Accession Number : ADA625944


Title :   Modal Characterization of a Piezoelectric Shaker Table


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Hodkin, Randall J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a625944.pdf


Report Date : Jun 2015


Pagination or Media Count : 112


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.


Descriptors :   *FATIGUE TESTS(MECHANICS) , *GAS TURBINES , *HIGH FREQUENCY , *MODAL ANALYSIS , *PIEZOELECTRIC MATERIALS , *TURBINE COMPONENTS , COMPUTER AIDED DESIGN , FINITE ELEMENT ANALYSIS , FREQUENCY RESPONSE , RESONANT FREQUENCY , THESES , THREE DIMENSIONAL , VALIDATION , VIBRATION , VIBROMETERS


Subject Categories : Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE