Acoustical Radiation from Periodically Stiffened Membrane Excited by Turbulent Boundary Layer.

Abstract

Characteristics of periodically stiffened membrane are studied by using a string model loaded with equally-spaced mass and rotary inertia. The acoustical radiation by periodically stiffened membrane excited by a turbulent boundary layer is estimated using a modal analysis on an individual bay of membrane between stiffeners. Two theoretical predictions of radiated sound power are made using statistical energy methods. One is based upon measured wall pressure data, the other upon measured vibratory response of the membrane. Both agree well with direct measurements of radiated sound power.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1975
Accession Number
ADA018425

Entities

People

  • Yi M. Chang

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Classification
  • Coefficients
  • Convection
  • Displacement
  • Frequency
  • Frequency Bands
  • Layers
  • Modal Analysis
  • Power Levels
  • Resonant Frequency
  • Sound Pressure
  • Turbulent Boundary Layer
  • Vibration
  • Waves
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Structural Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster