Open AccessNumerical analysis of varies geometries on dynamic analysis on the gravity platform
Author(s) -
T. Mirzaei Rezaei,
A. Mohammadi,
Elham Mina,
Mohammad Reza Kavianpour
Publication year - 2019
Publication title -
innovaciencia
Language(s) - English
Resource type - Journals
ISSN - 2346-075X
DOI - 10.15649/2346075x.764
Subject(s) - moment (physics) , mechanics , base (topology) , wavelength , physics , ground motion , motion (physics) , numerical analysis , geology , classical mechanics , geometry , structural engineering , mathematics , mathematical analysis , engineering , optics
On Gravity platform Dynamic Response is a support structure held in place by gravity. Given that the gravity platforms are supportedby the sea bed but not attached to the ground, the motion of them is known as a rocking fluctuation. During the fluctuations, theplatform maybe overturned if the angle is large. In this study, using Ansys Aqwa hydrodynamic software and analytical methods withregard to the performance, the dynamic interaction of platform’s geometry on hydrodynamic forces have been simulated. Theobjective of this study was to analyze the hydrodynamic parameters of the sea and rocking fluctuations of gravity platforms under theimpact of regular wave’s moment considering the soil mechanics and hydrodynamic features of the structure. In order to achievethe objective the hydrodynamic forces using numerical simulations and analytical methods for one column and three hollow columnsplatforms were analyzed. Finally, responses of the platform to irregular waves were studied using numerical simulation. The resultsshowed that with the increasing of the depth, the impact of wave’s force and moment on the base of platform are reduced throughexponential relationship. The reductions are due to the effective depth that is equal to half the wave length. The results suggestthat the response of the rocking motion of gravity platform shows significant changes in relation to height and wavelength. Based onthe curves fitted to the data of the fluctuation angle, sustainability of the platform in the rocking motion can be thoroughly andcompletely investigated.