Modal Characterization of a Piezoelectric Shaker Table

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2015
Accession Number
ADA625944

Entities

People

  • Randall J. Hodkin

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Ceramic Materials
  • Composite Materials
  • Computational Science
  • Computers
  • Coordinate Systems
  • Doppler Effect
  • Finite Element Analysis
  • Frequency Shift
  • Mechanical Properties
  • Mechanics
  • Modal Analysis
  • Modulus Of Elasticity
  • Resonant Frequency
  • Test And Evaluation
  • Test Methods
  • Three Dimensional

Readers

  • Acoustical Oceanography.
  • Materials Science (Mechanical Engineering).
  • Software Engineering

Technology Areas

  • Directed Energy