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
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