Ultimate strength of ship hulls under torsion

Paik, Jeom Kee; Thayamballi, Anil Kumar; Pedersen, Preben Terndrup; Park, Yong Il

doi:10.1016/s0029-8018(01)00015-4

Cited by 50 publications

(29 citation statements)

References 6 publications

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“…For analysis of the internal mechanics in collisions and grounding, the rectangular plate element, the stiffened panel element, and the gap/contact element have been developed Pedersen, 1996, Paik andThayamballi, 2003). Ueda and Rashed (1991) and Yao (2005) reviewed some advances in ISUM which has been applied for various purposes such as ultimate strength analysis of ship structures (Paik et al, , 2001b, ship collision analysis (Paik et al, 1999, Brown et al, 2000 and collapse analysis of tubular offshore structures (Moan et al, 1985).…”

Section: Some Considerations Of Isum Modeling and Related Literature mentioning

confidence: 99%

Idealized structural unit method and its application to progressive hull girder collapse analysis of ships

Paik¹,

Seo²,

Kim³

2006

Ships and Offshore Structures

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Idealized structural unit method (ISUM) is now well recognized as one of the most efficient methods to analyze nonlinear behavior of large-sized structures under extreme or even accidental actions. This paper presents some techniques of ISUM modeling and surveys the literature on the ultimate limit state assessment of ship structures using ISUM. Theoretical formulations of ISUM elements for the progressive hull girder collapse analysis of ships that were implemented into ALPS/HULL computer code are outlined. Some benchmark studies are made by a comparison with physical test data and ALPS/HULL analyses on a frigate ship hull model under sagging moment tested by UK Royal Navy and on two double-skin tanker hull models under sagging or hogging moments tested by US Navy. Some ALPS/HULL application examples to progressive collapse analysis of a double-skin shuttle tanker hull under combined vertical and horizontal bending moments are then demonstrated. It is concluded that ISUM is very useful for the progressive hull girder collapse analysis of ships because it provides very accurate results while the computing time is very short.

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Section: Some Considerations Of Isum Modeling and Related Literature mentioning

confidence: 99%

Idealized structural unit method and its application to progressive hull girder collapse analysis of ships

Paik¹,

Seo²,

Kim³

2006

Ships and Offshore Structures

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“…An important issue was the significant double bottom bending in empty holds in AHL due to combined global hull girder bending moment and local loads. Paik, J.K 2001 [7] investigated the ultimate strength characteristics of ship hulls with large hatch opening under torsion. Axial (warping) as well as shear stress is normally developed for thin-walled beams with open cross sections subjected to torsion.…”

Section: Introductionmentioning

confidence: 99%

Study on ultimate strength of ship’s hull considering cross section and beam finite element.

Alie¹,

Juswan²,

Wahyuddin³

et al. 2018

MATEC Web Conf.

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Abstract. The objective of the present research is to study the ultimate strength of ship's hull considering cross section and beam finite element under longitudinal bending. The single hull bulk carrier and double hull oil tanker are taken to be analysed. The one-frame space of ship is considered in the calculation. The cross section of ship's hull is divided into element composed plate and stiffened plate. The cross section is assumed to be remained plane and the simply supported is imposed to both side of the cross section. The longitudinal bending moment is applied to the cross section for hogging and sagging condition. The Smith's method is adopted and implemented into the in-house program of the cross section and beam finite element to calculate the ultimate strength of ship's hull. The result of the ultimate strength for hogging and sagging condition obtained by considering the cross section and beam finite element is compared with one another.

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“…Khan and Das [13] derived the bending moments based on a stress-strain relationship, and the residual strength of one tanker and two bulk carriers were determined using Smith's method. Paik et al [14] studied the ultimate strength characteristics of ship hulls under torsion with large hatch openings. Wang et al [15] derived the method for the calculation of the residual strength of a hull girder for a broad spectrum of accidents, independently from the principal dimensions of a ship, with a great advantage in cases of emergency or salvage operation.…”

Section: Introductionmentioning

confidence: 99%

Calculation on the Uprighting Process of a Capsized Ship

Pan

Lin

Liu

et al. 2016

Brod

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SummaryThe processes of marine salvage require firstly the uprighting of the capsized ship, essentially bringing the deck to point up. Analysis and computation are the keys for the success in the application of the design schemes. Up to date, there are few researches on calculation methods for uprighting process of capsized ships at China and abroad. Researches about the effect of flooding quantity and the variation of the longitudinal strength during the uprighting process of capsized and damaged ships are even rarer. In this paper, hydromechanical equations to describe the effect of flooding are established and a calculation method for the longitudinal strength is introduced with reference to the hydrostatic theory for ships. Three typical uprighting processes are summarized according to the methods of treatment of damaged compartment. The stability of the inverted ship is calculated and analyzed using the General Hydrostatics software(GHS). Reserve buoyancy, shear forces, bending moments and torques are calculated in nine positions along the ship.

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Ultimate strength of ship hulls under torsion

Cited by 50 publications

References 6 publications

Idealized structural unit method and its application to progressive hull girder collapse analysis of ships

Idealized structural unit method and its application to progressive hull girder collapse analysis of ships

Study on ultimate strength of ship’s hull considering cross section and beam finite element.

Calculation on the Uprighting Process of a Capsized Ship

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