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ARTICLE
Design and experiment of membrane-type acoustic metamaterials used in EMUs to control low frequency noise
1
Locomotive & Car Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing, China
2
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, China
Submission date: 2024-08-03
Final revision date: 2024-12-11
Acceptance date: 2025-01-13
Online publication date: 2025-03-25
Corresponding author
Leiming Song
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, China
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, China
KEYWORDS
TOPICS
ABSTRACT
Acoustic metamaterials, a new type of material with great design flexibility, have been widely studied by scholars in recent decades. For high-speed electric multiple units (EMUs), a membrane-type acoustic metamaterial is used to design a lightweight sound insulation material that adapts to the space requirements within the low frequency range. A theoretical analysis on the membrane-type acoustic metamaterial was carried out. The sound insulation coefficient was calculated. Experimental comparisons were conducted on six different thicknesses of films combined with five types of additional masses. The experimental results verified the sound insulation performance. It has great potential for designing lightweight noise reduction structures.
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| eISSN: | 2543-6309 |
| ISSN: | 1429-2955 |
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