Nonlinear Aeroelastic Analysis of UAVs: Deterministic and Stochastic Approaches

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dc.contributor.advisorSpanos, Pol D.
dc.contributor.committeeMemberMeade, Andrew J., Jr.
dc.contributor.committeeMemberDick, Andrew J.
dc.creatorSukut, Thomas
dc.date.accessioned2012-09-06T04:32:51Z
dc.date.accessioned2012-09-06T04:32:54Z
dc.date.available2012-09-06T04:32:51Z
dc.date.available2012-09-06T04:32:54Z
dc.date.created2012-05
dc.date.issued2012-09-05
dc.date.submittedMay 2012
dc.date.updated2012-09-06T04:32:54Z
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.
dc.format.mimetypeapplication/pdf
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>.
dc.identifier.slug123456789/ETD-2012-05-155
dc.identifier.urihttps://hdl.handle.net/1911/64686
dc.language.isoeng
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.
dc.subjectNonlinear aeroelasticity
dc.subjectTurbulence
dc.subjectUnmanned aerial vehicle
dc.subjectFlutter
dc.subjectHigh-altitude long-endurance
dc.subjectHarmonic balance
dc.titleNonlinear Aeroelastic Analysis of UAVs: Deterministic and Stochastic Approaches
dc.typeThesis
dc.type.materialText
thesis.degree.departmentMechanical Engineering and Materials Science
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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