Experimental investigation on the influence of interceptor plate on the motion performance of a cylindrical FPSO

Amin, Islam; Dai, Saishuai; Day, Sandy; Oterkus, Selda; Öterkuş, Erkan

doi:10.1016/j.oceaneng.2021.110339

Cited by 10 publications

(3 citation statements)

References 19 publications

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“…Further, it is reported that the control strategy is most effective when the tuning of the passive device is to the dominant frequency of wave excitation, and not to the structural frequency, which follows from the principle of the dynamic vibration absorber and the fact that the forcing and structural frequencies are well-separated from each other. Apart from the conventional ship-shaped FPSOs, there have been studies to reduce the heave motions of cylindrical FPSOs, by means of a heaveplate, which is an external appendage plate surrounding the base of the main hull of the FPSO (Amin et al, 2022; Sathia and Vijayalakshmi, 2020; Subbulakshmi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Wave-induced vibration control of Floating production storage and offloading systems by tuned mass damper inerter

Sarkar,

Chakraborty,

Ghosh

2024

Advances in Structural Engineering

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Floating production storage and offloading systems (FPSOs) are gaining prominence in the offshore industry. FPSOs are generally designed to weathervane, necessitating surge vibration control for station keeping. Since the natural period of surge vibration is far higher than the dominant period of the input wave load, instead of supplemental damping, a high inertial device, such as the tuned mass damper inerter (TMDI), would be effective. This concept has hitherto not been investigated for the FPSO. A frequency domain formulation of the FPSO-TMDI system under wave force, considering interaction of the liquid cargo is presented. Utilizing Froude-Krylov theory, suitably modified to account for diffraction effects, wave force on the FPSO is obtained using field data from North Sea. TMDI parameters are optimized using Genetic Algorithm under different tank-fill conditions. The results demonstrate that the TMDI holds potential in providing an effective and robust performance in controlling the surge motion of FPSOs.

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Section: Introductionmentioning

confidence: 99%

Wave-induced vibration control of Floating production storage and offloading systems by tuned mass damper inerter

Sarkar,

Chakraborty,

Ghosh

2024

Advances in Structural Engineering

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“…Another possible solution to improve hydrodynamic performance is to design newtype floating structures. There are different kinds of non-ship-type FPSOs proposed, such as cylindrical bodies [8,9], multicylinder bodies [10], sandglass-type bodies [11,12], deep-draft multicolumn bodies [13,14], fillet inverted quadrangular frustum pyramid bodies [15,16], and so on. According to both numerical and experimental tests, their robust hydrodynamic performance is shown, especially the feature of insensitivity to the incident wave direction.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Responses of the Cylindrical Floating Drilling Production Storage and Offloading System with Annular Anti-Motion Structures under the Survival Sea Scenario

Zhao

et al. 2023

JMSE

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At present, dry wellheads are usually adopted on small-storage TLP and SPAR platforms to develop offshore oil and gas because of the robust hydrodynamic performance under severe-wind seas. On the other hand, FPSO and FDPSO platforms that have a larger storage capacity can hardly use this cost-saving facility due to their relatively poor vertical motion performance. Cylindrical FPSOs are proposed to improve the heave performance of ship-type FPSOs, but their behaviors are still too large to adopt the dry wellheads. In the present work, a cylindrical FDPSO platform is proposed based on the FWPSO platform, adding an extension cylinder and a new damping structure at the bottom. Their hydrodynamic performances are calculated by the potential theory and compared in the frequency domain. Taking two particular mooring systems, including both catenary and ‘chain-polyester-chain’ types, and the survival sea scenario in the South China Sea into account, a time-domain coupling analysis was adopted to simulate the dynamic performance of the platform-mooring system. The feasibility of dry wellhead adoption on the FDPSO is discussed by investigating the platform motion and the mooring tension. The results show that the FCDS platform with the ‘chain-polyester-chain’-type mooring system can meet the motion response requirements, and the mooring system can also meet the requirements of the specification.

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“…damping and yet are perfectly suited to FPSOs or mono column structures [9], [24], [25], [26], [27], All of them are hardly possible to reduce the massive heave motion insufficiently.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Characteristics of Pitch Motion for a Novel SPAR–type FOWT in Regular Waves

Assidiq

Paroka

Palippui

et al. 2023

Kapal

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Pitching mode is more crucial than heaving mode in assessing floating offshore wind turbine (FOWT) motion characteristics, especially the operation of the SPAR substructure. The aim of this paper is to develop an experimental method for improving the SPAR substructure to minimize unnecessary pitch motion. Toward this end, three vertical plate configurations based on the novel SPAR are being developed, known as the 3VP, 4VP, and 5VP models. In consideration of 0⁰, 30⁰, 60⁰, 90⁰-incidence, the pitch response characteristics of the proposed novel SPAR models are comprehensively evaluated in terms of submerged volume ratio, wave-induced motion, non-dimensional damping coefficient, and percentage of motion reduction. The model test results indicate that the 4VP model outperforms the other novel models with respect to dynamic response, particularly the incidence of 0⁰ and 90⁰. This study implies that the novel SPAR development is both feasible and effective in the modification of SPAR-type FOWT substructures.

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Experimental investigation on the influence of interceptor plate on the motion performance of a cylindrical FPSO

Cited by 10 publications

References 19 publications

Wave-induced vibration control of Floating production storage and offloading systems by tuned mass damper inerter

Wave-induced vibration control of Floating production storage and offloading systems by tuned mass damper inerter

Dynamic Responses of the Cylindrical Floating Drilling Production Storage and Offloading System with Annular Anti-Motion Structures under the Survival Sea Scenario

Experimental Investigation on the Characteristics of Pitch Motion for a Novel SPAR–type FOWT in Regular Waves

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