Experimental study of a ship with the self-righting moment in extreme condition

Trimulyono, Andi; Zakki, Ahmad Fauzan; Fuadi, M A

doi:10.1088/1755-1315/1081/1/012006

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…The self-righting moment is a concept where the ship can return to its upright position after being upside down to a certain degree or even completely upside down (180°) without the help of an external force. The previous study of a patrol boat with an effective self-righting moment was performed using experimental and numerical methods [1,2]. The results showed that the numerical method has the same phenomenon as the experiment: the ship has self-righting in all condition load cases.…”

Section: Introductionmentioning

confidence: 93%

“…This influence can be seen from the area of the stability arm curve (GZ curve), where the elevation of the superstructure affects the maximum GZ magnitude and the angle at which the maximum GZ [13]. The present study is based on previous works [1], i.e., a patrol boat with four variations using different deckhouse heights where there are heights of 2.01 m to a height of 2.31 m with a difference of 0.1 m each. The analysis results showed that the condition of the ship with the lowest deckhouse height does not have an excellent self-righting IOP Publishing doi:10.1088/1755-1315/1298/1/012004 2 moment compared to the other variations, whereas in a fully loaded condition, a patrol boat with a deckhouse of 2.01 m has a negative moment at an angle at 17°.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of deck house height and center of gravity in anti-capsize patrol boat

Taqi,

Trimulyono,

Mursid

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The design of patrol boats, especially in Indonesian waters which have extreme sea conditions, requires fairly good stability capabilities and special self-righting capabilities. Designing a self-righting ship will be closely related to the ship stability because the center of gravity (G) is affected by the load and the height of the deckhouse of a ship, which has implications for the ship’s self-righting. Present study was carried out with experimental study for patrol boat design that has capability self-righting moment. The patroal boat has 4 deckhouse height variations with 2.01 m, 2.11 m, 2.21 m, and 2.31 m, respectively. There are 4 variations of the load conditions, i.e., the condition with 50% of the maximum amount of cargo, the condition 50% the passengers and cargo, full load condition without passengers, and the last one is the condition of the passenger baggage is only 50%. The results showed that a deckhouse with a height of 2.01 m has the worst GZ curve analysis, where in some conditions the results touch a negative number before heeling to 180°. The results showed by trial and error that the minimum deckhouse height is 2.07 m to have a self-righting moment in all conditions.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Analysis of deck house height and center of gravity in anti-capsize patrol boat

Taqi,

Trimulyono,

Mursid

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

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Numerical investigations on roll decay of a lifeboat in calm water and waves

Wen,

Shao,

Song

2024

Ocean Engineering

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Design of Anti-Capsize Ship for Patrol Vessel with the Self-Righting Moment

Trimulyono

Fuadi

Zakki

et al. 2023

JMSE

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The patrol boat is one of the critical aspects for archipelago countries, such as Indonesia, to supervise and maintain the sea border. Due to rough sea conditions, the patrol boat could lose its stability due to the loss of a self-righting roll moment in severe waves. One of the most challenging aspects is to ensure the sufficient stability of the patrol boat during rough conditions. Another challenge is to design a boat that has a self-righting moment during rolling in extreme conditions. This paper examines the design of an anti-capsize ship by improving the self-righting moment with different deck houses height. The rough condition is described when the boat experiences a roll angle of 170°. The principal dimensions of the patrol boat, i.e., Lpp, B, H, T, are 13.0 m, 4.2 m, 2.19 m, and 1.15 m, respectively. Four different deck house heights are compared to obtain the best self-righting roll moment with a height increment of 0.1 m. The physical model is implemented with ship model 1:27.4. In addition, computational fluid dynamics (CFD) is also used to support the proof of the existence of the self-righting roll moment. It is revealed that the center of gravity and buoyancy are essential parameters to acquire the self-righting moment. The height of the deckhouse improves the center of the metacenter, which influences the righting arm of ship stability. The results show that our ship design has a self-righting moment during heel at 180°.

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Experimental study of a ship with the self-righting moment in extreme condition

Cited by 3 publications

References 6 publications

Analysis of deck house height and center of gravity in anti-capsize patrol boat

Analysis of deck house height and center of gravity in anti-capsize patrol boat

Numerical investigations on roll decay of a lifeboat in calm water and waves

Design of Anti-Capsize Ship for Patrol Vessel with the Self-Righting Moment

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