Shock induced structural response.
Authors
Gallo, Jose Gonzalo
Subjects
finite element
pressure resolution
radiation boundary condition
failure boundaries
underwater shock
pressure resolution
radiation boundary condition
failure boundaries
underwater shock
Advisors
Newton, R.E.
Date of Issue
1978-03
Date
March 1978
Publisher
Language
en_US
Abstract
An infinitely long, ring-stiffened, submerged, elastic cylinder having uniformly spaced elastic bulkheads is the structure considered. Loading is applied by a plane acoustic shock wave with front parallel to the cylinder axis. Dynamic pressure in the fluid is resolved into a free-field incident part and a scattered part. Structural response and scattered pressure in the surrounding fluid are found using finite element modeling of structure and fluid. Introduction of Fourier series makes the fluid region mathematically two-dimensional. A radiation, or non-reflecting, condition at the outer boundary of the fluid region is shown to give good results. A parametric study is made of effects of shock pulse rise time and duration on structural response. Results are presented as combinations of shock pressure and submergence pressure just sufficient to induce structural failure.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner