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Author Graylee, Adeleh
Affiliation Babol Noshirvani University of Technology
E-mail a.graylee1365@gmail.com
Author Yousefifard, Mahdi
Affiliation Babol Noshirvani University of Technology
E-mail yousefifard@nit.ac.ir
ISSN printed 1733-8670
URI https://repository.am.szczecin.pl/handle/123456789/2652
Abstract This paper presents a numerical investigation of the hydrodynamic performance of a modified sandglass-type FPSO (Floating Production, Storage and Offloading) with different geometrical parameters. The influence of the roll damping plate on heave and pitch motions of the FPSO was studied in regular waves. To estimate the hydrodynamic performance and utilize the results on the design stage of the FPSO, the boundary element method (BEM) was used. Furthermore, the hydrodynamic performance of two cylindrical and sandglass-type FPSOs under the same conditions was compared in different waves. Five sandglass-type FPSOs with dissimilar inclination angles were utilized with the constant draft. The effects of different inclination angles, including various radii of water-plane part of the floating object on hydrodynamic responses and wave forces applied to the FPSO, were investigated, and presented here. Numerical results were compared against published experimental data of a sandglass-type model, and good agreement was achieved. Based on the simulation results, a conclusion that a sandglass-type FPSO with the inclination angle of 35 degrees proposes proper hydrodynamic performance in both heave and pitch motions for all ranges of wave frequencies was reached. In addition, as it was predicted, the effect of heading sea on a sandglass-type FPSO was significant compared to other wave directions. Finally, by adding a damper plate to the floor of the platform, its hydrodynamic performance is improved. For numerical analysis of the modified FPSO, three different damper sizes are used to investigate its effect on the reduction of the pitch motion amplitude in waves.
Publisher Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie
Keywords sandglass FPSO
Keywords BEM
Keywords regular wave
Keywords roll damper
Keywords dynamic motions
Keywords ANSYS-AQWA
Title Hydrodynamic performance analysis of a modified sandglass- -type FPSO in regular waves using boundary element method
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ISSN on-line 2392-0378
Language English
Funding No data
Figures 10
Tables 3
DOI 10.17402/450
Published 2020-12-14
Accepted 2020-12-11
Recieved 2020-09-16


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