Ship-borne waves

The aim of the course is for students to familiarise themselves with procedures and knowledge required for ship-borne waves modeling.

The students should obtain skills and knowledge to independently research and solve state-of-the-art problems on ship-borne waves related problems, using the available techniques and literature.

Calculation of the ship resistance created by ship waves is one of the most important, but also the most difficult tasks of ship hydrodynamics. Within the Master's course Ship resistance, some simplified methods of this calculation are given, but (due to complexity) the theory of ship waves is not delved deeper. In the subject Ship-borne waves, this area is discussed in detail. The linear theory is studied and the relationship between wave amplitude and ship resistance is given. Ship waves in deep and shallow water are studied, and appropriate formulas for narrow ship resistance are derived (Michell's integral, Sretensky's integral). An introduction to the non-linear theory of ship waves is given, as well as the case of a ship's hull of arbitrary shape.

Calculation of the resistance of a thin ship using the Michell-Sretensky integral. Modeling of incompressible, potential flow for application in ship hydrodynamics. Determination of ship resistance using numerical fluid mechanics.

There are no special requirements for attendance.

Милан Хофман, "Прилог одређивању отпора тела у случају кретања у близини слободне површине", PhD thesis, 1986. Scientific papers, experimental data and comercial software and programming languages.

Total assigned hours: 65

New material: 50
Elaboration and examples (recapitulation): 0

Auditory exercises: 0
Laboratory exercises: 0
Calculation tasks: 0
Seminar paper: 0
Project: 0
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 0
Review and grading of seminar papers: 10
Review and grading of the project: 0
Test: 0
Test: 0
Final exam: 5

Activity during lectures: 0
Test/test: 0
Laboratory practice: 0
Calculation tasks: 0
Seminar paper: 70
Project: 0
Final exam: 30
Requirement for taking the exam (required number of points): 35

J.N. Newman "Marine Hydrodynamics", The MIT Press,1992; J. Wehausen "The Wave Wave Resistance of Ships", Advances in Applied Mechanics, 13, 1973; М. Хофман и Д. Радојчић "Отпор и пропулзија брзих бродова у плиткој води", Машински факултет, Београд 1996; O.M. Faltinsen, "Hydrodynamics of High-Speed Marine Vheicles", Cambridge University Press, 2005; Hess, J. L., Smith, A. M., Calculation of non-lifting potential flow about arbitrary three-dimensional bodies, Report No. ES-40622, Douglas Aircraft Co Long Beach CA, 1962