## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2American Society of Mechanical Engineers, 2001 - Arctic regions |

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Page 109

5 - Natural mode shapes of the

structural and environmental sources . All uncertainties in structural transfer

functions are considered in the structural source . Uncertainties in the wave

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5 - Natural mode shapes of the

**example**structure The first category involves instructural and environmental sources . All uncertainties in structural transfer

functions are considered in the structural source . Uncertainties in the wave

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Page 113

of the effect of the crack shape and loading type on the K calibration and Fig .

**Examples**of this are shown in Fig . 3 , where the ... Comparisons of variables An**example**of the bar graph format is given in Fig . 4. For this ... 5 shows an**example**of the effect of the crack shape and loading type on the K calibration and Fig .

Page 206

Table 2 Statistical Properties of

Value C.O.V X Lognormal 1.0 0.5 X2 Exponential 1.0 0.5 Gamma 1.0 0.5 Min .

Type I 1.0 0.5 X Min . Type III 1.0 0.5 Max . Type I 1.0 0.5 X Х , Max . Type II 1.0

0.5 ...

Table 2 Statistical Properties of

**Example**1 Random Variable Distribution MeanValue C.O.V X Lognormal 1.0 0.5 X2 Exponential 1.0 0.5 Gamma 1.0 0.5 Min .

Type I 1.0 0.5 X Min . Type III 1.0 0.5 Max . Type I 1.0 0.5 X Х , Max . Type II 1.0

0.5 ...

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acceptable analysis applied approach assessment associated assumed calculated coefficient combined components considered corresponding corrosion cost crack criteria damage dependent depth determined developed directional distribution dynamic effect element Engineering environmental equation estimate evaluated example expressed extreme factor failure fatigue Figure force frequency function fuzzy given important increase initial inspection limit load loss maintenance marine maximum mean measures Mechanics method motion normal observed obtained offshore operations parameters peak performed period pipe pipeline platform possible prediction present probability procedure production random range relative reliability represented response return period riser risk safety ship shown shows significant simulation spectral spectrum statistical steel storm strength stress structure surface Table theory typical uncertainty variables wave height wind