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 118
... spans due to scouring the n a existing pipeline in North Sea inspection of the line made two years after Free span density mentioned in the figure al unsupported free span length found in a case stories are completely different . The ...
... spans due to scouring the n a existing pipeline in North Sea inspection of the line made two years after Free span density mentioned in the figure al unsupported free span length found in a case stories are completely different . The ...
Page 121
... spans and of 5 % for low free spans . If these values would prove ey can influence deeply the onset and the in - line oscillations under lock - in remove suggested a test programme , based on a " free span model , with the objective of ...
... spans and of 5 % for low free spans . If these values would prove ey can influence deeply the onset and the in - line oscillations under lock - in remove suggested a test programme , based on a " free span model , with the objective of ...
Page 122
... span . A long flexible pipe is suspended To supports . The supports have low friction hich eliminate bending moments here , but the estraint for torsion . The model is thus an reproduction of the part between the points of a free ...
... span . A long flexible pipe is suspended To supports . The supports have low friction hich eliminate bending moments here , but the estraint for torsion . The model is thus an reproduction of the part between the points of a free ...
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