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Modules

Modules

MAR2019 : Ship Hydrodynamics

Semesters
Semester 2 Credit Value: 20
ECTS Credits: 10.0

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 concepts of ship maneuvering in calm, deep water including the form of the equations of motion, typical nomenclature and regulatory issues.
• Introduce the experimental methods used for obtaining motion derivatives and the post processing of obtained data including the derivation of semi-empirical methods.
• Introduce linear analysis for preliminary estimations of performance and operability.
• 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 propulsor types and screw propeller (and overview); Screw propeller; Geometry and other definitions; Propeller design and analysis (an overview); Basic propeller design; Model propeller tests (an overview); Some important non-dimensional parameters; Open water model tests; Standard series model propeller tests; propeller design diagrams; Propeller-hull interaction phenomenon; Powering and performance prediction; Self propulsion tests; Cavitation and Caviatation tunnel test demonstrations; Speed trials.

Standard maneuvers: IMO Regulations. Manoeuvering criteria; equations of motion; hydrodynamics forces and movements; derivatives; simple KT equations of motion; the nature of derivatives; low aspects ratio wing analogy; slender body theory; directional stability and control; turning ability; ship characteristics.
Introduction to the study of ship motions in waves including: 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 methods used for finding the necessary terms including 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 to the probability of an even occurring, including: the normal probability density function; significant amplitudes; joint probabilities.

Teaching Methods

Teaching Activities
Category Activity Number Length Student Hours Comment
Guided Independent StudyAssessment preparation and completion110:0010:00Propulsion Coursework
Guided Independent StudyAssessment preparation and completion124:0024:00Examination Revision
Guided Independent StudyAssessment preparation and completion12:002:00Examination
Guided Independent StudyAssessment preparation and completion110:0010:00Seakeeping Coursework
Scheduled Learning And Teaching ActivitiesLecture481:0048:00N/A
Guided Independent StudyDirected research and reading150:0050:00Consolidating lecture notes and further reading
Scheduled Learning And Teaching ActivitiesPractical42:008:00Computer class
Guided Independent StudyIndependent study148:0048:00General reading and revision
Total200:00
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 Methods

The format of resits will be determined by the Board of Examiners

Exams
Description Length Semester When Set Percentage Comment
Written Examination1802A70N/A
Other Assessment
Description Semester When Set Percentage Comment
Report2M15Taking a maximum of 10 hours
Report2M15Taking a maximum of 10 hours
Assessment Rationale And Relationship

The written examination allows the students to demonstrate their basic knowledge and 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.

Coursework tests the ability of the students to tackle an overall ship powering 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.

The Graduate Skills Framework entries indicated as 'A' are also assessed in this way.

Reading Lists

Timetable