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dc.contributor.advisorVanderplaats, Garret N.
dc.contributor.authorFelix, Jorge E.
dc.dateDecember 1981
dc.date.accessioned2012-11-20T00:17:21Z
dc.date.available2012-11-20T00:17:21Z
dc.date.issued1981
dc.identifier.urihttp://hdl.handle.net/10945/20666
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractThree-dimensional trusses are designed for minimum weight, subject to constraints on: member stresses, Euler buckling, joint displacements and system natural frequencies. Multiple static load conditions are considered. The finite element displacement method of analysis is used and eigenvalues are calculated using the subspace iteration technique. All gradient information is calculated analytically. The design problem is cast as a multi-level numerical optimization problem. The joint coordinates are treated as system variables. For each proposed configuration, the member sizes are updated as a sub-optimization problem. This sub-problem is efficiently solved using approximation concepts in the reciprocal variable space. The multi-level approach is shown to be an effective technique which conveniently takes advantage of the most efficient methods available for the member sizing problem. Examples are presented to demonstrate the method. The optimum configuration is shown to be strongly dependent on the constraints which are imposed on the design. (Author)en_US
dc.description.urihttp://archive.org/details/shapeoptimizatio00feli
dc.language.isoen_US
dc.rightsCopyright is reserved by the Copyright owneren_US
dc.subject.lcshMechanical engineeringen_US
dc.titleShape optimization of trusses subject to strength, displacement, and frequency constraints.en_US
dc.typeThesisen_US
dc.contributor.secondreaderSalinas, David
dc.contributor.corporateNaval Postgraduate School
dc.contributor.departmentNaval Engineering
dc.subject.authorStructural Optimizationen_US
dc.subject.authorFinite elementsen_US
dc.subject.authorStructural Configurationen_US
dc.subject.authorTrussesen_US
dc.subject.authorFrequency Constraintsen_US
dc.description.serviceLieutenant, Ecuadorian Navyen_US
etd.thesisdegree.nameM.S.in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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