Publicações

Guedes Soares, C., Garbatov, Y. e Von Selle, H. (2003), “Fatigue Damage Assessment of Ship Structures Based on the Long-Term Distribution of Local Stresses”, International Shipbuilding Progress, Vol. 50, Nº 1-2, pp. 35-55.

The paper addresses the evaluation of the fatigue life of ship structures based on a probabilistic approach that considers the stochastic nature of the ocean environmental loading and the service profile of the ship. The method is based on a linear spectral analysis of the stress range response. The stress range response transfer functions are obtained by using a three-dimensional finite element model. The response process for each short-term sea state is modelled by a Rayleigh distribution. The long-term response period and stress range long-term distribution are then determined and are fitted by a Weibull distribution. The Palmgren-Miner linear cumulative damage model is applied. An example calculation is presented for a tanker and the influence of several scatter diagrams on the fatigue life of structural details is examined.

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