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Comparative Analysis of Metal and Composite Materials for the Primary Structures of a Patrol Craft
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1996
Year
Reinforcement MaterialEngineeringMechanical EngineeringStructural ApplicationMarine EngineeringNaval EngineeringStructural OptimizationStructural SteelStructural EngineeringNaval ArchitectureMetal Matrix CompositeComparative AnalysisShip Structural DesignMaterials ScienceCompositesMechanical DesignDesignStructural DesignStrength Of ShipLife Cycle CostsShip DesignComposite MaterialsPatrol CraftMechanical PerformanceStructural MechanicsConstruction Engineering
ABSTRACT This paper compares composite materials to steel and aluminum to be used for the primary structures of a patrol craft. The process of selecting materials and fabrication techniques is described with consideration given to performance, producibility, ease of fabrication, maintainability, cost and fire resistance. A design optimization is carried out for each structural panel to select the best compromise between cost and weight. An example of a panel, scantlings and frame spacing optimization is described in detail. After carrying out similar optimizations for all parts of the ship structure, a complete structure weight and cost estimate is made and compared for the various materials considered. Several composite material options are examined. The respective hull girder strength and rigidity of the various structures considered are compared and the impact of hull girder bending on shaft bearing loads is described. The overall impact of using different material types is addressed by using whole‐ship design synthesis models to emphasize the importance of structural weight reduction with regard to powering requirements and fuel consumption. Overall ship construction and life cycle costs is also addressed.