消声管道声学性能计算的二维等几何有限元方法及应用

杨亮; 孙红灵; 杨军

doi:10.15949/j.cnki.0371-0025.2021.06.038

消声管道声学性能计算的二维等几何有限元方法及应用

杨亮¹,
孙红灵^1,2,
杨军^1,2, ,

1. 中国科学院噪声与振动重点实验室(声学研究所) 北京 100190;
2. 中国科学院大学北京 100049

基金项目:

国家自然科学基金项目(11474306,11472289)

中国科学院青年创新促进会项目资助

详细信息

通讯作者:
杨军,E-mail:jyang@mail.ioa.ac.cn

PACS:
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出版历程
- 收稿日期: 2019-10-20
- 修回日期: 2020-11-14
- 网络出版日期: 2022-06-24
- 刊出日期: 2022-06-24

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

1. Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190;
2. University of Chinese Academy of Sciences, Beijing 100049

摘要

摘要: 将等几何有限元方法应用于消声管道的声学性能计算,使用二维等几何有限元方法求解管道截面的声学特征值,考虑了存在穿孔边界和吸声材料边界的情况,进而使用特征值计算消声管道的传递损失。对包覆式消声管道进行传递损失的计算,结果与二维有限元方法吻合较好.对圆形截面的特征值计算结果表明,在计算量相同的情况下,等几何有限元方法取得了比传统有限元方法更好的计算精度.在不同结构参数条件下对消声管道的声学性能进行计算,结果与三维数值方法吻合良好。方法能够在宽频范围内较好地预测消声管道的传递损失。
- 消声管道 /
- 传递损失 /
- 等几何有限元方法 /
- 声学特征值分析
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.
- Silencing duct /
- Transmission loss /
- Isogeometric FEM /
- Acoustic eigenvalue analysis