On structural design of energy efficient small high-speed craft

Prediction model for the impact response of glass fibre reinforced aluminium foam sandwiches

“…design procedure for designing weight minimized hull structures for smaller high-speed craft was developed by Stenius et al [2]. It was demonstrated by this study that the selection of material concept and the application of an appropriate design procedure enable weight reduction and energy efficient improvement.…”

Rough water performance of lightweight high-speed craft

“…To enable a study of a broader range of speeds and sea states, the two versions are designed for a design acceleration of 4g, in contrast to the original craft, which is designed for 2g. Data for the craft and material properties are taken from Stenius et al, 4 ShipTech 10 and FMV. 11 The craft designs are generated according to the iteration procedure illustrated in the flowchart diagram in Figure 2.…”

“…The operational time range of the original craft is expressed in t = 11.5 h. In step 4, weight-minimized structures in accordance with Det Norske Veritas (DNV) Rules for Classification of High-Speed, Light Craft and Naval Surface Craft are generated based on the principles in Stenius et al, 4 giving the structural mass m struct . In step 5, the total craft mass is calculated as…”

“…1 In life-cycle studies, the craft structural mass has been identified as a primary factor regarding high-speed craft life-cycle cost and environmental impact; for example, see Burman et al 2,3 Other studies have shown significant opportunities to reach lower structural mass using composites instead of aluminium. For example, in Stenius et al, 4 it is shown that the structural mass for the 24-m patrol craft in Figure 1 designed for 2g operation typically is 5 ton if using a carbon fibre sandwich concept and 10 ton if using aluminium, that is, a difference of 50%. By Stenius et al, 4 it is further shown that comparing the two identical craft, except for the hull structure, the composite version would benefit from the lower structural mass in terms of a 13% lower displacement.…”

“…For example, in Stenius et al, 4 it is shown that the structural mass for the 24-m patrol craft in Figure 1 designed for 2g operation typically is 5 ton if using a carbon fibre sandwich concept and 10 ton if using aluminium, that is, a difference of 50%. By Stenius et al, 4 it is further shown that comparing the two identical craft, except for the hull structure, the composite version would benefit from the lower structural mass in terms of a 13% lower displacement. This could, for example, be used to allow for additional payload, systems installations or ballistic protection.…”