CONTRIBUTION TO THE SEAKEEPING ANALYSIS OF MULTIHULL WARSHIPS

This paper analyses in the study of the factors that most affect multihull vessels, and thus determine the feasibility of a new class of ships.It focuses on the impact of service requirements (vessels are typically designed and built under national standards that take into account different factors such as strength, stability, buoyancy, etc.) in a way they are able to withstand extreme environmental conditions with minimal damage, essential for correct and responsible operation.In this paper it is compared, in terms of seakeeping prediction, the results of a monohull with a multihull.In recent years there has been a major breakthrough in this area and it should be noted that although a priori, it may seem that such structures have very good seakeeping characteristics and they provide superior operation compared to traditional monohull with equivalent displacement.They also have some disadvantages such as a higher drag because the wetted surface is higher than its equivalent monohull, and a large weight variation due to their low flotation area.Seakeeping optimization and improving on board comfort aspects are both aspects related to the development of reliable numerical tools as well as knowing a good statistical climatological description.It is crucial to conduct preliminary tests using scale models in a canal with the latest technology for wave generation, test instruments and devices for measuring the movements of the ship and the application of operational criteria.This ensures smaller amplitude movements, high coefficient of floating, sterns mirror, less draft, more beam and metacentric height provide the appropriate natural period.