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Analytical Modelling of Sound Transmission Through a Row of Thick-walled Channels

Authors
  • Oulmi, Mohcene
  • Roger, Michel
  • Boualem, Benali
Publication Date
Dec 07, 2020
Identifiers
DOI: 10.48465/fa.2020.0498
OAI: oai:HAL:hal-03221403v1
Source
HAL-INRIA
Keywords
Language
English
License
Unknown
External links

Abstract

The present work is dealing with the transmission ofoblique plane waves through a periodic row of thick-walledchannels of finite length. It is aimed at investigating howsound is transmitted in some parts of the ventilation ductsintegrated in electrical machines used in railways applica-tions.A two-dimensional analytical mode-matching methodwithout flow is proposed, according to which modal ex-pressions are written in sub-domains and matched accord-ing to conservation laws of fluid dynamics. The trans-mission and reflection coefficients are computed from thematching equations. Effects of channel length, frequency,wall thickness, are discussed. A particular attention is paidto the resonances in the system.

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