Module Catalogue 2024/25

Pre Requisite Comment

N/A

Co Requisite Comment

N/A

Aims

A1 - To increase awareness of structural behaviour and to develop advanced structural and material concepts.
A2 - To design plates and stiffened panels.
A3 - To develop the knowledge and skills to undertake elastic and plastic response analysis of stiffened plate
structures.
A4 - To gain the knowledge and understanding of finite elements applied to marine structures.
A5 - To address theoretical and practical aspects of structural response analysis in the marine field.
A6 - To develop the working knowledge and skills to undertake finite element analysis for marine structures

Outline Of Syllabus

This module covers the following topics: grillages, plate behaviour under lateral pressure or in-plate compression, structural dynamics. Frames and grillages are introduced to develop knowledge and skills to analyse elastic and plastic responses of stiffened plate structures. The coverage of elastic plate theory and elasto-plastic plate theory enable the students to deal with plate under lateral pressure. Initial buckling and post buckling of plates and tripping of stiffeners are included for design of plate structure subjected to in-plane compression. Flexural vibration of plates and beams are treated for design of ship structures to avoid vibration..

Elastic responses of grillages; plastic theory and its application to beams and grillages. Elastic plate theory; plate behaviour under lateral pressure.
Elasto-Plastic bending of plate; elastic membrane theory; plate of rupture.
Elastic buckling behaviour of plates; effective width and long plate strength; wide plate strength; interaction equation.
Introduction to structural dynamics; flexural vibration of beams; flexural vibration of plates; design considerations and criteria for limiting vibrations.

Fundamental of both linear and non-linear structural response analysis; ship frame analysis and grillage analysis; structural finite element analysis; formualtions of beam elements, plane stress elements and higher order isoparametric elements; dispalement and shape functions; equivalent nodal loads; beam-bracket compatibility and stiffener-plate compatibility; sub-structure technique; condensation technique structural vibrations

Intended Knowledge Outcomes

On completing this module, students will be able to demonstrate knowledge and understanding to undertake the following:
IKO1 - Discuss requirements of elastic and plastic analysis of grillages.
IKO2 - Discuss shape factors, the upper bound and lower bound theorem on plastic analysis.
IKO3 - State the assumptions of elastic plate theory; bending moment curvature relationship of plate;
relationship between twisting moment and twist in a plate.
IKO4 - Use analytical procedure to solve plate governing equilibrium equation for simple supported plate under
lateral loads; elasto-plastic analysis of plates undergoing large deflections.
IKO5 - Describe plate behaviour under lateral pressure and explain the effects of edge conditions on plate
design.
IKO6 - Use energy method for determination of critical buckling stresses of plates.
IKO7 - Distinguish between initial buckling and collapse of plating under in-plane compression. IKO8 - Comment
on the effective width of plating in relation to long plate strength and wide plate strength.
IKO9 - Discuss the factors affecting ultimate strength of plate.
IKO10 -Comment on design considerations and criteria for plate subjected lateral and in-plate loads. IKO11 -
Explain various sources of structural vibrations and discuss design considerations and limiting criteria
for structural vibrations.
IKO12. Fundamental requirements of structural analysis and evaluation of Stiffness Method and Flexibility Method
in structural analysis.
IKO13. The principles and procedures of finite element analysis.
IKO14. Advantages and drawbacks of different types of finite element.
IKO15. The properties of stiffness matrix.
IKO16. Finite elements such as beam elements, plane stress elements, isoparametric elements IKO17. Displacement
function and its relation to shape function.
IKO18. Beam-bracket compatibility and stiffened panel compatibility.
IKO19. Sub-structural stiffness equations
IKO20. Condensation technique used to establish the stiffness matrix of a vibrated structure with reduced degree
of freedom
IKO21. What kind of stress should be used for strength evaluations
IKO22. The criteria of failure

Intended Skill Outcomes

On completing this module students will be able to:
ISO1 - Carry out elastic response analysis of frames and grillages.
ISO2 - Calculate plastic moment and plastic section modules.
ISO3 - Determine ultimate loads carried by frames and grillages.
ISO4 - Determine thicknesses of plates under lateral pressure to meet various design criteria and evaluate the
maximum pressure sustained.
ISO5 - Calculate critical buckling stresses of plates, stiffener tripping stresses and column buckling stresses
of stiffened panels.
ISO6 - Evaluate longitudinal and transverse compression strengths of plates. ISO7 - Design frame system to avoid
plate buckling.
ISO8 - Design stiffened panels against in-plane compressions.
ISO9 - Calculate deflections of sandwich panels and top-hat stiffened panels due to bending and shear.
ISO10 -Calculate sectional properties and flexural rigidities of panels
ISO11 -Estimate natural frequencies and mode shapes of flexural vibrations of beams and plates.
ISO12 -Design local structures to avoid vibrations.
ISO13 -Have acquired intellectual skills, problem solving skills and IT skills.
ISO14. Carry out finite element analysis for framework structures and plate structures.
ISO15. Established co-ordinate transformation and transform stiffness matrix in local co-ordinate system to that
in a global system
ISO16. Set up and solve global structural stiffness equations
ISO17. Determine nodal displacements, nodal reaction forces and internal forces
ISO18. Derive equivalent nodal loads on beam elements for various load distribution patterns
ISO19. Apply an appropriate numbering scheme to minimise the band-width of global structural stiffness matrix.
ISO20. Determine the displacement function and relate it to nodal displacements.
ISO21. Established the strain-displacement relationship through strain matrix and derive the stress-
displacement relationships and element stiffness matrix
ISO22. Derive shape functions of finite elements
ISO23. Set up the dynamic matrix of a structure under free vibration
ISO24. Calculate the natural mode frequencies and normal mode shapes for free vibration with several degree of
freedom

Teaching Rationale And Relationship

-       Lectures are designed to convey the underlying concepts and knowledge of marine structural design and
analysis (IKO1-IKO22) and the professional skills required to solve structural problems (ISO1-ISO24).
-       Tutorials support the students' self study in reading around the lecture material and learning to solve
marine structural problems posed by the tutorial questions (ISO1-ISO24).
-       Independent study gives time for the students to read recommended references (IKO1-IKO22) and practise
their professional skills (ISO1-ISO24).

Assessment Rationale And Relationship

The timed assessment will assess the breadth of knowledge, understanding and ability to perform related ship strength calculations. This medium also allows students to demonstrate intended learning outcomes across a wide range of topics from the syllabus.

The coursework provides students with the opportunity to demonstrate written communication, teamwork, planning, organisation, initiative, problem solving and acquisition of learned skills.

General Notes

N/A