...,sconnected under severe weather cond1t1ons. 1ts k1nd .n the North Sea. Veslefr~kk .s the f1rst of It represents a cost effect1v solut10n w1th several .mportant safety features and could be an .nterest1ng concept for future development of small and m1ddle s1zed f1elds. Subsea Systems A few years ago many...

... bi-frequency domain sum frequency frequency monochromatic wave mooring system equation upstream oil & gas surge response experiment dual wave subsea system coefficient drift force drift motion wave drift amplitude surge drift motion prediction excitation slow drift motion...

... test nr deck structure mooring system moored articulated column platform foundation loading boom operation construction flowline hydrocarbon substructure upstream oil & gas template subsea system 1990. The International Society of Offshore and Polar Engineers ...

... strength formula internal pressure effective axial force calculation offshore platform conductor interaction formula internal overpressure platform design true force cross sectional area subsea system upstream oil & gas equation conductor system overpressure 1990. The International...

... of computation time. One possible alternative is the HTFD approach. Through comparative study between the HTFD and TO approaches, the application of the HTFD approach is studied. element method artificial intelligence conf subsea system analysl nonlinearity rayleigh distribution fatl prediction...

... attachment to the hull. The resonant response phenomenon was investigated in some detail during the project. wave period frequency subsea system well control station tether tether tension upstream oil & gas idealisation nonlinear analysis wave height reference design domain analysis...

... mooring system anchor spatial integration configuration subsea system coefficient differential equation 1990. The International Society of Offshore and Polar Engineers ...

... (Newman, 1974), (Bowers, 1976), (Pinkster, 1979). However, such approximations tend to break down for higher frequencies and/or for the vertical motions. Matsui (1989) has computed the exact second-order forces and his approach is adopted here, as described in section 2. subsea system proceedmg...

... stability analysis approximation attractor resonance equation mooring system frequency response subsea system variational equation global bifurcation artificial intelligence bifurcation superharmonic resonance algorithm stability 1990. The International Society of Offshore and Polar...

... One 15 an analytical method (MODEL 1) based on the catenary equations and an estimate of the drag resistance of the line The other describes a dynamic system based on a Single degree of freedom (MODEL 2). dynamic line tension riflex inertia force drag force calculation subsea system hne...

... the amount of the reduction of the dynamic tension amplification obtained can then be incorporated within a consistent optimization procedure (Mavrakos et al, 1989c). triantafyuou numerical result papazoglou equation mavrako configuration elasticity buoy subsea system procedure similitude...

.... stress concentration stiffened joint india jolnt chord ring stiffener scf annual offshore technology conference reduction intersection stiffener offshore structure upstream oil & gas thickness subsea system strength unstiffened joint internal ring stiffener tubular joint 1990...

... problems of a wide variety of offshore structures. This new system, the integrated program system for offshore structures, is abbreviated to IPOS in this paper. subsea system spectrum motion response wave period program system analysis program offshore structure beam sea mooring system...

... of the mean drift force and it was used successfully to improve position keeping. real time estimation incident wave impulse response transfer function transformation subsea system artificial intelligence quadratic transfer function calculation impulse response function frequency real time...

... to the knowledge of structural behaviour. In structural analysis there are two basic approaches. The first is called "direct", where stresses and strains in a structure are determined on the basis of definition of external loads. pile foundation upstream oil & gas evaluation foundation subsea...

..., and a four-column deep-draught floater (DDF), the latter being a very large semi-submersible type structure. formula keulegan-carpenter number subsea system coefficient production ship experimental data frequency upstream oil & gas bearman deep-draught floater drag coefficient...

... phenomena had been confirmed by many researchers. drag force coefficient upstream oil & gas vertical cylinder time series platform simple cylinder frequency wave force time series structural response hydrodynamic coefficient subsea system experiment resonant response wave force...

...). strength hydrogen embrittlement pipeline corrosion fracture toughness corrosion inhibition materials and corrosion test result toughness welding flowline corrosion oilfield chemistry heat treatment weldment cathodic protection sea water subsea system riser corrosion specimen chemical...

.... level ground condition us government shear stress static shear stress frequency cyclic loading normandeau initial locked-in static shear stress upstream oil & gas platform earthquake subsea system displacement investigation laboratory newmark locked-in static shear stress...

... significant wave height environmental variable artificial intelligence extreme value formulation subsea system 1990. The International Society of Offshore and Polar Engineers ...