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 38
... normal to the pipe axis ( α = 90 ° ) , vortex shedding has its strongest scour ability . Later on , when a > 90 , its scour ability is weakening with the increase of the oblique angle . For the pipe with a small oblique angle , there ...
... normal to the pipe axis ( α = 90 ° ) , vortex shedding has its strongest scour ability . Later on , when a > 90 , its scour ability is weakening with the increase of the oblique angle . For the pipe with a small oblique angle , there ...
Page 68
... normal SCADA functions . Monitor the pipeline operating conditions and batch locations during operation and shutdown . Retrieve and display collected data independently from SCADA . The system must also present data and alarm messages ...
... normal SCADA functions . Monitor the pipeline operating conditions and batch locations during operation and shutdown . Retrieve and display collected data independently from SCADA . The system must also present data and alarm messages ...
Page 108
during after a Point Depth Load Normal after new frost rainy period dry period backfill after a ( 1 ) fr . 20t 7.63 8.31 5.59 7.49 ... normal conditions rear wheel of the 20 T vehicle Zone C FIG . 3 : Experimental pipe UPLIFTING FORCE 108.
during after a Point Depth Load Normal after new frost rainy period dry period backfill after a ( 1 ) fr . 20t 7.63 8.31 5.59 7.49 ... normal conditions rear wheel of the 20 T vehicle Zone C FIG . 3 : Experimental pipe UPLIFTING FORCE 108.
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