Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2American Society of Mechanical Engineers, 2001 - Arctic regions |
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Page 148
... the wave - induced current , and the opposing soil resistance force , which in
turn is a function of the lift force , Fi , arising from the wave - induced and steady
currents , the pipeline weight , wt , and the soil friction , with friction coefficient , f .
... the wave - induced current , and the opposing soil resistance force , which in
turn is a function of the lift force , Fi , arising from the wave - induced and steady
currents , the pipeline weight , wt , and the soil friction , with friction coefficient , f .
Page 343
At present a full 3D FEA models are used for global stress analysis which is a
combination of sub - models of the heavy lift vessel , the ... For these reasons the
sea fastening capacity is evaluated separately assuming a small friction
coefficient .
At present a full 3D FEA models are used for global stress analysis which is a
combination of sub - models of the heavy lift vessel , the ... For these reasons the
sea fastening capacity is evaluated separately assuming a small friction
coefficient .
Page 376
The hydrodynamic module calculates drag - and lift coefficients based on the
instantaneous relative position between the risers An efficient model for ... The
load model accounts for these effects in terms of pre - defined coefficient tables .
The hydrodynamic module calculates drag - and lift coefficients based on the
instantaneous relative position between the risers An efficient model for ... The
load model accounts for these effects in terms of pre - defined coefficient tables .
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acceptable analysis applied approach assessment associated assumed calculated coefficient combined components considered corresponding corrosion cost crack criteria damage defined dependent depth determined developed direction distribution dynamic effect element Engineering environmental equation estimate evaluated event example expressed extreme factor failure fatigue Figure force frequency function fuzzy given important increase initial inspection International limit load loss maintenance maximum mean measured Mechanics method motion normal obtained offshore operational parameters peak performed period pipe pipeline platform possible predicted present probability probability of failure procedure production random range relative reliability represents response return period riser risk safety ship shown shows simulation spectral spectrum statistical storm strength stress structure surface Table theory typical ultimate uncertainties variables wave height wind