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SD3705 High-speed Craft Structural Design 6.0 credits

Dimensionering av snabba fartyg

A ride with a planing craft in rough seas can be a spectacular experience. High speed also implies large and complex hydrodynamic impact forces and large inertia loads. The craft hull must be strong and stiff enough to carry these loads, still light enough to make the craft efficient from point of view of building cost, load capacity, operational cost, powering, environmental influence, etc. Hence, high-speed craft structural design involves great challenges! This course aims at giving an understanding of the design process for high-speed craft structures, i.e. complex structures with high demands on structural safety and weight optimization. The course give you the possibility to apply your previous knowledge in structure mechanics in a real design scenario, and thereby deepen your theoretical understanding by putting it in a practical context. You will also get the opportunity to develop a design tool for modelling of the principal hydrodynamic performance for planing craft, which is needed as input to the structural design process. The main focus is on high-speed craft and on how to master the above described challenges in high-speed craft structural design. However, many of the treated aspects are general also for other kinds of structures, and the course should therefore also be of interest for participants from fields other than naval architecture.

  • Educational level

    Third cycle

  • Academic level (A-D)

    D

  • Subject area

  • Grade scale

    P, F

Course offerings

Autumn 12 for programme students

Autumn 13 for programme students

Information for research students about course offerings

Given autumn 2011 next time.

Learning outcomes

The learning objectives are that you after finishing the course should be able to:
1)  describe the functions of and interaction between the different hull structural components in a high-speed craft structure,
2) describe the principal characteristics for different material concepts, such as sandwich, composite single skin and metals, and the differences in structural arrangement between different concepts,
3) describe the loads a high speed craft is subjected to,
4) describe background and principles for the semi-empirical methods for modelling of principal hydrodynamic characteristics for high-speed craft, and apply these methods to analyse running trim, running draught, drag, speed, and structural design loads,
5) apply basic structural mechanics such as beam and plate theory, to analyse high-speed craft structure components,
6) describe the purpose and principles of structure standard codes such as the classification society rules,
7) describe the different criteria which might rule the design of a high-speed craft structure,
8) make a preliminary structural design for a high-speed craft based on semi-empirical methods and classification rule requirements,
9) make complementary direct calculations on certain parts of a hull structure,
10) evaluate the efficiency of a structural design concerning for example ruling criteria, weight, building cost, maintenance cost, operational cost, and environmental influence.

Course main content

The course is problem based where you develop towards the learning objectives by working with design of the complete hull structure for a particular high-speed craft. All course participants work with the same craft but with different material concepts, e.g. sandwich, composite single skin, or metals. The design work is supported by a number of seminars, which treats the basic principles of lightweight structures in general and high speed craft hull structures in particular, modelling of the hydrodynamic performance for high-speed craft, design loads, design criteria, design methods and structural standard codes. The seminars are based on a number of articles and parts of the DNV High-Speed and Light Craft classification rules, and discussions around the progress of the structural design work. In the final seminar the different designs are presented, compared and evaluated.

Eligibility

SD2411 Lightweight Structures and FEM or similar.Students taking (or having taken) the course SD2416 Struct ural Optimisation and Sandwich Design and students following the Naval Architecture Master of Science Program have priority.

Literature

The course material is a number of technical articles, some parts of the DNV High-Speed and Light Craft classification rules.

Examination

  • ÖVN1 - Seminars and Report, 6.0 credits, grade scale: P, F

Examination is done through active participation in the seminars, including literature reviews and other preparation and deliveries and a final report.

Offered by

SCI/Aeronautical and Vehicle Engineering

Examiner

Anders Rosén (AR), 0702-580210, aro@kth.se

Version

Course plan valid from: Spring 09.
Examination information valid from: Spring 08.