Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 5American Society of Mechanical Engineers, 1988 - Arctic regions |
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Page 64
... FREQUENCY According to Kinsley and Fry [ 5 ] , for a liquid filled pipe , absorption occurs due to viscous resistance at the walls . Their expression for the attenuation with frequency is given by equation ( 4 ) with the attenuation , C ...
... FREQUENCY According to Kinsley and Fry [ 5 ] , for a liquid filled pipe , absorption occurs due to viscous resistance at the walls . Their expression for the attenuation with frequency is given by equation ( 4 ) with the attenuation , C ...
Page 123
... frequency easily identifiable , possible shifted + 50 % from other frequencies which are due to support structure ; this objective was obtained , as monitored spectra showed that the nearest frequencies ( 0.9 , 3.9 Hz ) are quite far ...
... frequency easily identifiable , possible shifted + 50 % from other frequencies which are due to support structure ; this objective was obtained , as monitored spectra showed that the nearest frequencies ( 0.9 , 3.9 Hz ) are quite far ...
Page 131
... frequency dependent weighted function which decays exponentially with distance from the pipe supports . The solution is obtained in the frequency domain using the spectral approach and is presented interms of r.m.s. displacements and ...
... frequency dependent weighted function which decays exponentially with distance from the pipe supports . The solution is obtained in the frequency domain using the spectral approach and is presented interms of r.m.s. displacements and ...
Contents
Model Tests | 3 |
B Bryndum V Jacobsen and D T Tsahalis 9 | 21 |
Scour Under Pipelines | 33 |
Copyright | |
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acoustic velocity analysis Arctic Engineering axial behaviour bending bottom boundary layer buckling cable calculated clamp Cobia compression corrosion crack cylinder deflection deformation developed dew point diameter drag drag coefficient effect elastic equation experimental field Figure finite element flow force coefficients free span frequency friction friction welding function hoop stress horizontal Hydraulic hydrodynamic hydrodynamic forces in-line installation irregular waves length lift coefficient lift force liquid load maximum measured mechanical method monitoring movement nodal analysis operating parameters phase pipe displacement pipe material pipeline predicted pressure procedure ratio response riser roughness SCADA scour sea bed sea floor seabed shown simulated slug soil steady current steel storm strain strain gauges stress structural submarine pipelines surface Technology temperature tion Turning Bands underwater values variation vertical vortex shedding water depth welding zone