TY - JOUR
T1 - Face-based smoothed finite element method for simulating the sound field of a high-speed train
AU - Huang, Songhua
AU - Xu, Yugong
AU - Liu, Zhaoxin
AU - Dou, Weiyuan
AU - Zhang, Lele
N1 - Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors would like to gratefully acknowledge the financial support provided by National Natural Science Foundation of China (grant no. 51475036).
Publisher Copyright:
© The Author(s) 2023.
PY - 2023
Y1 - 2023
N2 - Simulating three-dimensional acoustic problems with traditional finite element models (FEMs) may result in a large dispersion error that is difficult to manage. To control dispersion error caused by “overly stiff” features of FEM, a face-based smoothed FEM (FS-FEM) model was used to analyze the sound field of a high-speed train. Based on the acoustic Galerkin method’s weak form, smooth regions were reconstructed within the original finite element area, and numerical simulations were performed in MATLAB. Modal analysis of a test example revealed that results obtained using FS-FEM are more accurate than those obtained using the traditional FEM. Finally, it was used to calculate the sound field of China Railway High-speed 380B (CRH380B) high-speed trains in time and frequency domains, achieving higher accuracy than the traditional approach. Results were more akin to the realistic solution, which demonstrated the performance of the FS-FEM.
AB - Simulating three-dimensional acoustic problems with traditional finite element models (FEMs) may result in a large dispersion error that is difficult to manage. To control dispersion error caused by “overly stiff” features of FEM, a face-based smoothed FEM (FS-FEM) model was used to analyze the sound field of a high-speed train. Based on the acoustic Galerkin method’s weak form, smooth regions were reconstructed within the original finite element area, and numerical simulations were performed in MATLAB. Modal analysis of a test example revealed that results obtained using FS-FEM are more accurate than those obtained using the traditional FEM. Finally, it was used to calculate the sound field of China Railway High-speed 380B (CRH380B) high-speed trains in time and frequency domains, achieving higher accuracy than the traditional approach. Results were more akin to the realistic solution, which demonstrated the performance of the FS-FEM.
KW - acoustics
KW - FS-FEM
KW - high-speed train
KW - Smoothed finite element method
UR - http://www.scopus.com/inward/record.url?scp=85152363980&partnerID=8YFLogxK
U2 - 10.1177/00375497231163642
DO - 10.1177/00375497231163642
M3 - Article
AN - SCOPUS:85152363980
SN - 0037-5497
VL - 99
SP - 1057
EP - 1067
JO - SIMULATION
JF - SIMULATION
IS - 10
ER -