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《机械工程前沿(英文)》 >> 2013年 第8卷 第4期 doi: 10.1007/s11465-013-0281-7

Experimental and computational validation of a scaled train tunnel model using modal analysis

School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia

发布日期: 2013-12-05

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摘要

Acoustic engineers are faced with the challenge of minimising reverberation time in their designs so as to contribute to the health and well-being of those traveling by train and those on the platforms. Although the problem is easy to identify, it is not as simple to solve. The acoustical environment of a train tunnel is complex, with a variety of noise contributing factors such as train announcements, speech of commuters, ventilation systems, electrical equipment and wheel and rail noise. As a result, there is some difficulty in modeling the complete acoustic environment with computational or acoustic first principles. In this study, an experimental rig was constructed to model the acoustic behavior within a tunnel. The modal properties for the 300 Hz to 1500 Hz range, including resonances and mode shapes were identified and were shown to successfully correspond to theoretical results and a computational model created in COMSOL using Finite Element Analysis.

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