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 91
... Displacement ( mm ) Fig.6 Measured and calculated in - line displacements of towed pipe ( fixed at top ) . afn +1 ... displacement , velocity and acceleration . 1 afn + 1 BAt2 da +1 BAt dv +1 Υ afn + 1 Jfn + 1 - ) εu ( 17 ) Ju 2 + 1 k + ...
... Displacement ( mm ) Fig.6 Measured and calculated in - line displacements of towed pipe ( fixed at top ) . afn +1 ... displacement , velocity and acceleration . 1 afn + 1 BAt2 da +1 BAt dv +1 Υ afn + 1 Jfn + 1 - ) εu ( 17 ) Ju 2 + 1 k + ...
Page 206
... displacement values . It is obvious from these results that any amount of shear introduced in the flow field will result in reduced displacement amplitudes . When attempting to predict the long term effect of vortex - induced vibration ...
... displacement values . It is obvious from these results that any amount of shear introduced in the flow field will result in reduced displacement amplitudes . When attempting to predict the long term effect of vortex - induced vibration ...
Page 207
RMS Displacement ( cm ) Current Speed ( m / s ) Current Speed ( m / s ) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Q O 36 0 0.5 0.4 0.3 0.2 0.1 0 0 600 to g's 2 / Hz RMS Displacement ( cm ) 0.8 0.6 0.4 0.2 2 1.9 1.8 1.7 1.6 ...
RMS Displacement ( cm ) Current Speed ( m / s ) Current Speed ( m / s ) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Q O 36 0 0.5 0.4 0.3 0.2 0.1 0 0 600 to g's 2 / Hz RMS Displacement ( cm ) 0.8 0.6 0.4 0.2 2 1.9 1.8 1.7 1.6 ...
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