Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9, Part 2American Society of Mechanical Engineers, 1990 - Arctic regions |
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Page 47
TABLE 4 VARIABLE BIASES AND COVS Variable Loads Dead Bias COV 1.0 0.08 - Live 1.0 0.14 - Environ . ( wave ) 0.7 0.37 ... Table 3.14 of PRAC 85-22 and Table 2.3 of PRAC 87-22 after intro- ducing a yield stress bias of 1.05 for λ = 1.2 and ...
TABLE 4 VARIABLE BIASES AND COVS Variable Loads Dead Bias COV 1.0 0.08 - Live 1.0 0.14 - Environ . ( wave ) 0.7 0.37 ... Table 3.14 of PRAC 85-22 and Table 2.3 of PRAC 87-22 after intro- ducing a yield stress bias of 1.05 for λ = 1.2 and ...
Page 78
... Tables 3 -5 . Table 3 : Results for TLP design Number of Inspection times Thickness Expected ( years ) cost inspections No. 1 No. 2 ( mm ) 1 2 18 33 14 22 30 ( MNOK ) 1.84 1.10 The cost optimum design for the TLP is thus two inspections ...
... Tables 3 -5 . Table 3 : Results for TLP design Number of Inspection times Thickness Expected ( years ) cost inspections No. 1 No. 2 ( mm ) 1 2 18 33 14 22 30 ( MNOK ) 1.84 1.10 The cost optimum design for the TLP is thus two inspections ...
Page 218
... Tables 2 and 3. Table 2 also include the characteristic values . Major contributions to the variance of the limit state function M were found to be ( a ? ) : Environmental load Material toughness 13 % 50 % Defect depth Secondary stress ...
... Tables 2 and 3. Table 2 also include the characteristic values . Major contributions to the variance of the limit state function M were found to be ( a ? ) : Environmental load Material toughness 13 % 50 % Defect depth Secondary stress ...
Contents
Investigation of the Ergodicity Assumption for Sea States in the Reliability Assessment of Offshore | 1 |
OFFSHORE TECHNOLOGY PART | 19 |
Fatigue Loading | 33 |
Copyright | |
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analysis applied approach approximately assessment assumed average basic calculated coefficient component computed considered constant corresponding cost crack growth curve cycles damage defect density depends depth derived described determined developed deviation distribution drag effects Engineering equation equivalent estimated evaluated example expected extreme factor failure failure probability fatigue Figure force fracture frequency function geometry given important included increase indicated initial inspection integration joints limit linear load Lognormal material maximum mean measured mechanics method normal obtained offshore structures operation parameters performed period platform predicted present pressure probabilistic probability procedure random variable range ratio reference relative reliability represent requirements respectively response risk safety shown shows significant simulation standard statistical storm strength stress structure surface Table tension tether tubular uncertainty variables variation wave wave height weld