Acoustic attenuation performance prediction of silencing ducts by 2D isogeometric finite element method and its application

Liang Yang, Hongling Sun, Jun Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The two dimensional (2D) IsoGeometric Finite Element Method (IG-FEM) is applied to predict the acoustic attenuation performance of silencing ducts. Acoustic eigenvalues of duct cross-section are obtained by 2D IG-FEM and then the Transmission Loss (TL) is calculated. Perforated boundary and sound-absorbing material boundary are also considered. TL results of a rectangular silencing duct agree well with those obtained from the FEM and the accuracy of the IG-FEM is verified. Test case of a round cross section demonstrates that IG-FEM obtains more accurate results than the FEM does at almost the same computation cost. Under several different structure parameter conditions, TL of test examples by the IG-FEM are well compared with 3D numerical method. The IG-FEM can accurately predict the TL over a wide frequency range.

Original languageEnglish
Pages (from-to)1185-1192
Number of pages8
JournalShengxue Xuebao/Acta Acustica
Volume46
Issue number6
Publication statusPublished - Nov 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 Acta Acustica.

ASJC Scopus Subject Areas

  • Acoustics and Ultrasonics

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