Combined Finite-Discrete Element Method in 3D Ridge Keel Deformation Simulations

No Thumbnail Available
Journal Title
Journal ISSN
Volume Title
Helsinki University of Technology | Diplomityö
Checking the digitized thesis and permission for publishing
Instructions for the author
Date
2005
Major/Subject
Lujuusoppi
Mcode
Kul-49
Degree programme
Language
en
Pages
77
Series
Abstract
In this thesis, the applicability of the combined finite-discrete element method in calculation of ridge keel loads is studied. The aim of this thesis is to implement a combined finite-discrete element method application for studying the mechanics of ridge keels and to use example cases to demonstrate the usability of the application. In this thesis, an introduction to the discrete element method is presented. This is done in order to discuss the differences in the modelling of discontinuum with the discrete element method and the combined finite-discrete element method. In the theory part of the work, first the determination of the contact force and frictional force in the combined finite-discrete element method is presented. After this, the determination of the effect of buoyancy and fluid drag in the combined finite-discrete element method is described. In the en of the theory part, the use of the energetics of a system of discrete elements to measure the accuracy of a combined finite-discrete element method simulation is presented. The examples given in this thesis demonstrate the applicability of the combined finite-discrete element method in the study of the ridge keel loads. The example cases include discussion on the penalty function method and its effect on the ridge keel deformation studies using combined finite-discrete element method. Also in the example cases, three dimensional modelling of ridge keels is discussed.
Description
Supervisor
Tuhkuri, Jukka
Thesis advisor
Tuhkuri, Jukka
Keywords
Other note
Citation