Coursecode: mt812
Coursename: Introduction vibration and noise in ships.

DUT creditpoints: 1
ECTS creditpoints: 2

Faculty of Mechanical Engineering and Marine Technology.

Lecturer(s): Boon, prof.ir. B.

Tel.: 015-2784538

Catalog data:
Ship vibrations, noise, measuring of vibrations, design philosophy, propeller excitation, vibration modes.

Courseyear: 3
Semester: 0/2/0/0/0
Hours p/w: 3
Other hours: -
Assessment: Written
Assessm.period(s): 2, 3
(see academic calendar)

Prerequisites: mt827, mt110, mt111, mt214, mt211, mt511.

Follow up: mt814, mt212, mt213, mt515.

Detailed description of topics:

General vibration theory is introduced and applied to the ship as a slender beam. Solutions for the first and higher mode vibrations are presented. Excitation is by internal sources (main engine), the propeller as well as wave action. A description is given of the added mass of the surrounding water. Measuring vibrations and interpretation of the results is described. Noise, sources of noise, transmission routes and criteria for acceptance of noise levels. Inclusion of noise and vibration considerations on the design of the vessel.

Course material:

Lecture notes

References from literature:

  • "Noise, vibration and shock on board ships", 16th WEGEMT Graduate School, Genoa, 1992.

  • Pettersen, J.W.E. (ed.), Storm, J.Fr. (ed.): "Noise control in ships", Oslo 1975, ISBN 82-7174-071-7.

  • "Vibration control in ships", Oslo 1985, ISBN 82-515-0090-7.

Remarks (specific information about assesment, entry requirements, etc.):

Goals:

The course aims to give the students understanding of the importance of vibrations and noise on board ships, the sources of noise and vibrations and the means to reduce the effect. Also they learn how to measure noise and vibration and how to interpret the results. They are taught how to include the impact of noise and vibration in the design.

Computer use:

Laboratory project(s):

Part of the laboratory experiments mt 823P is measuring vibrations of a cantilevered beam with varying end mass and the vibration behaviour of a beam in air and in water.

Design content:

The impact of noise and vibration considerations on ship design is part of the course.

Percentage of design: 25%