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 467
... natural frequencies and the damping ratios of the structure . The structure was ini- tially deformed by pulling it ... frequency and the damping ratio for the assumed theoret- ical model of the measured naturally decaying response . Fig . 4 ...
... natural frequencies and the damping ratios of the structure . The structure was ini- tially deformed by pulling it ... frequency and the damping ratio for the assumed theoret- ical model of the measured naturally decaying response . Fig . 4 ...
Page 498
... natural frequency of the i - th mode ( rad / s ) natural 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 ...
... natural frequency of the i - th mode ( rad / s ) natural 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 ...
Page 584
... natural frequency of vibration , by calculating the roots of the determinant of the dynamic stiffness matrix . 7. RESULTS OF TESTS The three joints tested so far are shown the results given below . The frequency spectra corresponding to ...
... natural frequency of vibration , by calculating the roots of the determinant of the dynamic stiffness matrix . 7. RESULTS OF TESTS The three joints tested so far are shown the results given below . The frequency spectra corresponding to ...
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