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 35
... direction is oscillatory , the coefficient of pressure difference at the bed between the two sides of the pipe can be as high as 3 ( cf. Fig.9 ) Due to the inverse of flow direction the flow state around the pipe is rather complex . Eq ...
... direction is oscillatory , the coefficient of pressure difference at the bed between the two sides of the pipe can be as high as 3 ( cf. Fig.9 ) Due to the inverse of flow direction the flow state around the pipe is rather complex . Eq ...
Page 36
... direction . Soon , the scour e can be considered as two - dimen- can be split up into two stages : wake period . As shown in Fig.10 the gap between the pipe and the d the downstream hill is rela- s rushing sand particles away . ortex ...
... direction . Soon , the scour e can be considered as two - dimen- can be split up into two stages : wake period . As shown in Fig.10 the gap between the pipe and the d the downstream hill is rela- s rushing sand particles away . ortex ...
Page 80
... direction is extremely important . Pipeline response will be mostly affected by waves normal to the line . Let Pij ( H1 , ) be the joint probability of storm peak seastate and direction , then Σ Pij ( Hi , j ) 1 . ij i 1,2 ,. m ( 1 ) j ...
... direction is extremely important . Pipeline response will be mostly affected by waves normal to the line . Let Pij ( H1 , ) be the joint probability of storm peak seastate and direction , then Σ Pij ( Hi , j ) 1 . ij i 1,2 ,. m ( 1 ) j ...
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