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 507
... tether pre - tension is reduced , the wave- induced time - varying axial force becomes important in its dynamics and causes the tether to undergo parametric oscillations described by the Mathieu equation . Fortunately , in the case of a ...
... tether pre - tension is reduced , the wave- induced time - varying axial force becomes important in its dynamics and causes the tether to undergo parametric oscillations described by the Mathieu equation . Fortunately , in the case of a ...
Page 508
... tether tension reductions . Brekke and Gardner [ 1 ] analysed the tether bending stress , platform motion and tether re- tensioning by a numerical simulation when tethers experience brief tension loss . They concluded that a brief ...
... tether tension reductions . Brekke and Gardner [ 1 ] analysed the tether bending stress , platform motion and tether re- tensioning by a numerical simulation when tethers experience brief tension loss . They concluded that a brief ...
Page 511
... tether is in a slack condition , all the response amplitudes in the stable regions of the Mathieu chart become zero . Therefore , in terms of parametric oscillation , slack tethers can be undoubtedly adopted in stable regions . However ...
... tether is in a slack condition , all the response amplitudes in the stable regions of the Mathieu chart become zero . Therefore , in terms of parametric oscillation , slack tethers can be undoubtedly adopted in stable regions . However ...
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