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 25
TABLE 1 : Description of Random Variables Un NORMAL α LOGNORMAL LOGNORMAL LOGNORMAL LOGNORMAL Case Study μ μ σ σ μ a Base case- -GOM 12.65 3.79 0.4296 0.1203 1.0 0 150 67.5 0.88 0.30 Case 1 - GOM 12.65 0 0.4296 0 1.0 0 150 0 0.88 0 Case ...
TABLE 1 : Description of Random Variables Un NORMAL α LOGNORMAL LOGNORMAL LOGNORMAL LOGNORMAL Case Study μ μ σ σ μ a Base case- -GOM 12.65 3.79 0.4296 0.1203 1.0 0 150 67.5 0.88 0.30 Case 1 - GOM 12.65 0 0.4296 0 1.0 0 150 0 0.88 0 Case ...
Page 26
... Lognormal : -concave upwards Case 2- GOM 198 0.95 17 0.92 Lognormal : -concave upwards Case 3- GOM 226 0.82 19 19 0.78 Lognormal : -concave upwards Case 4 - GOM 372 0.69 31 0.68 1 Lognormal : -concave upwards Case 5- GOM 108 1.07 9.3 ...
... Lognormal : -concave upwards Case 2- GOM 198 0.95 17 0.92 Lognormal : -concave upwards Case 3- GOM 226 0.82 19 19 0.78 Lognormal : -concave upwards Case 4 - GOM 372 0.69 31 0.68 1 Lognormal : -concave upwards Case 5- GOM 108 1.07 9.3 ...
Page 234
... lognormal distribution is used to describe the variable . ( d ) Fatigue crack growth material properties , C and m : A In fracture mechanics applications , fatigue crack growth is described in terms of the Paris ' law , da / dn = C ( AK ) ...
... lognormal distribution is used to describe the variable . ( d ) Fatigue crack growth material properties , C and m : A In fracture mechanics applications , fatigue crack growth is described in terms of the Paris ' law , da / dn = C ( AK ) ...
Contents
Investigation of the Ergodicity Assumption for Sea States in the Reliability Assessment of Offshore | 1 |
OFFSHORE TECHNOLOGY PART | 33 |
Extreme Forces on Large AxiSymmetric Offshore Structures in Directional Seas | 49 |
Copyright | |
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amplitude applied assessment assumed axial basic variables behaviour calculated coefficient component computed considered corrosion cost crack depth crack growth rate CTOD curve defect deterministic drag force effects Engineering environmental equation estimated evaluated extreme failure mode failure probability fatigue crack growth fatigue damage fatigue failure fatigue reliability fatigue strength Figure fracture mechanics fracture toughness frequency Gaussian geometry hindcast initial inspection instability load integration limit state function linear Lognormal LRFD material maxima maximum mean value method nonlinear normal normal distribution North Sea obtained offshore structures parameters platform predicted pressure probabilistic probability density function probability distribution quadratic random variable ratio reliability analysis reliability index residual stresses response risk S-N curve safety sea-state significant wave height simulation spectral standard deviation statistical stochastic storm stress intensity factor stress range Table tension tether tubular joints variation vector weld weldments