Naslov
Reinforcement of Imperfect Hemispherical Head of Bilobe Cargo Tank in Liquefied Petroleum Gas Carrier

Autori
Senjanović, Ivo ; Rudan, Smiljko ; Ljuština, Ana Maria

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), ostalo

Izvornik
Proceedings of Special Workshop: Advanced Numerical Analysis of Shell-like Structures / Jurica Sorić - Zagreb : Hrvatsko društvo za mehaniku (HDM), 2007, 269-278

ISBN
978-953-7539-00-9

Skup
Special Workshop: Advanced Numerical Analysis of Shell-like Structures

Mjesto i datum
Zagreb, Hrvatska, 26.09.2007. - 28.09.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
LPG Carrier; bilobe tank; misalignment; reinforcement; strength; FEM

Sažetak
The work describes the remedy for misalignment at the joint of two segments of hemispherical head of a bilobe cargo tank. The misalignment is the result of relatively thin spherical shell and production difficulties. Measurements of out-ofroundness show rather large deviation of meridional chamber and variation of radius in the head cross-section plane. At the ends of the segments the spherical form is deviated into a conical shape. As a result the peak of meridional generatrix occurs, which causes high stress concentration. Cross-section of the hemisphere at the segment joint is reinforced with a ring in order to overtake bending moment caused by the variation of circular radius. The ring dimensions are determined based on an approximate consideration. Stress concentration at the segment joint is reduced by two additional rings connected with a set of bars in the meridional direction. Stress distribution in the actual imperfect and reinforced structure is determined by the finite element method. Total static plus dynamic tank pressure is taken into account.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

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