Hydrodynamic Interaction of Floating Structure in Regular Waves

Abyn, Hassan; Maimun, Adi; Jaswar, Jaswar; Islam, Mohammad Rafiqul; Magee, Allan; Bodaghi, Behnam; Pauzi, Mohamad; Siow, C. L.; Tofa, M. Mobassher

doi:10.11113/jt.v66.2491

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…An alternative option would be to use a very small 1:200th scale model without truncation, but this would impose significant scale effects (Re<10,000) which could change the vortex shedding pattern around the body and unduly affect the results. For bluff bodies at Re>10,000, the vortex shedding is mostly independent of Reynolds number since the flow separates close to the column corners at both model scale and full scale [15]. The Strouhal number (St) is associated with the vortex shedding frequency and is a function of Re.…”

Section: Inclining Testmentioning

confidence: 99%

Experimental Study of Motions of Two Floating Offshore Structures in Waves

Abyn

Islam

Maimun³

et al. 2016

brod

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SummaryDrilling is carried out in deeper to deeper waters around the globe to meet growing demands for oil and natural gas, and a number of multi body structures are deployed in various oil fields in the world. Investigation of hydrodynamic interaction of offshore structures is therefore worthwhile. Hydrodynamic interaction between floating offshore structures affects motion and relative motion especially during loading and offloading operations. Hydrodynamic interactions may lead to large motions of floating bodies that would cause damage to moorings and offloading systems and may collide with each other. This research work discusses experimental results of hydrodynamic interaction in surge, heave and pitch motion, relative motion and relative distance between a Tension Leg Platform (TLP) and semi-submersible (Tender Assisted Drilling) in regular waves. The experiment is conducted without tendon because of the depth limitation of the Towing Tank. However, in order to consider the contribution of mooring in linear direction, appropriate stiffness of horizontal springs have been used. The experiment was conducted for a full scale wave height of 3.77 m to 12.49 m for a separation distance of 21.7 m.From the analyses of the experimental and numerical results, it can be concluded that nonlinearity of the wave has an important effect on increasing the motion especially in the natural frequency region. Finally, a number of recommendations have been made for further study.

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Section: Inclining Testmentioning

confidence: 99%

Experimental Study of Motions of Two Floating Offshore Structures in Waves

Abyn

Islam

Maimun³

et al. 2016

brod

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“…The ratio of model scale to full scale is 1:70 as mentioned in the earlier part. The motion experiment is carried out at Towing Tank belong to Marine Technology Center, UTM with the wavelength from 1 meter to 9.4 meters [12,17]. As shown in Figure 3 to Figure 5, the tendency of surge, pitch and heave motion response obtained by diffraction potential theory, Hydrostar software and experimental method is agreed between each other.…”

Section: 60 Results and Discussionmentioning

confidence: 69%

“…In addition, few experimental tests were carried out to obtain the motion response of structures. A model test related to interaction between semi-submersible and TLP was carried out by Hassan Abyn et al [12]. In continuing Hassan Abyn et al also tried to simulate the motion of a semi-submersible by using HydroSTAR and then analysed the effect of meshing number to the accuracy of execution result and execution time [13].…”

Section: 20 Literature Reviewsmentioning

confidence: 99%

Prediction of Semi-Submersible’s Motion Response by Using Diffraction Potential Theory and Heave Viscous Damping Correction

Siow

Koto²,

Abby

et al. 2014

Jurnal Teknologi

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This paper proposes a three dimensional diffraction potential theory with heave viscous damping correction to predict motion response of multiple hulls semi-submersible structure. The heave viscous damping correction was applied in this paper to avoid the execution return an infinity value for heave motion when the heave motion is dominated by damping term. On previous stage, this method was shown it capability to apply on single hull structure. However, some modification is required to able the single hull diffraction potential theory applied to multiple hull structure. Upon this stage, the modification was made into the meshing system in purposes to able the numerical coding calculate the response of semi-submersible structure. This paper also presented the comparison between the result calculate by diffraction potential theory, commercial software-Hydrostar and experiment result in the selected semi-submersible model. In the comparison, it is obtained that the tendency between the numerical results and the experimental result is agreed between each other.

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Experimental and Numerical Study on the Characteristics of Motion and Load for a Floating Solar Power Farm under Regular Waves

Lee

Paik

Lee

et al. 2022

JMSE

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Recently, the demand for floating solar power farms in lakes and coasts (rather than on land) has been increasing rapidly. It is important to develop a numerical analysis technique that considers environmental conditions to predict structural stability and accurate motion response while designing a floating solar power farm. In this study, we performed a comparison under conditions similar to those of the Inha University towing tank (IUTT) model test to verify the numerical analysis method. The results revealed that heave and pitch movements were dominant under head sea conditions. Relative behavior occurred because of the hinge connection of each unit, and complex motion characteristics appeared depending on the wave conditions. The numerical method was verified based on the motion response and load of the floating solar farm. The validity of the results was also confirmed.

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Hydrodynamic Interaction of Floating Structure in Regular Waves

Cited by 3 publications

References 7 publications

Experimental Study of Motions of Two Floating Offshore Structures in Waves

Experimental Study of Motions of Two Floating Offshore Structures in Waves

Prediction of Semi-Submersible’s Motion Response by Using Diffraction Potential Theory and Heave Viscous Damping Correction

Experimental and Numerical Study on the Characteristics of Motion and Load for a Floating Solar Power Farm under Regular Waves

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