Design


Michael Schmidt’s Y8 is a good example of how advanced simulations can push the boundaries of yacht engineering


Timeframe for an 80ft Yacht For the structural design of an 80ft yacht, preparing the FE model typically takes seven to 10 days, with the subsequent analysis requiring a similar timeframe.


The Standard FE Analyses Performed At AMS, we conduct a series of standard FE analyses as part of the yacht design process. While the fundamental approach remains similar, some analyses differ between sailing and motor yachts, and additional assessments are performed for specific configurations.


1. Linear Static Analysis (for all yachts)


For every yacht, we carry out a linear static analysis with the FE model in a free-floating condition, meaning:


•The model is unconstrained, in equilibrium under the combined


•In the same conditions, we conduct a buckling check on the deck structure


effects of hydrostatic pressure and applied loads (sail forces, keel, rudder, and rigging)


to verify that it does not enter instability due to the compressive forces induced by hull bending


2. Deck Stiffness Analysis (for all yachts)


For both sailing andmotor yachts, we performa deck stiffness analysis


68 SEAHORSE


to ensure that no areas feel


excessively flexible or soft underfoot when walked on.


3. Specific Analyses For Sailing Yachts


•Hull structure under keel loads: We simulate the yacht heeling at 90°,


•Grounding simulation: The keel impact scenario against the bottom of the sea


analysing the structural response to the keel loads when the boat is knocked down by the wind or waves


is analysed to assess the structural behaviour in case of accidental grounding


4. Local Loads Verification (for all yachts)


For each yacht we analyse local loads, including:


•Sailing yachts: Shrouds, backstay, forestay, inner forestay, mainsheet,


•Motor yachts: Cleats and all other critical local load points


genoa sheet, Code 0 sheet, deck hardware, blocks, and cleats


5. Modal Analysis (when required) A modal analysis is performed, when needed, to check the stiffness of vibration- sensitive structures such as hardtops or other elements prone to oscillation. This structured approach ensures that


every yacht meets the highest standards of structural performance, reliability, and safety before production begins.


From Design to Manufacturing: An investment that Pays Off After the validation phase, where structural elements are confirmed, we proceed with the production drawings. These documents provide a comprehensive blueprint of the entire manufacturing process, detailing:


•Material specifications, including mechanical properties


•Construction details •Weight estimates •Manufacturing methodologies


For each structural component, the laminate stack is meticulously defined. This includes:


•The types of reinforcing fabrics (fibreglass and/or carbon fibre)


•The stacking sequence and orientation of each ply within the composite


•The core material used in sandwich structures


Once the drawing phase is complete, a calculation report is compiled. This document includes:


•All FEA analyses performed


•Traditional structural verification methods required for classification society approvals


This rigorous design-to-manufacturing workflow ensures structural reliability, weight optimisation and production efficiency, delivering a final product


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