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 346
... frequency component . To compare the both results , the low frequency component shown in Fig.5 was subtracted from time series of Fig.4 ( b ) using FFT and inverse FFT method , and the high frequency component was shown in Fig.6 ...
... frequency component . To compare the both results , the low frequency component shown in Fig.5 was subtracted from time series of Fig.4 ( b ) using FFT and inverse FFT method , and the high frequency component was shown in Fig.6 ...
Page 467
... frequency and the damping ratio for the assumed theoret- ical model of the measured naturally decaying response . Fig . 4 shows the fitting of the measured data with the prediction . The first fundamental natural frequency of the ...
... frequency and the damping ratio for the assumed theoret- ical model of the measured naturally decaying response . Fig . 4 shows the fitting of the measured data with the prediction . The first fundamental natural frequency of the ...
Page 498
... frequency of test rig , in air . vortex shedding frequency based on the Strouhal number . 1. INTRODUCTION The prediction of riser behaviour under actual conditions is a formidable task and one in which considerable uncertainties remain ...
... frequency of test rig , in air . vortex shedding frequency based on the Strouhal number . 1. INTRODUCTION The prediction of riser behaviour under actual conditions is a formidable task and one in which considerable uncertainties remain ...
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