The response of a semisubmersible model under focused wave groups: Experimental investigation

Banks, Michael; Abdussamie, Nagi

doi:10.1016/j.joes.2017.07.003

Cited by 22 publications

(14 citation statements)

References 13 publications

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“…where A in , B in , C in, and D in are unknown coefficients; 1,2,3 and 1,2,3 ( ) are the corresponding wave numbers and eigenfunctions for each subdomain, respectively; and a i is the amplitude of the i-th wave component referring to (6). For the velocity potentials of the offshore subdomain Ω 1 , the first item in (11) represents the incident velocity potential, the second denotes the reflected velocity potential, and the infinite series indicate the evanescent modes which only influence the local zone around the structure. For the velocity potentials of the onshore subdomain Ω 3 , the first item in (12) represents the transmitted velocity potential, and the infinite series indicate the evanescent modes that attenuate quickly along the positive x-direction.…”

Section: Analytical Formulamentioning

confidence: 99%

“…For the neighbouring subdomains Ω 1 and Ω 2 , the potential continuity at interface = − can be expressed as follows, by substituting (11) and 12into 10:…”

Section: (18)mentioning

confidence: 99%

“…Examination of Convergence. Shown in (11) to (13), the accuracy and convergence of the solutions are influenced by the truncation order of the evanescent modes in the velocity potentials. The convergence of the analytical solution is investigated by using a limited order of the evanescent modes.…”

Section: (18)mentioning

confidence: 99%

“…Using a constrained interpolation profile-(CIP-) based highorder finite-difference method, Zhao et al [10] calculated floating body motion under a focused wave and compared the measurements with their previous experimental results. Furthermore, the response of a semi-submersible model under a focused wave was experimentally investigated by Banks and Abdussamie [11], in which the focused wave was found to be a reliable method for testing the dynamic response of offshore platforms.…”

Section: Introductionmentioning

confidence: 99%

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Analytical and Experimental Study of Focused Wave Action on a Partially Immersed Box

Fang

Guo

2019

Mathematical Problems in Engineering

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Focused wave is a practical laboratory method for reproducing extreme waves that cause catastrophic damage to marine and coastal structures. This paper presents a simple and efficient analytical method for predicting the hydrodynamic pressure and wave forces acting on a partially immersed box when subjected to a focused wave group attack. The boundary value issue of the physical problem is first investigated to derive an analytical formula based on potential flow theory and the matching eigenfunction method. Thereafter, the test data from a hydrodynamic experiment is used to verify the accuracy of the proposed analytical model. Using the validated analytical model, a parametric analysis is conducted to gain insight into the effects of the structural configuration and wave properties on the pressure and wave forces. It is observed that the hydrodynamic pressure on the offshore side plate, horizontal wave force, and moment are notably influenced by the structure breadth and draft. A focused wave with a lower peak frequency and higher focused amplitude is found to exert greater wave forces on the partially immersed box. The paper shows the value of linear wave theory for wave loads prediction even for focused waves although with some limitations.

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Section: Analytical Formulamentioning

confidence: 99%

“…For the neighbouring subdomains Ω 1 and Ω 2 , the potential continuity at interface = − can be expressed as follows, by substituting (11) and 12into 10:…”

Section: (18)mentioning

confidence: 99%

Section: (18)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analytical and Experimental Study of Focused Wave Action on a Partially Immersed Box

Fang

Guo

2019

Mathematical Problems in Engineering

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“…The effect of water-on-deck during the focused wave acting on a floating body was also discussed [17]. Moreover, the response of a semi-submersible under a freak wave was investigated, taking an experimental [18] and numerical [19] approach. It was concluded that a focused wave can serve as a suitable incident wave to study the behavior of a floating body during a freak wave.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Performance of Submerged Plates During Focused Waves

Fang

Yang

Guo

2019

JMSE

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Submerged horizontal plates are widely employed in research of wave structure interaction as a simplification of coastal and ocean engineering structures. The hydrodynamic performance of submerged horizontal plates under focused waves has been seldom reported. Based on potential flow theory, this paper presents a general solution of the hydrodynamic pressure and wave forces exerted on submerged plates by a focused wave group. An existing experiment and two limiting cases are used to validate the accuracy of the present analytical model. With the validated model, the effect of wave properties and the configuration of the wave structure system on the hydrodynamic performance of submerged plates are investigated. It is found that the hydrodynamic performance of submerged horizontal plates varies with incident focused wave with different peak frequencies. The structural breadth significantly changes the hydrodynamic performance while the structural height has little influence. This paper shows the usefulness of potential flow theory for the preliminary calculation of wave loads on coastal and ocean engineering structures generated by focused waves.

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Dynamic Analysis of a Symmetrically Moored Semisubmersible Under Various Possible Mooring Combinations

Uddin,

Tousif

2024

J. Marine. Sci. Appl.

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The response of a semisubmersible model under focused wave groups: Experimental investigation

Cited by 22 publications

References 13 publications

Analytical and Experimental Study of Focused Wave Action on a Partially Immersed Box

Analytical and Experimental Study of Focused Wave Action on a Partially Immersed Box

Hydrodynamic Performance of Submerged Plates During Focused Waves

Dynamic Analysis of a Symmetrically Moored Semisubmersible Under Various Possible Mooring Combinations

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