Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 10American Society of Mechanical Engineers, 1991 - Arctic regions |
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Page 498
... motion cycle may vary by several hundred percent . In other words : a very irregular hydrodynamic force drives an almost regular motion . The system damping was small and almost constant within the observed range of motion , thus the ...
... motion cycle may vary by several hundred percent . In other words : a very irregular hydrodynamic force drives an almost regular motion . The system damping was small and almost constant within the observed range of motion , thus the ...
Page 543
... motion of the 450 cable at the supports was at or below the measurement resolution of the system . The four cases with the largest motions were for the List 1 cable ; round rock with 7 percent slack , cleaved rock with 7 percent slack ...
... motion of the 450 cable at the supports was at or below the measurement resolution of the system . The four cases with the largest motions were for the List 1 cable ; round rock with 7 percent slack , cleaved rock with 7 percent slack ...
Page 636
... motion st . dev . HF motion Heave ( m ) 20 0.3 0.1 0.0 04 05 12 27 Institution No. Figure 4 : DDF . Motion response in design condition ( H = 15.5 m ) . Standard deviations of first order ( HF ) and low frequency ( LF ) motion response ...
... motion st . dev . HF motion Heave ( m ) 20 0.3 0.1 0.0 04 05 12 27 Institution No. Figure 4 : DDF . Motion response in design condition ( H = 15.5 m ) . Standard deviations of first order ( HF ) and low frequency ( LF ) motion response ...
Contents
CASE HISTORIES OFFSHORE STRUCTURES | 331 |
OFFSHORE TECHNOLOGY PART | 337 |
OFFSHORE STRUCTURE CONCEPTS | 361 |
Copyright | |
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acceleration accelerometers added mass amplitude axial beam behaviour bending stiffness cable calculated Campos Basin catenary coefficient compliant tower components curvature curves cylinder damping ratio deck deformation developed diameter displacement drag drag coefficient dynamic analysis dynamic response effect Ekofisk elastic Engineering equation finite element finite element method flexible pipe fluid force free-fall lifeboat frequency domain hydrodynamic hydrodynamic damping impact in-span installation jack jacket joint launch length lift force linear load Mathieu Mathieu equation measured Mechanics meters method mode mode shape motion natural frequency nodal nodes nonlinear obtained Offshore Structures OMAE operation oscillation parameters phase pile platform pressure rotation seabed semi-rigid shear shown in Figure skin friction soil solution SPUS static analysis stiffness matrix submarine subsea support point tension tether torque transverse values vector velocity vertical vessel vibration Volume I-B water depth