Spectral fatigue damage calculation in the side shells of ships, with due account taken of the effect of alternating wet and dry areas

摘要: Abstract A method for calculating the wave load induced fatigue damage in ship side shells connections between longitudinals and transverse web frames is presented. The based on Miner–Palmgren formulation a spectral approach used to determine necessary variances of stress processes. traditional linear frequency domain analysis expanded order incorporate non-linear nature external water pressure. pressure process determined by use RAOs, not as previously relative motion RAOs. Effects combinations are included method, both global vertical horizontal hull girder bending combined with local process. proposed analyze double tanker, results show reasonable agreement published other authors. shown be significant, especially it confirmed that very important include accounts majority calculated damage.