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Loading and structural response models for transverse deflection of circular plates subjected to near field explosions
Descriptive
TypeOfResource
Text
TitleInfo
(ID = T-1)
Title
Loading and structural response models for transverse deflection of circular plates subjected to near field explosions
Identifier
ETD_2779
Identifier
(type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056153
Language
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eng
Genre
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theses
Subject
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Topic
Mechanical and Aerospace Engineering
Subject
(ID = SBJ-2);
(authority = ETD-LCSH)
Topic
Blast effect
Subject
(ID = SBJ-3);
(authority = ETD-LCSH)
Topic
Loads (Mechanics)
Abstract
(type = abstract)
This dissertation develops loading and structural response models to estimate the elastic deformation of a circular plate due to near field explosions. The loading model generates the nonuniform loading characteristic of a near field explosion on a circular plate. This loading model is unique as it uses the TNT equivalence factors for pressure and impulse separately when deriving the pressure profile. Most loading models either average the two factors together or use only one of them. An analytical model and two finite element models were developed to capture the response of the circular plate due to this nonuniform loading. The analytical model utilizes the von Kármán thin plate equations with a new assumed deformation profile developed in this dissertation. The typical deformation profile for a circular plate uses two constants to satisfy the boundary conditions. By adding torsional springs to the boundary of the plate and equating the springs' moment to the plate's internal moment, as well as carrying through with the von Kármán model, a new assumed profile is derived which has one parameter representing the boundary. This allows for a sensitivity analysis to be performed on the boundary condition parameter. In addition, this parameter has physical meaning, as it represents the stiffness of the torsional springs. The two finite element models were created using ANSYS Workbench. One is a simplified model with a constant thickness, circular plate geometry while the other has the actual geometry of the plate used in the experiments. The finite element models were created in a way to allow for the spatial and time dependent pressure loadings to be applied to the proper surface. Four experimental deformation data sets were provided by the U.S. Department of Homeland Security via the Transportation Security Laboratory. Each data set was compared to the analytical model and the two finite element models. The plate center deflection for the three structural models was found to be in good agreement with the experimental data. The results show that the loading becomes less accurate at very small scaled distances. Using the analytical model, the sensitivity of the maximum plate center deflection to parameter changes was estimated. The maximum deflection was found to be most sensitive to plate thickness. In addition, the sensitivity of maximum deflection to parameter uncertainties was calculated for the loading parameters. Depending upon the loading configuration, the greatest sensitivity to maximum deflection was found to depend on the uncertainty of a different parameter. This can be attributed to the highly nonlinear nature of this model.
PhysicalDescription
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electronic resource
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xviii, 95 p. : ill.
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Note
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Ph.D.
Note
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Includes bibliographical references
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Includes vita
Note
(type = statement of responsibility)
by Elan Borenstein
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Borenstein
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Elan
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1979-
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author
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Elan Borenstein
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Benaroya
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Haym
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chair
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Haym Benaroya
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Baruh
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Haim
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internal member
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Advisory Committee
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Haim Baruh
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Dill
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Ellis H
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Ellis H Dill
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Husam
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Advisory Committee
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Husam Najm
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Rutgers University
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degree grantor
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Graduate School - New Brunswick
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school
OriginInfo
DateCreated
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2010
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2010-10
Place
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(type = code)
xx
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Title
Rutgers University Electronic Theses and Dissertations
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ETD
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Title
Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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Identifier
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doi:10.7282/T37M07PB
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ETD doctoral
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Rights
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The author owns the copyright to this work.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
RightsHolder
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(type = personal)
Name
FamilyName
Borenstein
GivenName
Elan
Role
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DateTime
2010-07-12 12:46:12
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Elan Borenstein
Affiliation
Rutgers University. Graduate School - New Brunswick
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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