## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 3American Society of Mechanical Engineers, 2002 - Arctic regions |

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Page 89

Normal

following equation : S7 = ES ( 16 ) Since S ; " ( i ... is a normal

based on the center limit theorem , that is Si ~ N ( E ( STM ) , o ) ( 17 ) where o is ...

Normal

**distribution**method The equivalent fatigue stress is calculated by thefollowing equation : S7 = ES ( 16 ) Since S ; " ( i ... is a normal

**distribution**variablebased on the center limit theorem , that is Si ~ N ( E ( STM ) , o ) ( 17 ) where o is ...

Page 93

( 41 ) ( 2 ) Estimate the parameters for fatigue life by applying moment method .

For lognormal

) For Weibull

( 41 ) ( 2 ) Estimate the parameters for fatigue life by applying moment method .

For lognormal

**distribution**, we have u = ln N - - 5 | n ( 1 + C ) o ? = In ( 1 + C ) ( 42) For Weibull

**distribution**with 2 parameters , it is required to solve the following ...Page 615

Recho ( 31 ) proposed a method to backtrack the initial defect size

from fatigue experiment results of welded joints by using LEFM and Miner ' s sum

. Palmerg et al ( 61 ) used the concept of equivalent initial flaw size in the ...

Recho ( 31 ) proposed a method to backtrack the initial defect size

**distribution**from fatigue experiment results of welded joints by using LEFM and Miner ' s sum

. Palmerg et al ( 61 ) used the concept of equivalent initial flaw size in the ...

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analysis anchor applied assessment bending calculated carried coating compared composite compressive considered corrosion crack crack growth curve cycles damage defects deformation depth determined developed direction displacement distribution dynamic effect element Engineering equation estimated evaluation factor failure fatigue field Figure finite element flexible fracture function geometry given Grade heat increase initial installation insulation integrity International joint length limit load locations material maximum mean measured mechanical method mooring observed obtained Offshore operation parameters performed pipe plate predicted present pressure problem procedure production properties range reliability represent residual resistance respectively riser rope safety shown shows side simulation solution specimens stage standard steel strain strength stress structure surface Table temperature tensile tension thermal thickness titanium uncertainties variable weld