Granična čvrstoća trupa korodiranih naftnih tankera

Jurišić, Paul and Parunov, Joško (2014) Granična čvrstoća trupa korodiranih naftnih tankera. = Hull girder ultimate strength of aging oil tankers. In: XXI. simpozij Teorija i praksa brodogradnje, in memoriam prof. Leopold Sorta = The 21st symposium Theory and practice shipbuilding, in memoriam prof. Leopold Sorta, 02-04.10.2014., Baška; Croatia.

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Abstract (Croatian)

Korozijska istrošenja i zamorne pukotine su jedan od glavnih razloga kolapsa konstrukcije trupa kod ostarjelih brodova. Pod djelovanjem opće korozije dolazi do smanjenja debljina elemenata trupa, a samim tim i smanjenja momenta otpora glavnog rebra, koja uzrokuju pad nosivosti brodske konstrukcije. U ovom radu analiziran je utjecaj opće korozije na graničnu čvrstoću tri naftna tankera na temelju izvještaja o mjerenju debljina nakon 10, 15 i 20 godina. Nejednolika korozija i zamorne pukotine su približno simulirane smanjenjem geometrijskih karakteristika poprečnog presjeka trupa u svrhu procijene njihovog utjecaja na graničnu čvrstoću. Granična uzdužna čvrstoća je provjerena na temelju metode progresivnog kolapsa (PCA) upotrebom programa MARS klasifikacijskog zavoda Bureau Veritas i završno rezultati proračuna su uspoređeni s važečim IMO zahtjevima.

Abstract

Corrosion wastage and fatigue cracks are the most important causes of structural degradation of aging ships. General corrosion uniformly reduces thickness of structural elements and structural strength may be evaluated based on such reduced scantlings. In this paper, effect of uniform corrosion on hull girder ultimate strength (HGUS) of three oil tankers is assessed based on thickness measurement reports after 10, 15 and 20 years. The effects of non-uniform corrosion and fatigue cracks are approximately simulated by reducing affected cross-sectional area to evaluate their impact on the ultimate strength. Ultimate longitudinal strength is calculated by progressive collapse analysis using program MARS while results are compared to the IMO requirements.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: granična čvrstoća, korozijska istrošenja; mjerenje debljina; zamorne pukotine
Keywords (Croatian): ultimate strength; corrosion; thickness measurements; fatigue cracks
Subjects: TECHNICAL SCIENCE > Shipbuilding
Divisions: 600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 15 May 2015 12:00
Last Modified: 18 May 2015 09:35
URI: http://repozitorij.fsb.hr/id/eprint/4166

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