Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volumes 1-2American 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
VORTEX SHEDDING AND VIBRATION | 187 |
OCEAN WAVES AND CURRENT | 209 |
COMPUTATIONAL METHODS | 247 |
Copyright | |
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added mass amplitude analysis approximately average body boundary condition cable calculated circular cylinder components computed correlation density diffraction displacement distribution drag coefficient dynamic effects Ekofisk Engineering experimental field Figure finite element floating flow fluid free surface frequency domain function Green function horizontal hydrodynamic hydrodynamic forces incident wave integral equation irregular waves length lift force linear load low-frequency matrix maximum measured method mode mode shapes mooring motion natural frequency nonlinear obtained Ocean Offshore Structures OMAE open boundary oscillation parameters phase velocity platform predicted present pressure problem random waves ratio response Reynolds number riser Sarpkaya seabed second-order ship simulation small forward solitary wave solution spectral spectrum stiffness surge tank tanker tension tether theory transverse values vector velocity potential vertical vessel vibration vortex vortices water depth wave drift damping wave forces wave height wave profile