Performance-based assessment of steel jacket platforms by wave endurance time method

Jahanmard, Vahidreza; Diznab, Mohammad Ali Dastan; Mehdigholi, Hamid; Tabeshpour, Mohammad Reza; Seif, Mohammad Saeed

doi:10.1080/17445302.2015.1099245

Cited by 11 publications

(1 citation statement)

References 14 publications

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“…In the present study, the FPSO is a ship-shaped moored vessel, and is subjected to regular waves in deep sea conditions. According to DNV (DNV-RP-F205, 2010), the natural period of surge motion of ship-shaped FPSOs is more than 100s, which is far higher than the period of the input wave force for different sea state conditions (Jahanmard et al, 2013). Thus, in such a scenario, the dynamic response of the structure cannot be reduced by an increase in damping alone, rather a high inertia is required for the purpose.…”

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%