Numerical prediction of parametric roll in oblique waves

Umeda, Naoya; Sakai, Masahiro; Fujita, Noboru; Morimoto, Ayumi; Terada, Daisuke; Matsuda, Akihiko

doi:10.1016/j.oceaneng.2016.05.014

Cited by 13 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To validate the above methods, we used existing results from towing-model experiments with a C11-class postPanamax container ship [21] and free-running model experiments with an ITTC A-1 container ship [22] and the ONR Flare topside vessel [23], of which the experimental procedure was based on the ITTC recommended procedures for intact stability model tests, 7.5-02-07-04.1. The principal particulars are listed in Table 1, and the wave and running conditions of the experiments are listed in Tables 2, 3, and 4.…”

Section: Methodsmentioning

confidence: 99%

Averaging methods for estimating parametric roll in longitudinal and oblique waves

et al. 2017

Self Cite

View full text Add to dashboard Cite

The International Maritime Organization is still developing second generation intact stability criteria for the roll motion of ships. For level 2 vulnerability criteria for parametric roll that require no expert knowledge about nonlinear dynamics, various analytical approaches are proposed in this study based on averaging methods. Firstly, an averaging method is applied to an uncoupled roll equation without fitting a polynomial to the calm-water GZ curve, thereby taking into account more accurate effect of the restoring arm. Secondly, the parametric roll amplitude is estimated more accurately using an averaging method that takes into account the effect of superharmonic roll motion. Thirdly, the critical speed for parametric roll is estimated, which is expected to reduce calculation processes in the design stage. Fourthly, the averaging method is extended to parametric roll in oblique waves, thereby taking into account the effect of both the ship's speed and course, which are helpful for an operational decision. Finally, the proposed analytical approaches are verified against an existing averaging method, numerical simulations, and free-running model experiments.

show abstract

Section: Methodsmentioning

confidence: 99%

Averaging methods for estimating parametric roll in longitudinal and oblique waves

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Mazarakos et al (2015) investigate the dynamics of a TLP platform supporting three oscillating water column (OWC) devices and a wind energy turbine using frequency and time domain numerical models. Umeda et al (2016a) address the occurrence of "false negatives" in the application of Level 2 of pure loss SGISC to offshore supply vessels (OSV), through model tests and numerical simulations (Figure 17). The river-sea ships are inland vessels suitable for restricted navigation at sea.…”

Section: Other Ship Typesmentioning

confidence: 99%

“…Free-running model experiment of the OSV in astern quartering waves. Adapted fromUmeda et al (2016a).…”

mentioning

confidence: 99%

An overview of the current research on stability of ships and ocean vehicles: The STAB2018 perspective

et al. 2019

Self Cite

View full text Add to dashboard Cite

The paper provides an insight into contemporary research on ship stability and identifies the possible directions for future research by reviewing a selection of papers published in STAB2015, ISSW2016 & 2017. These works have been organized in different sections, according to the main thematic areas of research, covering intact and damage stability, regulatory issues including probabilistic approaches, advanced numerical methods for ship motion and stability failure prediction including roll damping, operational issues related to ship stability and environmental modelling. Furthermore, the educational potential of STAB/ISSW is exemplified. This review paper is a joint effort within the SRDC (Stability R&D Committee).

show abstract

“…Both broaching and loss of stability are related to the maneuvering force, the rudder force, the seakeeping force, the roll-restoring force, the thrust force, and the resistance. This paper intends to establish a unified numerical method in which the body's exact FK force and the hydrostatic force are based on an existing plan for parametric rolling prediction [27][28][29], and maneuvering motions, such as sway and yaw, are considered. In addition, the rudder exposure and the wave-particle velocity are considered for predicting broaching.…”

Section: Introductionmentioning

confidence: 99%

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

Boulougouris

2023

JMSE

View full text Add to dashboard Cite

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.

show abstract

Numerical prediction of parametric roll in oblique waves

Cited by 13 publications

References 1 publication

Averaging methods for estimating parametric roll in longitudinal and oblique waves

Averaging methods for estimating parametric roll in longitudinal and oblique waves

An overview of the current research on stability of ships and ocean vehicles: The STAB2018 perspective

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

Contact Info

Product

Resources

About