Coursecode: mt511 d4

Coursename: Ship motions, steering and manoeuvring

DUT creditpoints: 1

ECTS creditpoints: 1,5

Subfaculty of  Mechanical Engineering and Marine Technology

Lecturer(s): Pinkster, prof.dr.ir. J.A

Tel.:  015-27 83598

Catalog data:

Ship motions, steering and manoeuvring

Course year:

2

Period:

0/0/2/0

Hours per week:

2

Other hours:

Assessment:

written

Assessm.period:

3, 4

(see academic calendar)

Prerequisites:

Follow up:

Detailed description of topics:

Ship motions

Waves: linear theory of waves, sea waves, wave spectra. Definitions of motions: System of co-ordinate axes and motion components, harmonic motions. Eulerian equations of motions, mass and mass moment of inertia. Motions in still water: Uncoupled motions, equations of motion, hydrodynamic mass, damping, restoring forces, natural frequencies. Coupled motions: Heave-pitch-surge coupling, sway-yaw-roll coupling. Experiments: Motion decay tests in still water, forced oscillation tests in still water. Motions in regular waves: Heaving spar and rolling ship, hydromechanic forces, equations of motion, frequency response characteristics, experiments and computations. Coupled heave and pitch motions: 2-dimensional hydromechanic forces, influence of forward motion, equations of motion, frequency response, absolute and relative vertical motions, shear forces and bending moments, comparisons between results of experiments and computations.

Steering and Maneuvering

Definitions and terminology. Standard full-scale maneuvering tests: Turning circle test, spiral test, zig-zag maneuver, reversed spiral test, pull-out test, presentation of results. Linearized equations of motion: Linearized Eulerian equations of motion, evaluation of stability , Nomoto’s equations. Model tests: types of experiments, analysis of results, examples. Steering: Equations of motion, blokdiagram of a steered ship, optimization of steering behaviour in waves. Rudders: rudder profiles, rudder forces and moments.

Course material:

Lecture notes:   Ship motions and maneuvering  , Part I   (Ir. J.M.J. Journee and Prof. Dr. Ir. J.A. Pinkster)

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Remarks assesment, entry requirements, etc.):

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Computer use:

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