Nonlinear Aeroelastic Analysis of UAVs: Deterministic and Stochastic Approaches

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dc.contributor.advisorSpanos, Pol D.en_US
dc.contributor.committeeMemberMeade, Andrew J., Jr.en_US
dc.contributor.committeeMemberDick, Andrew J.en_US
dc.creatorSukut, Thomasen_US
dc.date.accessioned2012-09-06T04:32:51Zen_US
dc.date.accessioned2012-09-06T04:32:54Zen_US
dc.date.available2012-09-06T04:32:51Zen_US
dc.date.available2012-09-06T04:32:54Zen_US
dc.date.created2012-05en_US
dc.date.issued2012-09-05en_US
dc.date.submittedMay 2012en_US
dc.date.updated2012-09-06T04:32:54Zen_US
dc.description.abstractAeroelastic aspects of unmanned aerial vehicles (UAVs) is analyzed by treatment of a typical section containing geometrical nonlinearities. Equations of motion are derived and numerical integration of these equations subject to quasi-steady aerodynamic forcing is performed. Model properties are tailored to a high-altitude long-endurance unmanned aircraft. Harmonic balance approximation is employed based on the steady-state oscillatory response of the aerodynamic forcing. Comparisons are made between time integration results and harmonic balance approximation. Close agreement between forcing and displacement oscillatory frequencies is found. Amplitude agreement is off by a considerable margin. Additionally, stochastic forcing effects are examined. Turbulent flow velocities generated from the von Karman spectrum are applied to the same nonlinear structural model. Similar qualitative behavior is found between quasi-steady and stochastic forcing models illustrating the importance of considering the non-steady nature of atmospheric turbulence when operating near critical flutter velocity.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationSukut, Thomas. "Nonlinear Aeroelastic Analysis of UAVs: Deterministic and Stochastic Approaches." (2012) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/64686">https://hdl.handle.net/1911/64686</a>.en_US
dc.identifier.slug123456789/ETD-2012-05-155en_US
dc.identifier.urihttps://hdl.handle.net/1911/64686en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectNonlinear aeroelasticityen_US
dc.subjectTurbulenceen_US
dc.subjectUnmanned aerial vehicleen_US
dc.subjectFlutteren_US
dc.subjectHigh-altitude long-enduranceen_US
dc.subjectHarmonic balanceen_US
dc.titleNonlinear Aeroelastic Analysis of UAVs: Deterministic and Stochastic Approachesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentMechanical Engineering and Materials Scienceen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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