Otimização de projeto estrutural de lancha patrulha de alumínio

Abstract

The structural design of ships is a laborious task that relies on the rules of classification societies and the experience of designers. Nowadays, with the high demand for cheaper designs that pollute less, there is a clear need to develop a methodology that can analyze the feasibility of a structural design with these objectives more quickly and efficiently. The present work aims to optimize the structural design of an 8.14m long patrol boat in order to minimize the weight and welding volume, using as a basis the rule of the DNV classification society programmed in spreadsheet form and also using optimization software called ModeFrontier. Firstly, five optimization algorithms were tested, with Evolutionary algorithm obtaining the best result with a minimization of -18% in weight and -30% in weld volume.Then it was decided to use DOEs to give the algorithm a better starting point to obtain the final result.This final result was obtained by the MOGA-2 algorithm with a minimization of -19% in weight and -51% in weld volume. The work can serve as a tool to optimize new small patrol boat projects, thus helping to reduce production costs and final weight of the project.