Local and Global Hydrodynamic Loads on the FPSO Glas Dower for Fatigue Assessment.

摘要

Two studies focusing at the hydrodynamics loading of a FPSO tanker have been carried out. The first study is an analysis of the external wave pressure loading at the side shell of the FPSO 'Glas Dowr' considering the accumulation of fatigue damage. Main attention is paid to the nonlinearity of this load in the splash zone. A frequency domain calculation procedure has been verified by a time domain procedure. The second study focuses on the combination of the local external wave pressure and vertical wave bending induced stresses. Because of the nonlinearity of the local load this is not a straight forward procedure. A simple formula, combining the separately calculated local and global fatigue damages, is presented taking correlation into account.