A comparison of geometric imperfection models for collapse analysis of ship-type stiffened plated grillages

The assessment of the buckling and ultimate collapse strength is a mandatory step in limit state design ship structures. analysis ship-type stiffened panels under longitudinal compression highly affected by initial geometric imperfection. Several imperfection models are available literature. Broadly speaking, they can be categorised into deterministic probabilistic approaches. approach describes deflection field with presumed shape characteristic maximum distortion magnitude. shapes commonly adopted, including hungry-horse (HH) mode, Admiralty Research Establishment (ARE) mode critical (CM) mode. Each these used conjunction Except otherwise specified, an average-level magnitude usually applied. By contrast, evaluates as random field, generated based on prescribed statistics. A comparative study presented this light analysing uncertainty compressive plated grillages induced different modelling In addition, influence relative adjacent analysed. Recommendations for choosing model structures reported.