Effects of geometric and material imperfections on the dynamic response of cylindrical shells subjected to underwater explosion

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Authors
Kaufman, Robert E.
Subjects
Advisors
Shin, Young S.
Date of Issue
1995-06
Date
June 1995
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The effects of initial geometric and material property imperfections on the non-linear dynamic response of cylindrical shells subjected to an underwater explosion was investigated. Finite element and boundary element programs were used to perform the analysis of the dynamic response of these shells. The geometric and material modal imperfections were introduced into the finite element models. The dynamic response and deformation of the cylinder were then compared for each of the eight modal imperfection cases to the dynamic response of a perfect cylindrical model. The modal imperfection distribution of the combined geometric and material imperfections are then introduced into an aluminum model and compared to experimental results obtained from underwater explosion testing. This analysis shows that a more accurate prediction of the damage and dynamic response is achieved by introducing these imperfection distributions into the numerical analysis.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering and Mechanical Engineer
Organization
Identifiers
NPS Report Number
Sponsors
Funder
NA
Format
104 p.
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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