Bending Flutter and Torsional Flutter of Flexible Hydrofoil Struts

Abstract

A large body of experimental and theoretical flutter results for hydrofoil struts were analyzed to determine significant characteristics. Flutter was found to occur in two different structural mode shapes, corresponding to a predominantly bending mode and a predominantly torsional mode, respectively. The flutter mode shape was related to the vibration mode shapes and the generalized mass ratio of the strut at zero speed. The behavior of the hydroelastic modes of typical struts as a function of speed was investigated by using a strip theory with three-dimensional loading modifications. Flutter predictions for struts which underwent flutter in the torsional mode were usually conservative and predicted the correct mode shape.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1973
Accession Number
AD0757645

Entities

People

  • Peter K. Besch
  • Yuan-ning Liu

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Bodies
  • Cantilever Beams
  • Equations Of Motion
  • Frequency
  • Hydrodynamics
  • Hydrofoil Craft
  • Hydrofoils
  • Leading Edges
  • Measurement
  • Moment Of Inertia
  • Numbers
  • Shape
  • Standing Waves
  • Structural Components
  • Three Dimensional
  • Traveling Waves
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Marine Propulsion Engineering and Naval Architecture