Investigation of Close Proximity Underwater Explosion Effects on a Ship-Like Structure Using the Multi-Material Arbitrary Lagrangian Eulerian Finite Element Method

dc.contributor.authorWebster, Keith Gordonen
dc.contributor.committeechairBrown, Alan J.en
dc.contributor.committeememberNeu, Wayne L.en
dc.contributor.committeememberHughes, Owen F.en
dc.contributor.departmentAerospace and Ocean Engineeringen
dc.date.accessioned2014-03-14T20:31:12Zen
dc.date.adate2007-03-07en
dc.date.available2014-03-14T20:31:12Zen
dc.date.issued2007-01-29en
dc.date.rdate2010-03-07en
dc.date.sdate2007-01-30en
dc.description.abstractThis thesis investigates the characteristics of a close proximity underwater explosion and its effect on a ship-like structure. Finite element model tests are conducted to verify and validate the propagation of a pressure wave generated by an underwater explosion through a fluid medium, and the transmission of the pressure wave in the fluid to a structure using the Multi-Material Arbitrary Lagrangian/Eulerian method. A one dimensional case modeling the detonation of a spherical TNT charge underwater is investigated. Three dimensional cases modeling the detonation of an underwater spherical TNT charge, and US Navy Blast Test cases modeling a shape charge and a circular steel plate, and a shape charge and a Sandwich Plate System (SPS) are also investigated. This thesis provides evidence that existing tools and methodologies have some capability for predicting early-time/close proximity underwater explosion effects, but are insufficient for analyses beyond the arrival of the initial shock wave. This thesis shows that a true infinite boundary condition, a modified Gruneisen equation of state near the charge, and the ability to capture shock without a very small element size is needed in order to provide a sufficient means for predicting early-time/close proximity underwater explosion effects beyond the arrival of the initial shock wave.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-01302007-141530en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01302007-141530/en
dc.identifier.urihttp://hdl.handle.net/10919/31077en
dc.publisherVirginia Techen
dc.relation.haspartKeithGWebster_Thesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectFluid/Structure Interactionen
dc.subjectUNDEXen
dc.subjectSandwich Plate System (SPS)en
dc.subjectUS Navy Blast Testen
dc.subjectMMALEen
dc.subjectProximityen
dc.titleInvestigation of Close Proximity Underwater Explosion Effects on a Ship-Like Structure Using the Multi-Material Arbitrary Lagrangian Eulerian Finite Element Methoden
dc.typeThesisen
thesis.degree.disciplineAerospace and Ocean Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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