Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volumes 1-2American Society of Mechanical Engineers, 1991 - Arctic regions |
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Page 120
INTRODUCTION A cost optimal fatigue design of a structure is performed to minimize its total expected lifetime costs . These costs usu- ally include initial design costs , inspection costs , mainte- nance costs and costs of failure ...
INTRODUCTION A cost optimal fatigue design of a structure is performed to minimize its total expected lifetime costs . These costs usu- ally include initial design costs , inspection costs , mainte- nance costs and costs of failure ...
Page 122
... costs C in the time interval [ T ,, T ] ( excluding inspection costs ) can be expressed through the following expression ; 18 / = P DIS Ti + 1 00 SSC ( a ( t ) f da dt a ( t ) | 0,8 T 0 118 + Σ 3 / 83 + Cinsp ( 93 ) ) - ( 22 ) Ti + 100 ...
... costs C in the time interval [ T ,, T ] ( excluding inspection costs ) can be expressed through the following expression ; 18 / = P DIS Ti + 1 00 SSC ( a ( t ) f da dt a ( t ) | 0,8 T 0 118 + Σ 3 / 83 + Cinsp ( 93 ) ) - ( 22 ) Ti + 100 ...
Page 287
... cost factor CIN , ( ē ) is modelled by CIN , ( 7 ) = 0.0125 + 0.1e . The CR , factor in the repair costs is taken as CR1 = 1.25 and CF is assumed to be constant equal to 250. All costs are in million D - mark . The lower limit 8min on ...
... cost factor CIN , ( ē ) is modelled by CIN , ( 7 ) = 0.0125 + 0.1e . The CR , factor in the repair costs is taken as CR1 = 1.25 and CF is assumed to be constant equal to 250. All costs are in million D - mark . The lower limit 8min on ...
Contents
VORTEX SHEDDING AND VIBRATION | 187 |
OCEAN WAVES AND CURRENT | 209 |
COMPUTATIONAL METHODS | 247 |
Copyright | |
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added mass amplitude analysis approximately average body boundary condition cable calculated circular cylinder components computed correlation density diffraction displacement distribution drag coefficient dynamic effects Ekofisk Engineering experimental field Figure finite element floating flow fluid free surface frequency domain function Green function horizontal hydrodynamic hydrodynamic forces incident wave integral equation irregular waves length lift force linear load low-frequency matrix maximum measured method mode mode shapes mooring motion natural frequency nonlinear obtained Ocean Offshore Structures OMAE open boundary oscillation parameters phase velocity platform predicted present pressure problem random waves ratio response Reynolds number riser Sarpkaya seabed second-order ship simulation small forward solitary wave solution spectral spectrum stiffness surge tank tanker tension tether theory transverse values vector velocity potential vertical vessel vibration vortex vortices water depth wave drift damping wave forces wave height wave profile