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 481
... body . INTRODUCTION The study of the production of surface waves by a single oscillation body was initiated by Ursell ( 1 ) . Since then it has been attracting much attention . It is hoped to determine the produced waves by the ...
... body . INTRODUCTION The study of the production of surface waves by a single oscillation body was initiated by Ursell ( 1 ) . Since then it has been attracting much attention . It is hoped to determine the produced waves by the ...
Page 483
... body A B B A and body B , ( x , z ) and ( Xo , zo ) are the rotational centers of body A and body B , M M ( X - X ) , M , M ( Z - ZO ) , M A A zb = B B ' B = za A M ( Zc - za , M = Α ' xa = xb 9 M and B B A M are the mass of body A and ...
... body A B B A and body B , ( x , z ) and ( Xo , zo ) are the rotational centers of body A and body B , M M ( X - X ) , M , M ( Z - ZO ) , M A A zb = B B ' B = za A M ( Zc - za , M = Α ' xa = xb 9 M and B B A M are the mass of body A and ...
Page 485
... body problem ( R / D = 1 : 2 , R / L = 1 : 2 ) . 10 0 -10 -20 -A . 11 22 A33 B 22 B 33 w2R / g 0 2 3 5 6 7 Fig . 4. Damping coefficient for the upwave body of twin- body . 10 4 3 Heave 2 W -30 2R / g Sway 0 1 2 3 5 6 7 Roll 1 Fig . 3 ...
... body problem ( R / D = 1 : 2 , R / L = 1 : 2 ) . 10 0 -10 -20 -A . 11 22 A33 B 22 B 33 w2R / g 0 2 3 5 6 7 Fig . 4. Damping coefficient for the upwave body of twin- body . 10 4 3 Heave 2 W -30 2R / g Sway 0 1 2 3 5 6 7 Roll 1 Fig . 3 ...
Contents
CASE HISTORIES OFFSHORE STRUCTURES | 331 |
OFFSHORE TECHNOLOGY PART | 337 |
OFFSHORE STRUCTURE CONCEPTS | 361 |
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acceleration accelerometers added mass amplitude axial behaviour bending stiffness cable calculated Campos Basin catenary coefficient components coordinate 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 flexible riser fluid free-fall lifeboat frequency domain hydrodynamic hydrodynamic damping impact in-span installation jack jacket joint launch length lifeboat lift force linear load Mathieu Mathieu equation measured Mechanics meters method mode mode shape motion natural frequency nodal nodes nonlinear obtained Offshore Structures Offshore Technology ASME OMAE operation oscillation parameters phase pile platform pressure ratio rotation seabed 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