Estimation of broaching probability using wave-induced forces and moments measured in captive model tests

Htet, Thet Zaw; Umeda, Naoya; Maki, Atsuo; Matsuda, Akihiko; Terada, Daisuke

doi:10.1007/s00773-017-0507-1

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…The broaching prediction of irregular waves based on the method in this paper could be discussed at STABS2024, which will be held by CSSRC in 2024. The measured wave-induced forces and moments could be more significant than those in simulations [13].…”

Section: Introductionmentioning

confidence: 74%

“…The frequency-domain amplitude and phase pitch motions are calculated by the EStrip_STF method at several constant s an interpolation method is used to consider the time-varied forward speed The yaw amplitude by potential theory is generally smaller than that by te in Figure 5. The reference [13] reported that the measured wave-induced y could be more significant than those in simulations. The wave-induced yaw crucial for predicting broaching, and the theory of calculating wave-indu ments should be further studied.…”

Section: Validation Of the Seakeeping Motionsmentioning

confidence: 99%

“…The yaw amplitude by potential theory is generally smaller than that by tests, as shown in Figure 5. The reference [13] reported that the measured wave-induced yaw moments could be more significant than those in simulations. The wave-induced yaw moments are crucial for predicting broaching, and the theory of calculating wave-induced yaw moments should be further studied.…”

Section: Validation Of the Seakeeping Motionsmentioning

confidence: 99%

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A Unified Numerical Method for Broaching and Loss of Stability in Astern Seas

Boulougouris

2023

JMSE

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The interim guidelines of second-generation intact stability criteria and their explanatory note were issued by the IMO in 2022. However, due to their complexity, the direct stability assessments of broaching and loss of stability still need to be made easier for users. Therefore, the mathematical models for broaching and loss of stability in astern seas are studied in this paper. Firstly, a time-domain 6 DOF numerical model is adopted, combining seakeeping and maneuvering mathematical models. Secondly, the hydrodynamic forces, heave, and pitch motions are obtained by an enhanced strip method with the upright hull at different speeds in the frequency domain. Then, their time-domain values are transferred from their frequency-domain values with the speed variation considered. Thirdly, the time-domain varied wet hull in waves is captured by the 6 DOF ship motion. Then, the Froude–Krylov and the hydrostatic forces in the surging, swaying, rolling, and yawing directions are simulated considering the wave pressure around the wet hull. Fourthly, the exposure of the twin rudders and the wave-particle velocity are considered for predicting broaching. Finally, the calculated results are compared with the published results. The results show that the time-domain 6 DOF coupled numerical model can be unified for predicting broaching and loss of stability in the astern seas.

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Section: Introductionmentioning

confidence: 74%

Section: Validation Of the Seakeeping Motionsmentioning

confidence: 99%

Section: Validation Of the Seakeeping Motionsmentioning

confidence: 99%

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