General considerations about fatigue for a double bottom unit

Abstract

For several decades fatigue cracks and damages have been a problem for the ship designers. Detail design was initially the obvious remedy to improve and solve a part of the fatigue problem given by stainless steels with higher tensile strength used in ship construction parts. The hull and ship deck and also bottom structure are improved with the aim of increasing the strength of hull girder. In the following paper, the fatigue tools results of ANSYS Workbench 16.2 are represented for a double bottom unit model of a Deep Water Installation Vessel.