On the estimation of mooring line characteristic resistance for reliability analysis |
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| Authors: | Roberto Montes-Iturrizaga Ernesto Heredia-Zavoni Francisco Silva-Gonzlez |
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| Institution: | aInstituto Mexicano del Petróleo, Programa de Explotación de Campos en Aguas Profundas, Eje Central Lázaro Cárdenas 152, México DF, 07730, Mexico |
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| Abstract: | The main aim of this work is to derive a correct formulation for the characteristic resistance of a mooring line segment with lognormally distributed component resistances and substitute an equation proposed by Vazquez-Hernandez et al. Vazquez-Hernandez AO, Ellwanger GB, Sagrilo LVS. Reliability-based comparative study for mooring lines design criteria. Appl Ocean Res 2006; 28(6):398–406] in a paper published in this journal, which is not correct. The mooring line is considered as a series system and the resistances of individual components of a line segment are statistically independent and identically distributed; furthermore, the case of normally distributed component resistances is also discussed. A comparison with the corresponding equation proposed by DNV-OS-E301 is given. Results show that the formula proposed by Vazquez-Hernandez et al. Vazquez-Hernandez AO, Ellwanger GB, Sagrilo LVS. Reliability-based comparative study for mooring lines design criteria. Appl Ocean Res 2006; 28(6):398–406] overestimates quite significantly the characteristic resistance of a mooring line segment. |
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| Keywords: | Structural reliability Mooring system Floating structures Characteristic resistance |
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