Simplified finite element modeling of stiffened cylinders subjected to underwater explosion
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Authors
Cunningham, Richard E.
Subjects
Underwater Explosion
Finite Element Method
Smearing Technique
Finite Element Method
Smearing Technique
Advisors
Kwon, Young W.
Date of Issue
1996-03
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Simplified finite element modeling of a stiffened cylinder subjected to underwater explosion was investigated. The use of smearing the stiffeners into the base structure as well as beam modeling using SOR (Surface of Revolution) beam elements were used in the simplification process. The dynamic response and overall global deformation were then compared between the fully discretized stiffened cylinder model and simplified models. The study first examined the effectiveness of smearing stiffeners into a flat plate. The smearing of stiffeners into a cylindrical shell orthotropically was then examined. Next, beam modeling of both unstiffened and stiffened cylinders was investigated. Finally, an integrated beam/shell model of a stiffened cylinder was developed. These models were subjected to the same underwater explosive loading for numerical study. The analysis showed that when comparing the dynamic responses caused by underwater explosions between the discrete model, the beam model, and the beam/shell model of a stiffened or unstiffened cylinder, globally similar results could be produced
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
107 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.