dc.contributor.author	Stafne, Michael Allan	en
dc.contributor.committeechair	Mitchell, Larry D.	en
dc.contributor.committeemember	West, Robert L. Jr.	en
dc.contributor.committeemember	Knight, Charles E.	en
dc.contributor.department	Mechanical Engineering	en
dc.date.accessioned	2014-03-14T21:52:55Z	en
dc.date.adate	1998-05-27	en
dc.date.available	2014-03-14T21:52:55Z	en
dc.date.issued	1998-04-21	en
dc.date.rdate	1999-05-27	en
dc.date.sdate	1998-04-21	en
dc.description.abstract	Relatively 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
dc.description.degree	Master of Science	en
dc.identifier.other	etd-42298-171056	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-42298-171056/	en
dc.identifier.uri	http://hdl.handle.net/10919/46492	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	Abstract.pdf	en
dc.relation.haspart	Inital_Sections.pdf	en
dc.relation.haspart	Chapter_1_Introduction.pdf	en
dc.relation.haspart	Chapter_2_Literature_Review.pdf	en
dc.relation.haspart	Chapter_3_ESDM_Technique.pdf	en
dc.relation.haspart	Chapter_4_LDV_Scanner_Calibration.pdf	en
dc.relation.haspart	Chapter_5_Test_Structure_Development.pdf	en
dc.relation.haspart	Chapter_6_ESDM_Evaluation_Experimental_Method.pdf	en
dc.relation.haspart	Chapter_7_ESDM_Evaluation_Experimental_Results.pdf	en
dc.relation.haspart	Chapter_8_Conclusion_and_Recommendations.pdf	en
dc.relation.haspart	References.pdf	en
dc.relation.haspart	Vita.pdf	en
dc.relation.haspart	Appendix.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	structural dynamics	en
dc.subject	laser Doppler vibrometer	en
dc.subject	Finite element method	en
dc.subject	Modeling	en
dc.title	An Experimental Evaluation of the Experimental Spatial Dynamics Modeling (ESDM) Technique	en
dc.type	Thesis	en
thesis.degree.discipline	Mechanical Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

An Experimental Evaluation of the Experimental Spatial Dynamics Modeling (ESDM) Technique

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