Utjecaj bočnog nagiba na granični moment savijanja oštećenog broda

Bužančić Primorac, Branka and Parunov, Joško and Žiha, Kalman (2014) Utjecaj bočnog nagiba na granični moment savijanja oštećenog broda. = Influence of the heeling angle on ultimate bending capacity of damaged ship. 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)

U slučaju oštećenja brodske konstrukcije, potrebno je donositi brze odluke, koje se zasnivaju na procjeni utjecaja oštećenja na sigurnost broda, koristeći pritom metode proračuna granične čvrstoće. Uobičajeno je da se procjena sigurnosti oštećenog broda u uspravnom položaju provodi u odnosu na granični vertikalni moment savijanja. Međutim, stanje ravnoteže oštećenog broda može se značajno promijeniti, pri čemu dolazi do promjene gaza, trima i bočnog naginjanja broda. Kod bočnog nagiba, moment savijanja se može razložiti na dvije komponente, jednu okomitu na i drugu paralelnu s neutralnom linijom neoštećenog trupa. Isti problem možemo također razmatrati na način da opterećenje uspravnog broda složenim momentom savijanja razložimo na vertikalnu i horizontalnu komponentu. Ovakvim problemima obično se pristupa koristeći nelinearnu jednadžbu sa spregnutim vertikalnim i horizontalnim momentom savijanja. Cilj ovog članka je dati pregled objavljenih radova koji sadržavaju takve spregnute jednadžbe i jednu od njih primijeniti na oštećeni tanker opterećen složenim momentom savijanja uslijed bočnog nagiba broda. Svrha rada je procjena utjecaja bočnog nagiba broda na sigurnost oštećene brodske konstrukcije.

Abstract

When a ship is damaged, the operators need to decide on immediate repair actions by evaluating the effects of the damage on the safety of the ship using residual strength assessment procedures. Safety assessments are usually performed with respect to the ultimate vertical bending moment capacity assuming upright position of damaged ship. However, floating conditions of damaged ship could be changed dramatically resulting in change of the draught and trim and also inducing the important heeling angle. In case of the ship heeling the bending moment can be decomposed in two components, one perpendicular and other one aligned to the neutral axis of the intact ship. The problem is equivalent as considering upright damaged section loaded by combined vertical and horizontal bending moments. Such problem is commonly approached by nonlinear interaction equation between vertical and horizontal bending moments. The aims of the present paper are firstly to review literature with such interaction equations published and then to apply one of them on the example of damaged tanker loaded by combined bending moments caused by the heeling angle. The purpose is to evaluate importance of the heel on the structural safety of damaged ship.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: oštećeni tanker; granična čvrstoća; bočni nagib
Keywords (Croatian): damaged tanker; ultimate strength; heeling angle
Subjects: TECHNICAL SCIENCE > Shipbuilding
Divisions: 600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
600 Department of Naval Engineering and Marine Technology > 640 Chair of Shipbuilding Technology
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 15 May 2015 11:44
Last Modified: 05 Oct 2017 12:53
URI: http://repozitorij.fsb.hr/id/eprint/4165

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