Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides

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dc.contributor.advisorPearce, Howarden_ZA
dc.contributor.authorD'Arcy, Evans Aen_ZA
dc.date.accessioned2016-10-16T09:50:51Z
dc.date.available2016-10-16T09:50:51Z
dc.date.issued1991en_ZA
dc.description.abstractPrevious investigations into the dynamics of skips in deep mine shafts have led to the identification of slamming as a phenomenon that results in exceptionally high forces in the shaft steelwork and conveyance. Slamming may occur when the rollers on the skip, that normally act on the guide, fail. Possible damage caused to the shaft steelwork, as a result of slamming, limits the hoisting speed of the skip. This study extends previous work by investigating the effect of secondary stiffening, due to axial tension effects as the guide deforms, on the slamming response of the skip. A mathematical model of a single slamming event is formulated and a numerical solution procedure presented. A number of computer simulations, including parametric studies, are presented. An important conclusion is that previous slamming models were shown to predict a reduced response when low axial compressive forces are present in the guides while predicting an increased response for high (near the buckling load) axial compressive forces. The inclusion of secondary stiffening; due to axial tension effects, thus represents a significant refinement of the slamming model.en_ZA
dc.identifier.apacitationD'Arcy, E. A. (1991). <i>Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/22159en_ZA
dc.identifier.chicagocitationD'Arcy, Evans A. <i>"Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1991. http://hdl.handle.net/11427/22159en_ZA
dc.identifier.citationD'Arcy, E. 1991. Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - D'Arcy, Evans A AB - Previous investigations into the dynamics of skips in deep mine shafts have led to the identification of slamming as a phenomenon that results in exceptionally high forces in the shaft steelwork and conveyance. Slamming may occur when the rollers on the skip, that normally act on the guide, fail. Possible damage caused to the shaft steelwork, as a result of slamming, limits the hoisting speed of the skip. This study extends previous work by investigating the effect of secondary stiffening, due to axial tension effects as the guide deforms, on the slamming response of the skip. A mathematical model of a single slamming event is formulated and a numerical solution procedure presented. A number of computer simulations, including parametric studies, are presented. An important conclusion is that previous slamming models were shown to predict a reduced response when low axial compressive forces are present in the guides while predicting an increased response for high (near the buckling load) axial compressive forces. The inclusion of secondary stiffening; due to axial tension effects, thus represents a significant refinement of the slamming model. DA - 1991 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1991 T1 - Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides TI - Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides UR - http://hdl.handle.net/11427/22159 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22159
dc.identifier.vancouvercitationD'Arcy EA. Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1991 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22159en_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.titleSlamming analysis of skips in mine shafts: the effect of secondary stiffening in the guidesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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