Date of Award

6-18-2015

Document Type

Thesis

Degree Name

Master of Science in Aeronautical Engineering

Department

Department of Aeronautics and Astronautics

First Advisor

Anthony N. Palazotto, PhD.

Abstract

Piezoelectric actuated shaker tables are often used for high frequency fatigue testing. Since natural frequencies can appear in the operating range of these shaker tables, it is necessary to conduct modal characterization of the system before testing. This thesis describes the design and experimental validation of a mechanical model used for modal analysis of a piezoelectric shaker table. A commercially available three-dimensional scanning device was used to produce a point cloud model of the surface geometry, which was converted to a solid model and imported into a Finite Element Analysis (FEA) package for modal analysis. Using a laser vibrometer to measure displacement and velocity, the physical vibration response of the shaker table was obtained for comparison with FEA frequency response results. The laser vibrometer data was used to validate and tune the FEA modal response.

AFIT Designator

AFIT-ENY-MS-15-J-001

DTIC Accession Number

ADA625944

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