Dynamic response of spar platform subjected to far-field underwater shock

The exploitation of hydrocarbon reservoirs under the seabed in very deep water requires the use of innovative floating platform configurations. The hydrodynamic interaction of such platforms with underwater explosion shock and the understanding and quantification of the dynamic response of these interactions has been a subject of continuing research. This paper examines these dynamic responses for a specific very deep draft spar platform type that is increasingly being used in the oceans. A spar platform must be safe due to underwater shock. The dynamic response of spar platform to underwater shock is very complex. A complete analysis of the problem must involve simultaneous solution of the dynamic response of structure and the propagation of shock wave in surrounding fluid, which makes such general analysis prohibitively expensive. To alleviate the difficulty a method is proposed for a typical spar platform. An explicit method was conducted using finite element based coupled structure and fluid model. In this research for the first time dynamic behavior of typical spar platforms is investigated by underwater explosion models .The results of this research can be used for design of spars against time dependent load such as wind, wave, earthquake and similar forces.

کلیدواژه ها:

Dynamic response ، Spar platform ، Underwater shock ، Fluid - Structure interaction