Comparative analysis of closed-form expressions and other commonly used seakeeping methods

Petranović, Tamara; Mikulić, Antonio; Gledić, Ivana; Parunov, Joško

doi:10.1016/j.oceaneng.2023.114977

Cited by 2 publications

(3 citation statements)

References 18 publications

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“…The Frequency Independent Model Error (FIME) of VWBM calculated by CFE was determined by the regression equation proposed in [25]. It was found to be 1.19 for test oil tankers from Table 2.…”

Section: Results Of the Regression Analysis Are Presented In Tablementioning

confidence: 99%

“…It was found to be 1.19 for test oil tankers from Table 2. The regression equation developed in [25] was based on the extensive comparison of CFE with experiments and other commonly used seakeeping methods. Using data from that same study, FIME for the 3D panel method was found to be 0.98 using corresponding regression coefficients.…”

Section: Results Of the Regression Analysis Are Presented In Tablementioning

confidence: 99%

“…CFE is particularly suitable for seakeeping predictions in conceptual design, enabling rapid sensitivity analysis of the concept ship in regards to the operating profile and the wave scatter diagram [24]. The precision and accuracy of CFE are lower than those of other commonly used seakeeping tools (such as the strip theory and the 3D panel method), but it is still acceptable, especially for ships sailing with low speed in head seas [25].…”

Section: Uncertainty In the Vertical Wave Bending Momentmentioning

confidence: 99%

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Consequences of the Improved Wave Statistics on a Hull Girder Reliability of Double Hull Oil Tankers

Parunov,

Mikulić,

Ćorak

2024

JMSE

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This paper investigates the change in hull girder failure probabilities and partial safety factors caused by the implementation of the new procedure for direct computation of wave loads recommended by the International Association of Classification Societies (IACS). Differences between new and previous procedures are primarily related to the different associated scatter diagrams, and secondarily due to the assumptions on wave spectrum, wave energy spreading, and ship speed. This study performs a comparative structural reliability analysis of the global longitudinal bending of five oil tankers of different sizes between two procedures for wave load computation. Firstly, failure probabilities are compared, and secondly, modified partial safety factors are proposed, resulting in similar failure probabilities according to two separate procedures. It is found that implementation of the new revision of the IACS procedure for direct computation of wave loads results in a reduction of the minimum required ultimate vertical bending capacity of a ship hull by 10%. In addition to the novel investigation of the safety of oil tankers using a revised wave scatter diagram, this study offers a new rapid method for calculation of extreme vertical wave bending moments based on the regression of the parameters of the Weibull function, used for the long-term probability distribution of wave-induced loads.

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Section: Results Of the Regression Analysis Are Presented In Tablementioning

confidence: 99%

Section: Results Of the Regression Analysis Are Presented In Tablementioning

confidence: 99%

Section: Uncertainty In the Vertical Wave Bending Momentmentioning

confidence: 99%

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Consequences of the Improved Wave Statistics on a Hull Girder Reliability of Double Hull Oil Tankers

Parunov,

Mikulić,

Ćorak

2024

JMSE

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Benchmark on the prediction of whipping response of a warship model in regular waves

Parunov,

Badalotti,

Feng

et al. 2024

Marine Structures

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Comparative analysis of closed-form expressions and other commonly used seakeeping methods

Cited by 2 publications

References 18 publications

Consequences of the Improved Wave Statistics on a Hull Girder Reliability of Double Hull Oil Tankers

Consequences of the Improved Wave Statistics on a Hull Girder Reliability of Double Hull Oil Tankers

Benchmark on the prediction of whipping response of a warship model in regular waves

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