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 147
... natural frequency of the system . For a soft system , the natural periods are long , often outside the frequency range of the waves . In this case , the difference between two adjacent frequencies in the ocean waves excite the structure ...
... natural frequency of the system . For a soft system , the natural periods are long , often outside the frequency range of the waves . In this case , the difference between two adjacent frequencies in the ocean waves excite the structure ...
Page 148
... natural period . TEST MODEL DESCRIPTION The test model was chosen as a single vertical cylinder representing one of the cylindrical columns of a typical TLP . The test cylinder was chosen as large as possible without affecting the tests ...
... natural period . TEST MODEL DESCRIPTION The test model was chosen as a single vertical cylinder representing one of the cylindrical columns of a typical TLP . The test cylinder was chosen as large as possible without affecting the tests ...
Page 301
... natural frequency of the cylin- der concerned ( ie excitation occurs at the natural frequency which is below that of the forcing frequency ) . However this form of excita- tion is not always realizable for a given situation and is found ...
... natural frequency of the cylin- der concerned ( ie excitation occurs at the natural frequency which is below that of the forcing frequency ) . However this form of excita- tion is not always realizable for a given situation and is found ...
Contents
A Study on the Stability Criteria of Semisubmersibles | 4 |
Sharan and Praveen Kalra | 6 |
CASE HISTORIES | 7 |
Copyright | |
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added mass amplitude analysis approximately average boundary condition boundary layer cable calculated circular cylinder components computed crest damping coefficient damping ratio density diffraction dimensionless displacement drag coefficient dynamic effects Ekofisk estimates experimental Figure first-order floating fluid force coefficients free surface frequency domain Green function heave horizontal hydrodynamic hydrodynamic forces incident wave inline force integral equation irregular lift force linear loads low frequency low-frequency surge maximum mean drift forces measured method mooring motion natural frequency nonlinear obtained Offshore Technology open boundary oscillation oscillatory flow parameters phase velocity platform predicted pressure random wave ratio regular waves Reynolds number Sarpkaya second order second-order wave shown simulation solitary waves solution spectral spectrum standard deviation surge response tank tanker tests transfer function transverse values velocity potential vertical vortex vortices wave damping wave drift damping wave elevation wave forces wave height wave-current