Flat Plate Vibration Analysis Experimental and Numerical Fillet Study

Abstract

Measurements and predictions of low-order resonant frequencies and mode shapes have been made for three rectangular aluminum plates, each having a different fillet radius at the attached end. Measurements were conducted using a dual-beam laser vibrometer, and predictions were made using the MSC/NASTRAN finite element code. The effects of the fillet radius on the resonant frequencies have been quantified, and a comparison between measured and predicted values is presented. Effects of water loading are also presented. Results show that 1) resonant frequencies increase as the filet radius increases, 2) the predicted resonant frequencies compare favorably with those measured, and 3) water loading reduces the resonant frequencies determined in air. Keywords: Plates; Resonance; Mode shape; Laser vibrometer; NASTRAN; Water loading; Dynamic responses; Physical properties; Structural properties.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1990
Accession Number
ADA218789

Entities

People

  • D. E. Thompson
  • R. D. Cook

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Aluminum
  • Classification
  • Data Acquisition
  • Doppler Effect
  • Dynamic Response
  • Elements
  • Frequency
  • Frequency Shift
  • Instrumentation
  • Lasers
  • Measurement
  • Physical Properties
  • Resonant Frequency
  • Security
  • Vibration
  • Vibrometers

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Optical Physics and Photonics.
  • Structural Dynamics.

Technology Areas

  • Directed Energy