Module Catalogue 2024/25

Pre Requisite Comment

N/A

Co Requisite Comment

N/A

Aims

•       Physical model testing, full-scale trials and empirical methods used in relation to ship powering
problem.
•       The methods adopted for estimating the resistance, performing basic propeller design and prediction the
power requirements in the preliminary design stage.
•       Introduce the fundamental concept of ship manoeuvring in calm, deep water including the form of the
equations of motion, typical nomenclature and regulatory issues.
•       Introduce the fundamental concepts of seakeeping including motion of a floating body subject to regular
and irregular waves.
•       Introduce the fundamental concepts of added mass and fluid damping and consider method of obtain the
necessary terms using experimental and empirical methods.
•       Consider motion response including likely displaced position, velocity and/or accelerations, in terms of
probability formula.

Outline Of Syllabus

Marine Propulsion: propulsor types and screw propellers including propeller geometry and other definitions; Introduction to Propeller design, design diagrams and analysis; Introduction to propeller model tests including open water tests; Propeller-hull interaction phenomenon; Powering and performance prediction; Self propulsion tests; Cavitation and Cavitation tunnel test demonstrations.

Ship Manoeuvring: IMO Regulations. Manoeuvering criteria and equations of motion; hydrodynamics forces, moment and manoeuvring derivatives; Nomoto and simple KT equations of motion; the nature of derivatives; low aspects ratio wing analogy; slender body theory; directional stability and control; turning ability.

Ship Seakeeping: the 6 degrees-of-freedom systems; description of regular waves; derivation of the equations of motion. Introduction to motion of floating bodies in regular waves including the concepts of added mass, fluid damping, restoring forces and wave excitation forces. Introduction to irregular waves and ocean wave statistic. Introduction to strip theory and seakeeping experiments. Development of the translation motion (heave) predictions and introduction to rotation motions including pitching and rolling motion. Introduction to various types of seakeeping event and the probability of an even occurring, including: the normal probability density function; significant amplitudes; joint probabilities.

Intended Knowledge Outcomes

IKO1: Produce the basic design of a propeller (using theoretical, experimental and empirical techniques) and calculate its performance characteristics (C1, C2)
IKO3: Calculate the overall power requirement in the preliminary design stage including prime mover (engine) selection (C1, C2, C3, C6)
IKO2: Perform basic powering performance analysis including full-scale trials. (C2, C3)
IKO3: Apply manoeuvering criteria and IMO regulations and analyse the maneuverability and directional stability of a ship. (C1, C2, C3, C6)
IKO4: Understand and describe wave kinamatics in regular and irregular waves; (C1)
IKO5. Analyse wave induced motion in regular and random seas; (C1, C2, C3)
IKO6. Derive and analyse dynamic motion equations in terms of probable motions. (C1, C2, C3)

Intended Skill Outcomes

ISO1: To carry out the basic design and analysis of a propeller and to select a prime mover. (C1, C2, C3)
ISO2: To analyse related power prediction and performance analysis results. (C1, C2, C3, C6
)
ISO3: To assess manoeuvering characteristics of ship and predict turning ability and course-keeping qualities of a given ship design. (C1, C2, C3, C6)
ISO4: To predict the wave and motion induced forces acting on a ship hull; (C1, C2, C3)
ISO5. To calculate natural heave, pitch and roll frequencies as well as heave, pitch and
roll motion parameters of ship in random waves. (C1, C2, C3, C5, C6)

Teaching Rationale And Relationship

Lectures in the class or laboratory provide the students with general understanding of and familiarity with the fundamentals of the overall resistance and powering problem.
Example classes and coursework help the students to develop the associated skills required for the solution of the resistance and powering problem. Practicals provide the students with the opportunity to participate in experiments carried out in the towing tank and/or the cavitation tunnel. The subject of resistance and propulsion of marine vehicles is very broad, dynamics and diverse. Guided private study allows the student to read various classic books and the state-of-the-art papers more and catch-up with the latest developments in this attractive topic to encourage and develop their enthusiasm. The lectures are designed to assist students in the acquisition of a knowledge base that will facilitate understanding of concepts and detailed analysis methods. The tutorial sessions are supervised activities in which the students apply the knowledge that they gain during formal lectures and private study to predict the seakeeping, manoeuvring and course keeping characteristics of a ship.

Assessment Rationale And Relationship

The written examination allows the students to demonstrate their understanding of the subject as well as to demonstrate their problem solving skills through short subject specific problems, under time pressure as required in industry. They are assessed on their ability to apply the learnt knowledge to various scenarios. (IKO1-3, ISO1-3).

Coursework accessed the ability of the students evaluate an overall 1DoF ship seakeeping problem, to solve and to report it using taught skills by referring to much wider resources and communicating with others as in a "real design" case. (IKO4-6, ISO4,5).

General Notes

N/A