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dc.contributor.authorStafne, Michael Allanen_US
dc.date.accessioned2014-03-14T21:52:55Z
dc.date.available2014-03-14T21:52:55Z
dc.date.issued1998-04-21en_US
dc.identifier.otheretd-42298-171056en_US
dc.identifier.urihttp://hdl.handle.net/10919/46492
dc.description.abstractRelatively new transducers permit the measurement of dynamic response at many structure locations. Included among such transducers is the scanning laser Doppler vibrometer (LDV). A scanning LDV can measure velocity at many structure locations. An important new technique, Experimental Spatial Dynamics Modeling (ESDM), utilizes such spatially dense velocity data. ESDM models continuous, three-dimensional velocity fields using LDV velocity data. Thus, ESDM is a powerful structural dynamics analysis tool that significantly enhances the usefulness of a scanning LDV. However, heretofore, ESDM has not been experimentally evaluated. The results contained herein partially satisfy this need. Specifically, this research evaluated the ability of ESDM to reconstruct velocity response fields with large in-plane components parallel to a surface in the presence of small out-of-plane components transverse to the surface. To fulfill this objective, a test structure was developed and fabricated; the structure had certain dynamic properties which aided ESDM evaluation. Subsequently, the test structure was harmonically excited at a single frequency such that large in-plane and small out-of-plane velocity components were present on a particular surface. LDV and accelerometer data were then collected. Ultimately, velocity results were obtained from the LDV data via ESDM and the accelerometer data. Velocity results derived from the accelerometer data served as an experimental standard against which ESDM results were compared. Result comparisons clearly indicate that ESDM accurately reconstructs surface velocity fields with large in-plane and small out-of-plane components.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartAbstract.pdfen_US
dc.relation.haspartInital_Sections.pdfen_US
dc.relation.haspartChapter_1_Introduction.pdfen_US
dc.relation.haspartChapter_2_Literature_Review.pdfen_US
dc.relation.haspartChapter_3_ESDM_Technique.pdfen_US
dc.relation.haspartChapter_4_LDV_Scanner_Calibration.pdfen_US
dc.relation.haspartChapter_5_Test_Structure_Development.pdfen_US
dc.relation.haspartChapter_6_ESDM_Evaluation_Experimental_Method.pdfen_US
dc.relation.haspartChapter_7_ESDM_Evaluation_Experimental_Results.pdfen_US
dc.relation.haspartChapter_8_Conclusion_and_Recommendations.pdfen_US
dc.relation.haspartReferences.pdfen_US
dc.relation.haspartVita.pdfen_US
dc.relation.haspartAppendix.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectstructural dynamicsen_US
dc.subjectlaser Doppler vibrometeren_US
dc.subjectfinite element methoden_US
dc.subjectmodelingen_US
dc.titleAn Experimental Evaluation of the Experimental Spatial Dynamics Modeling (ESDM) Techniqueen_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMechanical Engineeringen_US
dc.contributor.committeechairMitchell, Larry D.en_US
dc.contributor.committeememberWest, Robert L. Jr.en_US
dc.contributor.committeememberKnight, Charles Eugeneen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-42298-171056/en_US
dc.date.sdate1998-04-21en_US
dc.date.rdate1999-05-27
dc.date.adate1998-05-27en_US


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