Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 10, Part 2American Society of Mechanical Engineers, 1991 - Arctic regions |
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Page 87
... FUZZY FACTORS IN ESTIMATION OF STRESS DISTRIBUTION 3.1 Fuzzy statistical method Fuzzy statistical method is a very useful tool for the description of estimation error . The fuzzy distribution of an estimated variable may be obtained and ...
... FUZZY FACTORS IN ESTIMATION OF STRESS DISTRIBUTION 3.1 Fuzzy statistical method Fuzzy statistical method is a very useful tool for the description of estimation error . The fuzzy distribution of an estimated variable may be obtained and ...
Page 88
... fuzzy relation matrix R : i R = [ bik ] axp ( 5 ) The 2nd fuzzy evaluation ( 12 ) ( 1 ) First , to determine the long - term distribution of wave height H , that is : H PL ( H ) = 1 - expl- ( CHD ) PL ( H ) = 1 - ( 18 ) The parameters C ...
... fuzzy relation matrix R : i R = [ bik ] axp ( 5 ) The 2nd fuzzy evaluation ( 12 ) ( 1 ) First , to determine the long - term distribution of wave height H , that is : H PL ( H ) = 1 - expl- ( CHD ) PL ( H ) = 1 - ( 18 ) The parameters C ...
Page 89
The fuzzy moments of the stress spectrum are defined as : Equation ( 24 ) is = √on + 51 ( w ) * d w * S . ( 24 ) a fuzzy integral . The fuzzy probabilisty density function of s ; is expressed by the following formula : where f¡ ( s ) ...
The fuzzy moments of the stress spectrum are defined as : Equation ( 24 ) is = √on + 51 ( w ) * d w * S . ( 24 ) a fuzzy integral . The fuzzy probabilisty density function of s ; is expressed by the following formula : where f¡ ( s ) ...
Contents
Spectral Modelling of Sea States With Multiple Wave Systems | 13 |
Statistical and Physical Models of Nonlinear Random Waves | 23 |
Extrapolation of Design Waves in the Gulf of Guineal | 33 |
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amplitude applied approximation assumed bending moment calculated coefficient component computed condition considered correlation corresponding crack growth crack length damage damping defined density function detected deterministic effect element Engineering equation estimated evaluation failure probability Figure fracture mechanics frequency fuzzy Gaussian given hindcast inspection integral joints limit state function linear load lognormal maintenance matrix maximum mean value method nonlinear normal normal distribution obtained offshore structures order statistics parameters partial safety factors plate platform probabilistic probability density probability density function probability of failure procedure random variables redundancy reliability analysis reliability index repair residual stresses response sample seastates shear ship shown significant wave height simulation spectra spectrum standard deviation statistical stiffness storm strength stress range structural reliability surface system reliability Table tendon tension tion transfer function uncertainty updated variation vector vector process vertical wave bending Weibull Weibull distribution welded yield stress