RésuméL'article se concentre sur l'effet des bio-salissures marines sur les efforts hydrodynamiques sur des structures offshore de type Jacket. Dans un contexte de fiabilité des structures, une modélisation probabiliste des coefficients de traînée du modèle de Morison est présentée. Elle est basée sur le conditionnement aux variables de houle, via les paramètres Kc et Re. Une illustration est basée surune colonisation par des moules et une étude en situation de tempête en mer du Nord. AbstractStructural response to extreme events or fatigue loading and structural integrity are major criteria to be quantified in a rational process of reassessment for offshore structures. It is now well established that the probabilistic mechanics approach gives an efficient means for measuring the relative changing in safety level compared to a predefined requirement. This paper proposes a probabilistic modelling of marine growth effects based on both Response Surface Methodology and the panel of available tests in laboratory. This method is here suggested to condition hydrodynamics coefficient to particle kinematics field.
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