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 341
... frequency signals . In Fig . 10 the spectra of LF surge and stresses and the relevant linear coherence are shown ... frequency surge stresses relationship . quantita- relationship Cross - bispectral analysis can give a tive indication of ...
... frequency signals . In Fig . 10 the spectra of LF surge and stresses and the relevant linear coherence are shown ... frequency surge stresses relationship . quantita- relationship Cross - bispectral analysis can give a tive indication of ...
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 498
- the transverse motion frequency 21f : wn - 2πfn 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 ...
- the transverse motion frequency 21f : wn - 2πfn 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 ...
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