Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9, Part 5American Society of Mechanical Engineers, 1990 - Arctic regions |
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Page 68
Parameter Symbol Present Approach * Length / Diameter Ratio L / D Considered Reduced Vibration Amplitude Y / D , Z / D Considered Gap Ratio € / D Preserved Reduced Velocity Ur Preserved Frequency Ratio fr Preserved Parameter Units Span ...
Parameter Symbol Present Approach * Length / Diameter Ratio L / D Considered Reduced Vibration Amplitude Y / D , Z / D Considered Gap Ratio € / D Preserved Reduced Velocity Ur Preserved Frequency Ratio fr Preserved Parameter Units Span ...
Page 121
... ratio ex : Max . voids ratio : Total horizontal soil resistance force : Submerged pipe weight INTRODUCTION In recent years several projects have been conducted into the stability of on - bottom pipelines subjected to combined wave and ...
... ratio ex : Max . voids ratio : Total horizontal soil resistance force : Submerged pipe weight INTRODUCTION In recent years several projects have been conducted into the stability of on - bottom pipelines subjected to combined wave and ...
Page 184
... ratio R where : R = q x L F where q = maximum bearing capacity L = length of base of dead wedge F = reaction of base of dead wedge as determined by the passive pressure algorithm The calculated ratio , R , cannot be used in a ...
... ratio R where : R = q x L F where q = maximum bearing capacity L = length of base of dead wedge F = reaction of base of dead wedge as determined by the passive pressure algorithm The calculated ratio , R , cannot be used in a ...
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addition analysis applied approach assessment assumed bending calculations caused considered CONTINUE corrosion crack damage deformation depth described diameter direction displacement distribution effect energy Engineering ensemble equations factors failure field Figure flow force fracture function given hole included increase initial installation internal layer length limit load material maximum mean measured mechanical method mode movement obtained occurred Offshore operation parameters pipe pipeline plastic plate platform position predicted presented pressure probability problem procedure properties radial range reduced relative reliability resistance response safety scaling scour seabed shown shows simulated soil solution span stability steel strain strength stress structure subsea surface Table term thickness toughness tracers tube uncertainty values valve variables wall wave weight weld