OVERVIEW

The course provides basic knowledge of naval construction, with particular attention to recreational boating. Set on the same basis as the analogous Naval Construction A course in Nautical Engineering, it is mainly focused on wooden and fiberglass boats, with brief references also to steel and light alloy.

AIMS AND CONTENT

LEARNING OUTCOMES

The aim of the module is to illustrate to the student the most significant aspects concerning naval structures with particular regard to recreational boating.

AIMS AND LEARNING OUTCOMES

The first part of the course is introductory to the knowledge of the naval world in general and aims to make the student acquire the traditional and modern nomenclature in both the technical and regulatory sectors.

In the second part of the course, all the materials for naval construction and the related experimental tests for their characterization are presented.

In the third part, the typical structural typologies for the four materials treated, wood, steel, light aluminum alloy and fiberglass, are presented. In this phase, the student must practice and develop the manual drawing technique to the best of his ability, an activity that is still necessary to quickly and effectively illustrate the structural solutions to colleagues and workers.

PREREQUISITES

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SYLLABUS/CONTENT

The course program is divided into five sequential parts.

First part: the first part of the course presents the preparatory bases for the topic of naval construction and the fundamental nomenclature of the sector, complex but fundamental in the profession of naval and nautical engineer.

Subdivision of the vessel into three main categories: merchant, military and pleasure vessels. Classification based on the type of propulsion and construction material. Presentation of the naval regulatory framework, the interested and supervisory bodies and main regulations: Classification Society, IMO, SOLAS, MARPOL, Free Board.

General definitions and components of the hull. Main dimensions and characteristic shape coefficients. Balance to translation and rotation: trim of the ship. Internal subdivision of the hull volumes: bulkheads, decks and superstructures. Displacement: unladen and dry ship, deadweight, net capacity, tonnage. Subdivision of the displacement into elementary weights. Types of project: of feasibility, preliminary, contractual and constructive.

After a brief review of the naval typologies in general, pleasure boats are classified and described: motor boats (motorboats, semi-cabin boats, cabin boats, open, offshore, sport fisherman), sailing boats (cutter, sloop, yawl, ketch) and with mixed propulsion system, displacement boats, planing boats and semi-displacement boats.

Second part: in the second part of the course the main materials for naval construction are described and some basic elements of structural dimensioning are provided.

Principles of structural analysis: main stress characteristics (normal stress, bending, shear and torsion). Tests on materials and physical-mechanical characteristics of materials for naval construction. Table with the costs of raw materials and of the material used. Types of beams and their dimensional indication in the drawing.

Structural strength: loads acting on the ship, primary, secondary and tertiary stresses. Strength longitudinal, transverse and local.

Hull structural typology: hulls with transverse, longitudinal and mixed structure with relative nomenclature. Conventional line types for naval design and their meaning and use.

Classification of pleasure boats: displacement, planing and semi-displacement boats. Motor boats (motorboats, semi-cabin boats, cabin boats, open, offshore, sport fisherman), sailing boats (cutter, sloop, yawl, ketch) and with mixed propulsion system.

Third part: the fourth part of the program is dedicated to wooden nautical constructions.

Subdivision of pleasure boats according to the construction material. Physical-mechanical characteristics of wood: anisotropy and inhomogeneity of wood. Types of essences and their characteristics. Laboratory tests for determining mechanical characteristics. Structural layout and drawings of pleasure boats in solid wood, plywood and laminated wood. Types of glues and paints protective.

Third part: the third part is dedicated to a brief illustration of the construction and structural characteristics of steel ships.

General principles of welding, with particular reference to the preparation of the sheets and related symbols. Welding discharges and resulting hull details. Automatic welding, TIG and MIG aluminum welding.

Illustration of the structural components of a generic steel ship. Structures of the bottom, sides and deck. Transverse watertight bulkheads with uprights, crosspieces and corrugated. Bow and stern structures. Development of the planking.

Fifth part (II semester): the fifth part of the program is dedicated to nautical constructions in composite materials.

Definition of composite material. Powdery and fibrous reinforcements. Description of the types of reinforcements and resins. Catalysts, accelerators, retarders. Gelcoat. Polymerization process of a laminate. Mechanics of the transmission of stress between resin and reinforcements. Calculation of mechanical characteristics, theory of lamination. Percentage of impregnation of reinforcements based on the type of support. Lamination methods: manual and spray. Lamination table of a fiberglass hull. Construction site equipment: molds, systems for the extraction of polymerization vapors. Advanced lamination methods: vacuum lamination using nylon bag, infusion.

RECOMMENDED READING/BIBLIOGRAPHY

D.Boote, “Elements of Naval Construction”, Course Notes, Faculty of Architecture, Genoa 1991. Various Authors, Ship Design and Construction, SNAME, Ed. 2003. Various Authors, Principles of Naval Architecture, SNAME, Ed. 1989

TEACHERS AND EXAM BOARD

LESSONS

LESSONS START

The course lessons are held in the first semester, as per the academic calendar.

Class schedule

The timetable for this course is available here: Portale EasyAcademy

EXAMS

EXAM DESCRIPTION

Written, Oral