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 426
... determined by : 8 r n ï ̧ = ± • ̧Ÿ¡ ( t ) = • ÿ ( t ) i = 1 LAT ( 10 ) Im E m m6 18 17 These physical accelerations determine the d'Alem- bert forces acting on the platform . Sectional forces and moments in the platform are then determined ...
... determined by : 8 r n ï ̧ = ± • ̧Ÿ¡ ( t ) = • ÿ ( t ) i = 1 LAT ( 10 ) Im E m m6 18 17 These physical accelerations determine the d'Alem- bert forces acting on the platform . Sectional forces and moments in the platform are then determined ...
Page 467
... determined using the conventional logarithmic decrement method in which the normal exponential envelope curve is con- sidered . The envelope curve is generally fitted only based on a few points on the time decaying data . The result is ...
... determined using the conventional logarithmic decrement method in which the normal exponential envelope curve is con- sidered . The envelope curve is generally fitted only based on a few points on the time decaying data . The result is ...
Page 559
... determined to fulfil w ( 0 ) = w1 and w ( H ) = W2 : W = a b = W1 W2 W - W 1 W2 W 1 W2 ( 32 ) ( 33 ) If w1 and we have opposite signs the form parameter b will lie between -1 and 0 and the load model Eq . ( 12 ) will be singular within ...
... determined to fulfil w ( 0 ) = w1 and w ( H ) = W2 : W = a b = W1 W2 W - W 1 W2 W 1 W2 ( 32 ) ( 33 ) If w1 and we have opposite signs the form parameter b will lie between -1 and 0 and the load model Eq . ( 12 ) will be singular within ...
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