Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 4American Society of Mechanical Engineers, 2001 - Arctic regions |
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Page 32
... reduced ice moving velocity V / ( Lf ) . It can be seen that the severe vibration happens in the range of flf , = V ( Lf ) ≤1.5 . The displacement responses will be rapidly reduced when the frequency lies in the range of f / f = V ...
... reduced ice moving velocity V / ( Lf ) . It can be seen that the severe vibration happens in the range of flf , = V ( Lf ) ≤1.5 . The displacement responses will be rapidly reduced when the frequency lies in the range of f / f = V ...
Page 34
... reduced ice moving velocity ( 1 = 100 , α = 0.2 , μ = 0.125 ) 5 3 2 1 UR UR AL = 0.04 = 0.08 = 0.16 0 0 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 2 VILS Fig.4 The displacement of structure vs. reduced ice moving velocity ( / = 100 , α = 0.2 , μ ...
... reduced ice moving velocity ( 1 = 100 , α = 0.2 , μ = 0.125 ) 5 3 2 1 UR UR AL = 0.04 = 0.08 = 0.16 0 0 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 2 VILS Fig.4 The displacement of structure vs. reduced ice moving velocity ( / = 100 , α = 0.2 , μ ...
Page 175
... reduced to about -0.05 as the cracked section carries the load more and more by membrane forces . As the applied J increases , the constraint reduces . Hence , the corresponding fracture toughness increases , see also Fig.2 . Pipe ...
... reduced to about -0.05 as the cracked section carries the load more and more by membrane forces . As the applied J increases , the constraint reduces . Hence , the corresponding fracture toughness increases , see also Fig.2 . Pipe ...
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accretion analysis annulus Arctic Engineering Arctic Ocean axial loading behavior bending stiffness Bohai buckle arrestor cable calculated carrier pipe catenary coefficient collapse compressive Conference on Offshore configuration corrosion crack damping ratio deepwater defect deformation Det Norske Veritas developed diameter displacement dynamic elastic experimental failure pressures Figure finite element finite element analysis flexible pipe flowline fluid fracture freespans gauge grooves heat transfer heat transfer coefficient hummocks ice force ice load ice sheet increase installation insulation internal pressure layer length liner maximum Mechanics and Arctic method Offshore Mechanics operation parameters PETROBRAS phase pipeline pipeline system plastic predicted ratio reeling Rio de Janeiro riser system risk sagging sand scour sea ice seabed shear stress simulation soil specimens stamukhas steel strain strain gauges stress structure subsea surface temperature tension tests thermal thickness titanium values velocity water depth weld wrinkle