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 189
... cylinder was hinged at the bottom . The cylinder was kept in upright position by a spring - force transducer system at the top . Each spring had a spring coefficient of 0.78 N / mm . For some tests the spring at the top was omitted ...
... cylinder was hinged at the bottom . The cylinder was kept in upright position by a spring - force transducer system at the top . Each spring had a spring coefficient of 0.78 N / mm . For some tests the spring at the top was omitted ...
Page 190
... cylinder system The equation of motion of the cylinder around the bottom hinge is = 1 ( 1 ) + p I Ô + CÔ + k120 ( h + z ) [ o C , D ( u − 8 ( h + z ) ) | ( u − O ( h + z ) ) | πD2 i + p C c2 πD2 ( D4 ) - 0 ( h + Du 4 Dt ( h + z ) ...
... cylinder system The equation of motion of the cylinder around the bottom hinge is = 1 ( 1 ) + p I Ô + CÔ + k120 ( h + z ) [ o C , D ( u − 8 ( h + z ) ) | ( u − O ( h + z ) ) | πD2 i + p C c2 πD2 ( D4 ) - 0 ( h + Du 4 Dt ( h + z ) ...
Page 324
TABLE 1 : Parameters in riser collision study Radius of cylinders 1.0m Cylinder mass Steady flow velocity Natural period in air 6150 kg / m 1.0m / s 7.0 s Damping as fraction of critical damping 0.1 TABLE 2 : Response characteristics ...
TABLE 1 : Parameters in riser collision study Radius of cylinders 1.0m Cylinder mass Steady flow velocity Natural period in air 6150 kg / m 1.0m / s 7.0 s Damping as fraction of critical damping 0.1 TABLE 2 : Response characteristics ...
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