritime Safety Authority) propisima. Navedeni modeli analizirani su upotrebom linearnog statičkog proračuna metodom konačnih elemenata u aplikaciji MAESTRO. U svakom od razmatranih strukturnih problema identificirani su nepodobni konstrukcijski elementi te je prikazan prijedlog novih konstrukcijskih dimenzija elemenata kojima se zadovoljavaju svi uvjeti strukturne podobnosti.

Abstract (english)

The thesis deals with structural analysis of a livestock carrier designed by „Flow Ship Design“ company, located in Pula, Croatia. This type of ship structure is characterized by large openings in the superstructure and the absence of transverse and longitudinal bulkheads in the superstructure. Such design requires direct strength calculation using finite element method (FEM). Therefore, generic 3D FE model is made using MAESTRO software. The model is made according to the midship section drawing and general arrangement. Three structural models were analyzed. Firstly, longitudinal strength analysis is performed and level of superstructure participation in the hull girder bending is calculated using Caldwell ’s formula. The second structural model deals with transverse/racking strength when a ship is rolling. Finally, the local strength of the deck on which the cargo (livestock) is placed is analyzed. Loads are implemented in accordance with AMSA (Australian Maritime Safety Authority) rules. These models are analyzed using linear static finite element calculation. In each of the considered structural problems, feasibility analysis is made. Structurally inadequate elements have been identified and a proposal of new structural dimensions of elements that meet all the conditions are presented.

• Keywords: brod za prijevoz žive stoke; metoda konačnih elemenata; uzdužna čvrstoća; efikasnost nadgrađa; poprečna čvrstoća; klimanje nadgrađa; lokalna čvrstoća; AMSA; MAESTRO; podobnost
• Keywords (english): livestock carrier; finite element method; longitudinal strength; superstructure bending efficiency; transverse strength; racking; local strength; AMSA; MAESTRO; feasibility analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:235:259443
• 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; Embargo expiration date: 2023-07-08
• Created on: 2021-07-08 08:13:22