A proposed new generation of intact stability criteria for assessment of ship stability in longitudinal waves

Andrei, C.

doi:10.1088/1757-899x/227/1/012005

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…It increases or decreases the height of center gravity to the metacenter (GM) and lever righting stability (GZ). The effect of wave crest and wave trough on righting arm stability (GZ) is formulated as follows [12]:…”

Section: Effect Of Wave On Stabilitymentioning

confidence: 99%

Stability Assessments of RoPax Open Car Deck on Longitudinal Wave

Hasanudin¹,

Zubaydi²,

Aryawan³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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This paper discusses RoPax Open Car Deck (OCD) without side casings (wing tanks) on longitudinal wave water. The purpose is to know the critical intact stability of RoPax OCD on the longitudinal wave so that the other ship can avoid the condition. A case study takes a RoPax OCD, which capsized on Halmahera seawater. The stability calculation uses the energy balance method on calm water and longitudinal waves with various amplitude, phases, and lengths of waves. Survival stability assessments use the lever righting arm (GZ) of intact stability criteria IMO (IS Code 2008). Results show RoPax OCD full load on calm water has failed to fulfil several of the stability criteria of IS Code 2008, especially on area 30°-40° of GZ curve 1.221 meter-degree ≤ 1.7189 meter-degree, and GZ maximum 15° ≤ 25°. Hogging and sagging waves reduce the GZ height compared to calm water, but the length of the GZ range on calm water increases 0°~29° increase becomes 0°~32° on the sagging wave and decreases 0°~13° on the hogging wave. With varying wave phases 0-0.8, the highest GZ curve occurs in phase 0.2, and the lowest GZ curve occurs in phase 0.6. With varying wavelength, 10-50 meter, shows highest GZ curve occur on wavelength 10 m, and the lowest GZ curve occurs on wavelength 40 m, the same as the ship length (Lpp). All GZ stability curves have positive values, but the longitudinal wave reduces the GZ heigh and causes the water to ingress onto the car deck. Hence, the effect on the water-free surface influences ship capsizes. The authors suggest that RoPax with opened car deck without side casings should not be operated in the open sea or the strait bordered by the open sea to avoid the same accident.

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Section: Effect Of Wave On Stabilitymentioning

confidence: 99%

Stability Assessments of RoPax Open Car Deck on Longitudinal Wave

Hasanudin¹,

Zubaydi²,

Aryawan³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Bulian and Francescutto [18] proposed the second-generation intact stability criteria for pure loss of stability and broaching-to. The estimation methodology of the parametric rolling and pure loss in longitudinal waves was introduced [19][20][21]. Hasanudin and Chen [22] stated the limitation of the IMO intact stability regulations which was only applicable to ships navigating on a calm sea.…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Simply Evaluating the Safety of a Passenger Ship Stability Using the Index for the Intact Stability Appraisal Module

Woo

2022

Sensors

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To evaluate the safety of passenger ships’ stability, ten stability parameters should be calculated. However, since the process for calculating all stability parameters is complex without a ship loading program, a convenient methodology to simply calculate them and evaluate the safety condition of a passenger ship is required to alert the hazard to a captain, officer, and crew. The Index for Passenger Ship Intact Stability Appraisal Module (IPSAM) is proposed herein. According to the value of a passenger ship’s metacentric height (GM) which could be calculated by the ship’s roll period measured by sensors in real-time, IPSAM simply calculates nine intact stability parameters except for AnglemaxGZ and proposes the present stability status as a Single Intact Stability Index (SISI). It helps crews easily recognize the safety of passenger ships’ stability as a decision support system in real-time. Based on the intact stability parameters of 331 loading conditions of 11 passenger ships, empirical formulas for IPSAM were derived. To verify the empirical formulas of IPSAM, the stability parameters of a passenger ship in 20 loading conditions were calculated using proposed empirical formulas and the principal calculation methods respectively, then compared. Additionally, the result of the SISI of 20 loading conditions successfully indicates the danger as the value of the SISI under 1.0 of the three loading conditions that do not satisfy the IMO intact stability requirements.

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“…To develop the so-called "second-generation stability criteria" [8][9][10][11], different working groups have been established. In light of this fact, only limited results are available from the related research projects [12,13] and the Wolfson Unit of the University of Southampton, UK [14,15].…”

Section: Introductionmentioning

confidence: 99%

A New Design Criterion to Improve the Intact Stability of Galician Small Fishing Vessels

Alvite-Castro

Orosa

Vergara

et al. 2020

JMSE

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The first technical factor involved in maritime accidents is related to the lack of intact stability. The current stability criterion, based on fixing a minimum value for each of the different static and dynamic righting arms, is not regarded as satisfactory. Correspondingly, a new criterion based on the transverse metacentric height, dynamic stability up to 70° heel, and critical wave height were considered for fishing vessels less than or equal to 24 m in length. This can be understood as an improvement on the Rahola criterion or an equivalent criterion of dead ship capsize mode, as assumed in the second-generation stability criteria. The proposed criterion, when used in a real case study on the Galician fishing grounds, achieved higher precision. The few vessels that did not comply with the proposed requirement can continue to operate in the area if the Meteorological and Oceanographic Coefficient (CMO) is considered at the time we employ our criteria. As a result, their activity is limited to only a few fishing grounds where adequate weather conditions exist. Finally, the methodology developed can be easily extrapolated to other regions in the world.

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A proposed new generation of intact stability criteria for assessment of ship stability in longitudinal waves

Cited by 4 publications

References 3 publications

Stability Assessments of RoPax Open Car Deck on Longitudinal Wave

Stability Assessments of RoPax Open Car Deck on Longitudinal Wave

A Methodology for Simply Evaluating the Safety of a Passenger Ship Stability Using the Index for the Intact Stability Appraisal Module

A New Design Criterion to Improve the Intact Stability of Galician Small Fishing Vessels

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