• inspection planning of fixed offshore platforms using second-order third-moment fatigue reliability

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     the awareness of fatigue degradation in metallic structures started in the mid 19th century with the occurrence of fatigue failures in the railway industry. in later years, fatigue failure of pentagon-type semi-submersible “alexander l. kielland" platform, caused an increased focus on fatigue problems in the offshore industry. a detailed theoretical background for fatigue analysis is given by almar-naess 1985, gurney 1979, maddox 1991, suresh 1991 and dover & madhav rao 1996. more recently, fatigue crack growth has been studied by among others, lassen 1997.considering irregular nature of the sea environment, and different uncertainties involved in dimensions of structural members, evaluation of stress concentration factors in welded joints, possible dynamic effects and etc., usually a probabilistic method is used to analyze offshore structures. details of the structural reliability theory can be referred to ang and tang 1984, thoft & baker 1982, madsen 1986, schnerder 1997 and mulches 1999.

     

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