Polaganje podmorskih cjevovoda u obalnom području

Čorić, Većeslav and Ćatipović, Ivan and Radanović, Jadranka (2012) Polaganje podmorskih cjevovoda u obalnom području. = Subsea pipe laying in coastal area. In: XX. simpozij Teorija i praksa brodogradnje, in memoriam prof. Leopold Sorta = The 20th symposium Theory and practice shipbuilding, in memoriam prof. Leopold Sorta, 27-29.09.2012., Zagreb; Croatia.

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Abstract (Croatian)

Hidrodinamičko opterećenje valova i morske struje te savijanje uslijed zakrivljenosti morskog dna dva su bitna problema kojima u projektu podmorskih cjevovoda za transport nafte i plina treba posvetiti nužnu pažnju u obalnom području. U članku je opisan metodološki postupak dimenzioniranja i provjere stabilnosti čeličnog, betonom obloženog podmorskog cjevovoda, slobodno položenog na zakrivljeno morsko dno. Ravnotežni položaj savinutog cjevovoda koji je izložen radnom, gravitacijskom i hidrodinamičkom opterećenju, određen je na nelinearnom strukturnom modelu konačnih elemenata. Model uključuje geometrijsku nelinearnost uslijed velikih pomaka i nelinearnost uslijed kontaktnog problem između cjevovoda i morskog dna. Ilustrativnim primjerom prikazan je način definiranja projektnog stanja mora i dana je usporedba bitnih rezultata dobivenih vremenskom simulacijom s rezultatima važećih propisa.

Abstract

Two essential problems characterize design and installation of the subsea pipeline in the coastal area: strong hydrodynamic loading due to waves and sea current as well as the bending loading of the pipe on the curved sea bottom. In the article it is given the description of structural and stability analysis of the concrete coated steel pipe when it is laid on the uneven sea bottom near the coast. The equilibrium shape of the bended pipeline when it is exposed to gravitational, operating and hydrodynamic loading is analyzed by the nonlinear finite element model which includes the large displacement and the contact problems between the pipe and sea bottom. The illustrative example shows how to define the relevant design sea state necessary for assessment of the subsea pipeline structural integrity and stability on the sea bottom. The results obtained by time simulations are compared with the accepted standards.

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: podmorski cjevovod; hidrodinamičko opterećenje; savijanje elastičnog tijela na neravnoj podlozi
Keywords (Croatian): subsea pipeline; hydrodynamic loading; bending of the elastic body on the curved support
Subjects: TECHNICAL SCIENCE > Shipbuilding
Divisions: 600 Department of Naval Engineering and Marine Technology > 630 Chair of Ship Design and Offshore Technology
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 14 May 2015 12:55
Last Modified: 18 Oct 2017 06:25
URI: http://repozitorij.fsb.hr/id/eprint/4148

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