Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 14American Society of Mechanical Engineers, 1995 - Arctic regions |
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Page 284
... ( Length x Diameter ) V : Relative longitudinal velocity between riser and surrounding water Also to calculate longitudinal resonant period , maximum axial stress was checked by forcibly oscillating the top of full - length riser , which ...
... ( Length x Diameter ) V : Relative longitudinal velocity between riser and surrounding water Also to calculate longitudinal resonant period , maximum axial stress was checked by forcibly oscillating the top of full - length riser , which ...
Page 338
... Length S ( m ) ( a ) Vortex Shedding Frequency Deflection ( m ) 0.2 0.1 Buoyancy Section 0 0 50 100 150 200 250 300 350 Riser Arc Length S ( m ) ( b ) Vibration Amplitude Envelope 400 300 200 100 0 0 50 100 350 400 450 400 450 -100 0 50 ...
... Length S ( m ) ( a ) Vortex Shedding Frequency Deflection ( m ) 0.2 0.1 Buoyancy Section 0 0 50 100 150 200 250 300 350 Riser Arc Length S ( m ) ( b ) Vibration Amplitude Envelope 400 300 200 100 0 0 50 100 350 400 450 400 450 -100 0 50 ...
Page 409
... length , l , of the vortices are small . The limits of the locking - on range 1 , and 12 on the member are controlled by the reduced velocity locking - on criteria . 4.8 < U ( z , t ) fp ( z ) < 8 The correlation length l , is given by ...
... length , l , of the vortices are small . The limits of the locking - on range 1 , and 12 on the member are controlled by the reduced velocity locking - on criteria . 4.8 < U ( z , t ) fp ( z ) < 8 The correlation length l , is given by ...
Contents
DESIGN OF OFFSHORE STRUCTURES | 1 |
Aarsnes | 11 |
A Novel Design Procedure for Jacket Installations | 19 |
Copyright | |
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acceptance criteria added mass ALARP amplitude analysis angle Axial load barge behaviour bending buckling buoy calculated Campos Basin catastrophe sets coefficients collision compliant tower components computed configuration crack crane crane vessel cycles cyclic cylinder damping damping ratio Designer Wave diameter displacement drilling dynamic effects element equation fatigue flexjoint function global heave horizontal hydrodynamic installation ISSC TLP jacket joint lift lift forces linear load kN maximum measured mesh mode model test mooring line motion natural frequency nonlinear obtained Ocean Ocean Ranger Offshore Technology operation oscillation panel parameters platform predicted Quickwave ratio response riser risk shear simulation specimen SSCV Statoil steel stiffness strain stress surge tanker tension tension leg platform transverse tube tubular USFOS values velocity vertical vessel vibration vortex induced vibrations vortex shedding water depth wave forces wave height wave period weight weld toe wellhead wind windspeed