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 458
... cylinder is greater than 0.1-0.2 , diffraction effects become important and damping can result from wave dispersion ( Havelock , 1929 ; Dean and Dalrymple , 1984 ) . In such conditions , an oscillating cylinder is considered to be a ...
... cylinder is greater than 0.1-0.2 , diffraction effects become important and damping can result from wave dispersion ( Havelock , 1929 ; Dean and Dalrymple , 1984 ) . In such conditions , an oscillating cylinder is considered to be a ...
Page 461
... cylinders at the rate of 20 Hz in air and 50 Hz in water for 4000 data points per record . A sampling rate of 4 Hz over 9 channels ( orthogonal ( X , Y ) support forces and waveheight adjacent to each cylinder for all three cylinders ) ...
... cylinders at the rate of 20 Hz in air and 50 Hz in water for 4000 data points per record . A sampling rate of 4 Hz over 9 channels ( orthogonal ( X , Y ) support forces and waveheight adjacent to each cylinder for all three cylinders ) ...
Page 500
... cylinder vibrated in pure translations , i.e. the modal shape factor , y ( z ) as a function of the position along the cylinder axis , z , was given by w ( z ) 1. Most structures will have more complex vibration shapes than this , and ...
... cylinder vibrated in pure translations , i.e. the modal shape factor , y ( z ) as a function of the position along the cylinder axis , z , was given by w ( z ) 1. Most structures will have more complex vibration shapes than this , and ...
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