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Workload: 60h lecture, seminar

Number of credits: 5

Objectives:

Students acquire knowledge about wave induced loads and motions of floating, submerged or founded offshore structures. They make themseves familiar with methods in linear and non-linear mathematical modelling as well as in experimental methods. They are qualified to elect the most suited methods regarding the respective technical task as well as to apply these methods for hydrodynamic analyses of offshore structures. Students are highly enabled to evaluate and to synthesis results of theoretical and experimental analysis.

Contents:

1. Introduction

Loads and motions of ships and offshore structures –
definition and problems, classification of structures based on
hydrodynamic aspects

2. Marine environment

General assumptions, linear wave theory, statistical
description of waves, wind, current

3. Linear wave-induced loads and motions of floating structures

Regular and irregular waves, added mass, damping forces,
strip theory, resonance frequency, transfer function,
amplification factor, exercises

4. Numerical methods for prediction of linear wave-induced loads and motions of floating structures

2- and 3-dimensional source techniques

5. Introductions into non-linear problems

Applications and exercises

6. Loads due to current and wind

Stationary circulation of circular cylinders and slender
bodies with smooth as well as structured surface

7. Morison’ equation

Basics and scope of application, exercises

Recommended reading:

Clauss, G.; Lehmann, E.; Östergaard, C.: Meerestechnische
Konstruktionen
Valtinsen, O.M.: Sea Loads on Ships and Offshore Structures

Prerequisites:

Lectures: Ship Project and Ship Design: EMSHIP S1-3 (Semester S1), Ship Structures and Ship Production, EMSHIP S1-2 (Semester S1)

Form of exams:

Oral 30 minutes