3D Global Weak-Form Mesh-Free Method for Acoustic Attenuation Analysis of Expansion Chambers
Joint Authors
Fang, Chun-Hui
Liu, Cheng-Yang
Fang, Zhi
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-09-09
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
In order to avoid the dependence of mesh method on grids, a 3D global weak-form mesh-free method (MFM) is applied to study the three-dimensional acoustic characteristics of silencers.
For the expansion chamber silencers, the 3D acoustic modes are extracted and the transmission loss results are computed by using the 3D global weak-form (MFM), which is based on the radial basis function point interpolation method (RPIM) for calculating the shape functions and Galerkin method for discretizing the system equation.
The first 15 order 3D acoustic modes and TL results of a special expansion chamber silencer are presented to validate the computational accuracy of the proposed technique, and the relative errors are controlled within 0.5% by comparing with the 3D finite element method (FEF) calculations.
Additionally, the effects of axial modes on the acoustic characteristics are investigated, and the pass through frequencies can be eliminated to enhance the acoustic attenuation performance by locating the side branch outlet on the nodal lines of axial modes.
American Psychological Association (APA)
Fang, Chun-Hui& Liu, Cheng-Yang& Fang, Zhi. 2020. 3D Global Weak-Form Mesh-Free Method for Acoustic Attenuation Analysis of Expansion Chambers. Shock and Vibration،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1213123
Modern Language Association (MLA)
Fang, Chun-Hui…[et al.]. 3D Global Weak-Form Mesh-Free Method for Acoustic Attenuation Analysis of Expansion Chambers. Shock and Vibration No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1213123
American Medical Association (AMA)
Fang, Chun-Hui& Liu, Cheng-Yang& Fang, Zhi. 3D Global Weak-Form Mesh-Free Method for Acoustic Attenuation Analysis of Expansion Chambers. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1213123
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1213123