Coursecode: mt802

Coursename: Structural design and analysis of maritime objects 1

More information: BLACKBOARD

DUT creditpoints: 1,5

ECTS creditpoints: 3

Faculty of  Mechanical Engineering and Marine Technology

Lecturer(s): Vink, ir. J.H.

Tel.:  015-27 85923

Catalog data:

Structural design of ships, Modelling, Loads, Stress trajectories,  Stiffened plates, Connections, Longitudinal strength

Course year:

1

Period:

0/0/0/3

Hours per week:

3

Other hours:

Assessment:

written

Assessm.period:

4, 5

(see academic calendar)

Prerequisites: wb1111mt, mt804, mk6010tu

Follow up: mt803

Detailed description of topics:

The construction of ships and offshore platforms mainly consist of a 3-dimensional configuration of thin stiffened plate panels (decks, shell, transverse- aand longitudinal-bulkheads etc.), while the panels are loaded in their plane as well as laterally.

This course and accompanying instructions give guidance for analysing this kind of complex and highly redundant structures.

By learnig to distinguish a hierarchy in the construction it will be possible to logically classfy the components of the construction based upon their function(s) and to understand the structural concept (-design)

With help of this background, exercises will be made to model parts of the construction in view of strength analysis. Decisions related to relevant loads and boundary conditions for the models are the other essential ingredients for performing response analysis.

This method is also helpful in understanding the principles underlying the formulas in the rules of classification societies and to decide if they are relevant for a particular situation.

Attention is paid to the use of the structural concept in the early design stage as an important tool to find  a good balance between strength, stiffness, weight, material- fabrication- and maintenance-costs.

The analysis of the longitudinal strength of a ship hull, together with the determination of the relevant global loads, is a major component of this course.

Course material: Reader: Structural design and Analysis of Maritime Objects 1, ir. J.H. Vink

References from literature: none

Remarks (assesment, entry requirements, etc.): Written examination

Learning goals: To be able to:

• Understand the structural functions (strength, stiffness) of the components of the ship and platform individually and as part of the total (local, regional or global)
• Understand the principles of bending of plates and to calculate bending stresses for plate panels due to lateral loading
• Break down of the ship structure into models (for components, regions, ship as slender beam) and apply strength analysis for these models using basic principles of applied mechanics; making decisions about modelling aspects as loads, boundary conditions (in view of the interaction with surrounding structure), effective length etc.
• Apply classification rules to determine the scantlings of the components of a ship structure, to understand their background and to know (interpret) their restrictions (when to use or not to use them)
• Recognize different joining techniques (bolting, welding) and to model them in order to calculate their strength using basic principles of applied mechanics
• Understand the impact of fabrication cost, trade-off between strength, weight and initial and maintenance cost and to apply it to simple cases
• Understand the behaviour of plates loaded in their plane in view of stress trajectories, stress concentrations, effective width, shear lag 
• Analyse the longitudinal strength of ship hull girder, including aspects as still water bending moment and shear force distribution for loading conditions, wave bending moment, effective midship section modulus, required section modulus

Computer use: yes

Laboratory project(s): no

Design content: This course gives insight into the relations between the structural concept (-design) and strength plus production aspects.

Percentage of design:  75 %