THE RESPONSE OF SIMPLE PANELS TO TURBULENT BOUNDARY LAYER EXCITATION

Abstract

The response of a series of panels to turbulent boundary layer excitation was measured for flow velocities of 329 ft./sec. and 540 ft./sec., and boundary layer thicknesses in the range 0.4 inch to 1.4 inches. The effects of boundary layer thickness, pressure field convection direction, panel aspect ratio and static pressure differential are well predicted. The effect of flow velocity is not predicted accurately, the theory over-estimating the effect near coincidence and under-estimating the effect elsewhere. The boundary layer thickness affects the panel vibration mainly through the pressure spectrum. Static pressure affects the vibration mainly through the change in stiffness. Random techniques are used to measure panel damping in the presence of an airflow and the results show an increase in damping due to the flow. The increase is small in general.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1967
Accession Number
AD0824482

Entities

People

  • John F. Wilby

Organizations

  • University of Southampton

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Air Force
  • Boundary Layer
  • Convection
  • Frequency Bands
  • Magnetic Fields
  • Measurement
  • Modulus Of Elasticity
  • Plastic Explosives
  • Pressure Distribution
  • Pressure Gradients
  • Recording Systems
  • Resonant Frequency
  • Standing Waves
  • Test And Evaluation
  • Three Dimensional
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Fluid Mechanics and Fluid Dynamics.
  • Human-Computer Interaction (HCI).