Intact and Damage Stability Metamodels for the Concept Design of Naval Ships

Naval vessel technologies are in continuous development; in recent years, new and increasingly energy-intensive weapon and detection systems, energy storage systems and new configurations of destroyer’s power and propulsion systems introduced new challenges that shall be considered during the ship design since the conceptual stage. They have a very strong impact on the technical and war performances of the vessel during its life-cycle. In this sense, the adoption of modern multi-attribute decision-based methods is essential to successfully cope with a completely new ship prototype during the concept design. Among the constraints to be satisfied in this process, intact and damaged stability is for sure among the most relevant, having a strong impact on ship subdivision and general arrangement. This work describes an approach to assess the compliance of a ship with the intact stability regulations (RINAMIL) based on the ship's main geometrical quantities. Moreover, a metamodel based on the maximum floodable length concept (damage stability) allows for determining the feasibility of the main internal subdivision of the ship. Both the metamodels have been developed considering a database of destroyers that were generated starting from a baseline hull, varying five hull-form parameters using the design of experiment (DoE) technique.