ABSTRACT
This chapter outlines a medium-fidelity multihull structural design process which is computationally efficient to allow for exploration of large design spaces while also directly estimating limit states. It describes a general design process for multihull structures which is highly automatable by software and also computationally efficient. The practice for the early-stage structural design of multihulls can be categorized into two broad approaches. One approach uses high-fidelity Finite Element Models of the ship structure from the very beginning, often iterating from a previous design. The second approach uses rules, class society guidelines, and engineering safety factors to protect against loss of life and property. The structural analysis and design approach should allow for the coupled effects of simultaneous loading in both transverse and longitudinal directions which is significant in multihulls. Multihulls in particular are subjected to loads simultaneously in both the longitudinal and transverse directions.
