Fatigue analysis of plate structures
Frequency domain wave loads are computed by HydroD in case of a voluminous structure (FPSO, semi-submersible, etc.) and Wajac in case of a frame structure. In the latter case a fatigue analysis may be done for a plated deck or topside structure on top of a frame structure, e.g. a jacket. The input to Stofat is wave spectra, wave scatter diagrams and wave direction probabilities. The fatigue analysis is based on the Miner’s rule.