A FINITE CYLINDRICAL SHELL ELEMENT AND THE VIBRATIONS OF A CURVED FAN BLADE.

Abstract

The stiffness and mass matrices for a relatively simple finite cylindrical shell element are presented. The element has 28 degrees of freedom corresponding to the seven generalized coordinates at each corner. All six rigid body modes for the element are adequately represented by this model. The element is used to predict the vibrations of a curved fan blade, and the results are verified experimentally. It is found that a 4 x 4 grid of the finite elements is sufficient to predict the first twelve vibration frequencies for the fan blade to within ten percent. The agreement between experimental and theoretical mode shapes is generally very good. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1968
Accession Number
AD0674242

Entities

People

  • Garry M. Lindberg
  • Mervyn D. Olson

Organizations

  • National Research Council Canada

Tags

DTIC Thesaurus Topics

  • Agreements
  • Blades
  • Blowers
  • Cooling
  • Cooling And Ventilating Equipment
  • Doppler Effect
  • Fan Blades
  • Fans
  • Frequency
  • Frequency Shift
  • Grids
  • Stiffness
  • Vibration

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Structural Dynamics.