Time Domain Simulation of Symmetric Ship Motions In Waves

Ballard, E.J.; Hudson, Dominic A.; Price, W.G.; Temarel, P.

doi:10.3940/rina.ijme.2003.a2.22031

Cited by 12 publications

(22 citation statements)

References 3 publications

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“…Bishop and Price 1979, Inglis and Price, 1981, Bailey et al, 2002aand Ballard et al, 2003and Mortola et al, 2011a. • 40 strips of equal length Table 2.…”

Section: Methodsmentioning

confidence: 99%

“…The numerical model originates from the work of Bailey et al (2002aBailey et al ( , 2002b and Ballard et al (2003). The ship is considered to be a rigid body that is allowed parasitic motion or responses to wave disturbances in way of six degrees of freedom.…”

Section: Three Dimensional Weakly Nonlinear Hydrodynamic Analysismentioning

confidence: 99%

“…Although the method is capable of 6 degrees of freedom, only 2 degrees of freedom (''namely'' heave -w and pitch -q) heave been used in the current predictions, allowing parity with the other methods used. The method is discussed in detail by Ballard et al (2003); hence, only a short summary is provided here.…”

Section: Three Dimensional Weakly Nonlinear Hydrodynamic Analysismentioning

confidence: 99%

“…Accordingly, the purpose of this paper is to systematically examine where linear and weakly nonlinear hydrodynamic methods fit within the range of taxonomy of fluid structure interaction methods and to assess the influence of nonlinearity on the ship motions and wave loads of a typical 10,000 TEU modern container ship. Different numerical methods ''namely'' (a) three-dimensional linear frequency domain hydrodynamic -3D LINEAR (Inglis and Price, 1981), (b) two dimensional linear hydroelastic -2D HYEL, (Bishop and Price, 1979), (c) two-dimensional large amplitude hydrodynamic -2D LAMP (Mortola et al, 2011a,b), and (d) three-dimensional body nonlinear hydrodynamic -3D PNL (Bailey et al, 2002a andBallard et al, 2003) are assessed and compared against available experimental results from the WILS II joint industry project (Hong et al, 2010 andLee et al, 2012). This paper focuses on assessing the accuracy of numerical results when using methods with increasing sophistication in approximating nonlinear effects and their importance in predicting motions and loads.…”

Section: Introductionmentioning

confidence: 99%

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The influence of nonlinearities on the symmetric hydrodynamic response of a 10,000 TEU Container ship

Hirdaris

Lee

Mortola³

et al. 2016

Ocean Engineering

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The prediction of wave-induced motions and loads is of great importance for the design of marine structures. Linear potential flow hydrodynamic models are already used in different parts of the ship design development and appraisal process. However, the industry demands for design innovation and the possibilities offered by modern technology imply the need to also understand the modelling assumptions and associated influences of nonlinear hydrodynamic actions on ship response. At first instance, this paper presents the taxonomy of fluid structure interaction methods of increasing level of sophistication that may be used for the assessment of ship motions and loads. Consequently, it documents in a practical way the effects of weakly nonlinear hydrodynamics on the symmetric wave-induced responses for a 10,000 TEU Container ship. It is shown that weakly nonlinear fluid structure interaction models may be useful for the prediction of symmetric waveinduced loads and responses of such ship not only in way of amidships but also at the extremities of the hull. It is concluded that validation of hydrodynamic radiation and diffraction forces and their respective influence on ship response should be especially considered for those cases where the variations of the hull wetted surface in time may be noticeable.

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“…Bishop and Price 1979, Inglis and Price, 1981, Bailey et al, 2002aand Ballard et al, 2003and Mortola et al, 2011a. • 40 strips of equal length Table 2.…”

Section: Methodsmentioning

confidence: 99%

Section: Three Dimensional Weakly Nonlinear Hydrodynamic Analysismentioning

confidence: 99%

Section: Three Dimensional Weakly Nonlinear Hydrodynamic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of nonlinearities on the symmetric hydrodynamic response of a 10,000 TEU Container ship

Hirdaris

Lee

Mortola³

et al. 2016

Ocean Engineering

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show abstract

“…Similarly, the diffraction forces/moments contribution can also be represented using convolution integrals [17]. The wave diffraction impulse response function can be expressed as:…”

Section: Diffraction Forces and Momentsmentioning

confidence: 99%

Numerical Modelling and Study of Parametric Rolling for C11 Containership in Regular Head Seas Using Consistent Strip Theory

Wang

et al. 2017

Brod

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SummaryIn this paper, a numerical model was proposed to simulate the parametric rolling of ships in head seas. The method was developed in time-domain based on strip theory, in which a consistent way of estimating the radiation forces was applied using impulse response function method. To take the coupling effect into account, the heave and pitch motions were solved together with the rolling motion. Also, the Froude-Krylov forces and hydrostatic forces were evaluated on the instantaneously wetted surface of the ship, in order to model the time varied restoring rolling moment in waves. Based on the developed numerical model, the parametrically roll motions of C11 containership was simulated. The influence of roll damping was investigated using two different methods, and the numerical results were compared with model tests. The comparative study shows that results obtained by the proposed method generally agree well with experimental data. Discussions and possible improvements of the current numerical model were also presented in this paper, with regard to the numerical deviation between the numerical and experimental results when the wave steepness was larger than 0.04.

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