Numerical modeling techniques for noise emission of free railway wheels  

作　　者：Linus Taenzer Urs Pachale Bart Van Damme Andrea Bergamini Domenico Tallarico 

机构地区：[1]Laboratory of Acoustics/Noise Control,Empa,Überlandstrasse 129,Dübendorf,Switzerland

出　　处：《Railway Engineering Science》2024年第2期144-161,共18页铁道工程科学（英文版）

基　　金：The project was commissioned and supported by the funding of the Federal Office of Environment(No.1337000438).

摘　　要：In this article,we consider the numerical prediction of the noise emission from a wheelset in laboratory conditions.We focus on the fluid-structure interaction leading to sound emission in the fluid domain by analyzing three different methods to account for acoustic sources.These are a discretized baffled piston using the discrete calculation method(DCM),a closed cylindrical volume using the boundary element method(BEM)and radiating elastic disks in a cubic enclosure solved with the finite element method(FEM).We provide the validation of the baffled piston and the BEM using measurements of the noise emission of a railway wheel by considering ground reflections in the numerical models.Selected space-resolved waveforms are compared with experimental results as well as with a fluid-structure interaction finite element model.The computational advantage of a discretized disk mounted on a baffle and BEM compared to FEM is highlighted,and the baffled pistons limitations caused by a lack of edge radiation effects are investigated.

关 键 词：Discretized baffled piston Finite element Boundary element Railway noise Acoustic emission Vibrations 

分 类 号：U270.16[机械工程—车辆工程]