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 36
... normal pipe ( α = 90 ° ) and an oblique pipe ( α -30 ° ) . For a normal pipe , the two scour stages are quite clear . But when the oblique angle d = 30 , the scour rate in the early stage is rather small and the final scour depth is ...
... normal pipe ( α = 90 ° ) and an oblique pipe ( α -30 ° ) . For a normal pipe , the two scour stages are quite clear . But when the oblique angle d = 30 , the scour rate in the early stage is rather small and the final scour depth is ...
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 82
... normal function with a mean value given by Equation ( 7 ) and a variance which is a function of the mean . Because of the many simplifications made in the process , the assumption of a normal function may be useful for some applications ...
... normal function with a mean value given by Equation ( 7 ) and a variance which is a function of the mean . Because of the many simplifications made in the process , the assumption of a normal function may be useful for some applications ...
Contents
OFFSHORE MECHANICS | 3 |
Seabed Scour Under Pipelines | 33 |
Flow Around and Forces on a Pipeline Near a Scoured | 39 |
Copyright | |
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acoustic velocity analysis Arctic Engineering axial bending bottom clamp boundary layer buckling calculated clad pipes clamp elevation compression Conference on Offshore crack cylinder deflection deformation developed dew point diameter drag drag coefficient effect electrode equation experimental Figure finite element finite element analysis flow force coefficients free span frequency friction function hoop stress hydrodynamic hydrodynamic forces in-line installation leak detection leak detection system length lift coefficient lift force line pipes liquid load maximum measured Mechanics and Arctic method monitoring nodal analysis Offshore Mechanics operating parameters phase pipe displacement pipeline pore predicted present pressure procedure ratio regular waves response riser roughness SCADA scour sea bed sea floor seabed shown simulated soil steady current strain strain gauges stress structural submarine pipelines surface technique temperature thickness tion two-phase flow values variation vertical vortex shedding weld metal