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 24
... predicted by Eq . ( 2 ) . When a steady current is superimposed the horizontal force prediction becomes less accurate , specifically in half periods where cur- rent and wave induced velocities oppose each other . In these half periods ...
... predicted by Eq . ( 2 ) . When a steady current is superimposed the horizontal force prediction becomes less accurate , specifically in half periods where cur- rent and wave induced velocities oppose each other . In these half periods ...
Page 25
... predictions are substantial . IN / M1 1000.0 500.0f IN 193 500.0 PREL . LIT MEAS . I IF1 wwwwwwww PRED . DRAG MEAS . DRAG 5.0 10.0 15.0 20.0 SEC . Examples of comparisons between measured and LSF- predicted forces for irregular wave ...
... predictions are substantial . IN / M1 1000.0 500.0f IN 193 500.0 PREL . LIT MEAS . I IF1 wwwwwwww PRED . DRAG MEAS . DRAG 5.0 10.0 15.0 20.0 SEC . Examples of comparisons between measured and LSF- predicted forces for irregular wave ...
Page 28
... PREDICTED FORCES ( NEW MODEL ) www 75 N / m 4 FH 250- -250- 80 85 100 sec MEASURED FORCES PREDICTED FORCES ( TRAD MODEL ) www 60 85 1100 -500 N / MA FH a ) 250 -250- -500 . N / m 4 FH b ) 250 Fig . 10 Time Series of Measured and ...
... PREDICTED FORCES ( NEW MODEL ) www 75 N / m 4 FH 250- -250- 80 85 100 sec MEASURED FORCES PREDICTED FORCES ( TRAD MODEL ) www 60 85 1100 -500 N / MA FH a ) 250 -250- -500 . N / m 4 FH b ) 250 Fig . 10 Time Series of Measured and ...
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