Impulse loading of near-field shallow-buried explosions

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dc.contributor.advisorNurick, Gerald Nen_ZA
dc.contributor.authorBeetge, Frans Jacobusen_ZA
dc.date.accessioned2014-07-31T11:29:09Z
dc.date.available2014-07-31T11:29:09Z
dc.date.issued2008en_ZA
dc.descriptionIncludes bibliographical references (leaves 202-208).
dc.description.abstractPrediction of the total impulse for a mine-protected vehicle must be empirically determined for South African Paardefontein soil pit soil at the start-up phase of a new vehicle project, particularly when experimental data are not yet available for the calibration of computational efforts. The total impulse on a mine-protected vehicle is influenced by a number of factors, such as size of the exposed target area, explosive mass, explosive diameter to height ratio, standoff distance, depth of burial, and soil properties. This investigation entails the development of an empirical equation for predicting total impulse by applying regression analysis. A series of comparative test results were obtained with the Scientific Instrumented Impulse Measurement Apparatus (SIIMA) for TNT equivalent surrogate mines of 2.13 kg - 8 kg mass and diameter to height ratio of 5: 1, and are reported. The lethal aspects of buried mines (target loading mechanisms), such as the detonation shock load, impact load and distributed load, are identified and discussed. Important parameters influencing anti-vehicular blasts, such as standoff distance, soil effects, mine composition and geometry and target shape, are investigated and reported. In conclusion, a SIIMA empirical equation is established which, although limited in standoff distance, can be used as an affordable and quick tool to calculate the vertical impulse on a flat bottom mine-protected vehicle. The SIIMA results show reasonable agreement with the published data of Westine et al (1985) (Braid [1], Williams et al [2] and Williams and Poon [3]), and with the computational predictions provided by the CSIR DPSS-LS. The results provide a better understanding of the complex behaviour of shallow-buried mines in dry sand as an anti-vehicular mine threat, when considering parameters such as standoff distance and depth of burial for constant conditions of explosive aspect ratio (diameter to height values).en_ZA
dc.identifier.apacitationBeetge, F. J. (2008). <i>Impulse loading of near-field shallow-buried explosions</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/5555en_ZA
dc.identifier.chicagocitationBeetge, Frans Jacobus. <i>"Impulse loading of near-field shallow-buried explosions."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2008. http://hdl.handle.net/11427/5555en_ZA
dc.identifier.citationBeetge, F. 2008. Impulse loading of near-field shallow-buried explosions. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Beetge, Frans Jacobus AB - Prediction of the total impulse for a mine-protected vehicle must be empirically determined for South African Paardefontein soil pit soil at the start-up phase of a new vehicle project, particularly when experimental data are not yet available for the calibration of computational efforts. The total impulse on a mine-protected vehicle is influenced by a number of factors, such as size of the exposed target area, explosive mass, explosive diameter to height ratio, standoff distance, depth of burial, and soil properties. This investigation entails the development of an empirical equation for predicting total impulse by applying regression analysis. A series of comparative test results were obtained with the Scientific Instrumented Impulse Measurement Apparatus (SIIMA) for TNT equivalent surrogate mines of 2.13 kg - 8 kg mass and diameter to height ratio of 5: 1, and are reported. The lethal aspects of buried mines (target loading mechanisms), such as the detonation shock load, impact load and distributed load, are identified and discussed. Important parameters influencing anti-vehicular blasts, such as standoff distance, soil effects, mine composition and geometry and target shape, are investigated and reported. In conclusion, a SIIMA empirical equation is established which, although limited in standoff distance, can be used as an affordable and quick tool to calculate the vertical impulse on a flat bottom mine-protected vehicle. The SIIMA results show reasonable agreement with the published data of Westine et al (1985) (Braid [1], Williams et al [2] and Williams and Poon [3]), and with the computational predictions provided by the CSIR DPSS-LS. The results provide a better understanding of the complex behaviour of shallow-buried mines in dry sand as an anti-vehicular mine threat, when considering parameters such as standoff distance and depth of burial for constant conditions of explosive aspect ratio (diameter to height values). DA - 2008 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2008 T1 - Impulse loading of near-field shallow-buried explosions TI - Impulse loading of near-field shallow-buried explosions UR - http://hdl.handle.net/11427/5555 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/5555
dc.identifier.vancouvercitationBeetge FJ. Impulse loading of near-field shallow-buried explosions. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2008 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/5555en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.titleImpulse loading of near-field shallow-buried explosionsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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