An evaluation of finite element models of stiffened plates subjected to impulsive loading

Different finite element models are evaluated for two very common structures, a cantilever beam and a stiffened plate, subjected to impulsive loading. For the cantilever beam case, the finite element models are one, two or three dimensional models. Various results from the finite element analyses are compared including with analytical solution and a closed-form approximate solution. For the stiffened plate, the models differ from each other by the way the plate and the stiffeners are modeled. Some of the models are very accurate but require much computational resource, while other models are considerably more economic. The purpose of this study was to decide which model is most appropriate for analyzing a ship deck under slamming conditions. The plate modeled with 4-node shell elements and the stiffeners modeled with 2- node iso-beam elements are shown to yield excellent results while requiring reasonable computational resources. In addition to the evaluation of the finite element models, the thesis presents closed- form approximate solutions for both the cantilever beam and the stiffened panel.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Ocean Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2004

Author dc:creator

• Pedatzur, Omri

Advisor dc:contributor.advisor

• Klaus-Jürgen Bathe.

• Ocean Engineering.
• Mechanical Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/33436

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/33436