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Structural-Acoustic Wave Transmission and Reflection in a Hose-Pipe System

[+] Author Affiliations
Y. F. Hwang

Applied Research Laboratory, State College, PA

Paper No. IMECE2002-32683, pp. 91-96; 6 pages
doi:10.1115/IMECE2002-32683
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Noise Control and Acoustics
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Noise Control and Acoustics Division
  • ISBN: 0-7918-3643-6 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

An analysis of sound and vibratory transmission and reflection losses in a fluid filled planar piping system which consists of straight pipe segments, flexible hose, elbows and/or U-joints is discussed in this paper. The transfer matrix approach is used for the analysis. The wave propagation constants for various types of waves calculated from the transfer matrix method were verified with an exact elasticity theory. Although calculation of the transmission losses for a hose-pipe system has been widely discussed in the literature, the reflection characteristics of a hose-pipe system, however, have not received proper attention. In this paper, we calculate the reflection, absorption, and transmission coefficients of a piping system simultaneously. The numerical example shows that very large pressure and bending wave transmission losses that occur in a hose-pipe system are not only caused by attenuation and dissipation but also by the reflection from the system.

Copyright © 2002 by ASME

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