Fatigue strength assessment of a 2700 TEU container ship

Abstract

This paper is a continuation of the previous one [1] which contains a procedure for fatigue strength assessment of container ships structures. The procedure takes into account two different levels of fatigue strength assessment: approximate one - based on rules and recommendations of classification societies, and the direct approach based on the long term prediction of wave loads. Both methods are compared with the use of 2700 TEU cellular container ship as an example. The fatigue strength assessment is based on the generalized Wohler curves (S-N curves) for welded and not welded details in corrosive and non-corrosive environment, as well as on the hypothesis of linear fatigue damage summation. The basic S-N curves should be used for the nominal stresses multiplied by the stress concentration factor K.