Dragged surge motion of tension leg platforms and strained elastic tethers

Lee, Hsien Hua; Wang, Pei‐Wen; Lee, Chung-Pan

doi:10.1016/s0029-8018(98)00012-2

Cited by 15 publications

(6 citation statements)

References 11 publications

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“…The wave force acting on the tension leg was calculated by a linearized Morison equation, and an analytic solution was proposed for the entire interacted problem. Lee et al [14] applied the interaction methodology of large and small structures, extending to tethered mooring tension leg floating structures. Lee and Wang [15] extended the same technique to problems of tension leg platforms with net cages.…”

Section: Introductionmentioning

confidence: 99%

Mooring Drag Effects in Interaction Problems of Waves and Moored Underwater Floating Structures

Chen

Lee

2020

JMSE

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In contrast to either considering structures with full degrees of freedom but with wave force on mooring lines neglected or with wave scattering and radiation neglected, in this paper, a new analytic solution is presented for wave interaction with moored structures of full degrees of freedom and with wave forces acting on mooring lines considered. The linear potential wave theory is applied to solve the wave problem. The wave fields are expressed as superposition of scattering and radiation waves. Wave forces acting on the mooring lines are calculated using the Morison equation with relative motions. A coupling formulation among water waves, underwater floating structure, and mooring lines are presented. The principle of energy conservation, as well as numerical results, are used to verify the present solution. With complete considerations of interactions among waves and moored structures, the characteristics of motions of the structure, the wave fields, and the wave forces acting on the mooring lines are investigated.

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Section: Introductionmentioning

confidence: 99%

Mooring Drag Effects in Interaction Problems of Waves and Moored Underwater Floating Structures

Chen

Lee

2020

JMSE

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“…prope y and the mechanicaI behavior of the tether were both taken into accounts. Based on the previous studies (Lee & Lee 1993Lee et al 19971999Wang & Lee 1998and Lee & Wang 1999 firstly the equations for the scattering problem and the radiation problem were established at the related boundaries with variables of velocity potential obtained from the Laplace equation. Then the forcing function related to the aforementioned velocity potentials was used in the equation of motion for the platform and the net-cages Combined all of these equations together the unknown industry.…”

Section: Introductionmentioning

confidence: 99%

“…Many fish farming cage systems were proposed (Hurtadoponce 1992Edward et al 1988Yamamoto et al 1988 (Fu et al 1989Fujita et al 1991 and theories (Lee et al 1997(Lee et al 1999 since late 80s. The results showed that the major concern on the shfarming net-cage system is the mooring force and the dynamic motion and the deformation (deflection) for the tether and the net-cage.…”

Section: Introductionmentioning

confidence: 99%

The Dragged Surge Motion of Tension-Leg Type Fish Cage System Subjected to Multi-Interactions Among Wave and Structures

Lee

Wang

2005

IEEE J. Oceanic Eng.

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In this study a typical tension-Ieg type net cage system is presented and a set of equations of motion for the cage system of simplified two-dimensional case are derived. Subsequently a close form solution is obtained when the wave-structure interaction between the top buoyant structure and the incident wave and the drag motion of the tether and net are both considered. The p ameter of solidity as a ratio of the twine diameter and the mesh size of the cage is also taken into account in the analysis. The purpose of this study is to investigate the surge motion for the tension-Ieg type cage system when subjected to incident waves and tlow drags on the net-cages and furthermore to compare the cage behavior with the case when the net-cage drag is not considered. Numerical examples are carried out and the results discussed focusing on the cage motion when subjected tonetcage drags in the waves of a range of periods. It is found that there is significant intluence of net~cage drag on the surge motion of the net-cage system. Under various parameters such as the material property twine diameter mesh size and the draft of the collar structure the surge motion of the netcage system were also studied and the behavior is generally similar to the case without drageffect.

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“…In that study, a linear pro"le along the water depth was assumed for the tension leg tethers and then without solving the tether motion the drag force was integrated along the tether. Lee et al [9] tried to "nd the drag motion of the tethers when the interactions between wave and platform were considered. In that study, however, only surge motion was considered for the platform and the drag tether motion was obtained separately after the motion of the platform was realized.…”

Section: Introductionmentioning

confidence: 99%

“…The equation of the motion and the corresponding solution for both the platform and the tethers of the tension leg platform system subjected to #ow-induced drag motion were derived and solved. Based on previous studied [5,9] the equations for the scattering problem and the radiation problem were established on the boundaries in terms of the velocity potentials. These equations were combined into the equation of motion for the tether and the equation for the platform motion and then solved simultaneously to obtain the #ow "eld, platform responses and the tether motion.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution on the Dragged Surge Vibration of Tension Leg Platforms (Tlps) With Wave Large Body and Small Body Multi-Interactions

Lee¹,

Wang²

2001

Journal of Sound and Vibration

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Dragged surge motion of tension leg platforms and strained elastic tethers

Cited by 15 publications

References 11 publications

Mooring Drag Effects in Interaction Problems of Waves and Moored Underwater Floating Structures

Mooring Drag Effects in Interaction Problems of Waves and Moored Underwater Floating Structures

The Dragged Surge Motion of Tension-Leg Type Fish Cage System Subjected to Multi-Interactions Among Wave and Structures

Analytical Solution on the Dragged Surge Vibration of Tension Leg Platforms (Tlps) With Wave Large Body and Small Body Multi-Interactions

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