Ships vibrations
Syllabus
- Fundamentals of oscillation theory: sinusoidal oscillation, damped oscillation, natural frequencies and modeling of measurement data;
- Oscillations in solids: a continuous image on examples of simple beams, with a shape similar to the ship hull in the framework of Euler-Bernoulli theory of beams;
- Oscillation in solids: discrete image and finite element method on examples of simple and more complex forms of beams, with a shape similar to the ship hull in the framework of Euler-Bernoulli theory of beams;
- Propeller as a source of vibration: derivation of basic principles for determining the forces on the propeller that cause vibrational states;
- Propagation of underwater vibrations: derivation of basic principles of sound propagation in water and evaluation of intensity;
- Analysis of ship vibrations: own oscillating modes of the ship's entire structure, hydrodynamic added mass, superstructure vibrations, ship engine vibrations (main and auxiliary), propeller vibrations, propeller cavitation vibrations;
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Goals and competencies
The purpose of the course is to give the basics of ship vibration mechanics. The aim of the course is to develop student for problem-solving skills and critical thinking skills, thus preparing him for understanding and solving problems in the field of ship vibration. Part of the exercises are performed on computers.
Basic literature
- W.S. Vorus, Vibrations, The principles of naval architecture series, SNAME, 2010
- S.S. Rao, Mechanical vibrations in SI Units, Pearson, 2018
- R.E.D. Bishop & V.G. Price, Hydroelasticity of ships, CUP, 1979
- Y. Okumoto et. all, Design of Ship Hull Structures: A Practical Guide for Engineers, Springer, 2009