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 language | English |
|---|---|
| Pages (from-to) | 1185-1192 |
| Number of pages | 8 |
| Journal | Shengxue Xuebao/Acta Acustica |
| Volume | 46 |
| Issue number | 6 |
| Publication status | Published - Nov 2021 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 Acta Acustica.
ASJC Scopus Subject Areas
- Acoustics and Ultrasonics