Prediction of Coincidence Frequencies for a Thin-Walled, Fluid-Filled Pipe

Abstract

This technical note outlines the role of piping-based noise generation and transmission in naval applications. It describes the nature of turbulence and how it generates acoustic energy. Coincidence between higher order acoustic modes and resonant structural modes is defined and its role in determining the efficiency of generating pipe wall vibrations by internal pressure fluctuations is discussed. The inertia effect of contained liquids is discussed. Coincidence data are presented for a 100 mm NB schedule 40 steel pipe, and the implications for naval applications discussed.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1992
Accession Number
ADA253457

Entities

People

  • C. L. Sasadeusz
  • R. G. O'donnell

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Bessel Functions
  • Crystal Lattice Vibrations
  • Doppler Effect
  • Equations
  • Fluid Flow
  • Fluids
  • Frequency
  • Frequency Shift
  • Internal Pressure
  • Noise
  • Resonant Frequency
  • Salt Water
  • Vibration
  • Water
  • Waves

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Plasma Physics / Magnetohydrodynamics
  • Structural Dynamics.