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http://dx.doi.org/10.7734/COSEIK.2015.28.2.139

Numerical Analysis and Verification of Sound Absorbing Properties of Perforated Plate  

Yoon, Gil-Ho (Division of Mechanical Engineering, Hanyang Univ.)
Kim, Ki-Hyun (Division of Mechanical Engineering, Hanyang Univ.)
Choi, Jung-Sik (Division of Mechanical Engineering, Hanyang Univ.)
Yun, Su-Hwan (Korea Railroad Research Institute/High-speed Railroad System Research Center)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.28, no.2, 2015 , pp. 139-144 More about this Journal
Abstract
Recently, to realize sound-absorbing structures, we have to insert sound-absorbing materials into wall. These shapes are taken limitations because sound-absorbing materials should be fixed. Therefore, the sound absorption is changed by environment that used the sound-absorbing materials. On the other hand, we will take same effect without sound-absorbing material, if we change the shape of wall to sound absorbing structure. If we use this sound absorbing structure, we can get benefits by removing limitation of materials. Therefore we suggest perforated plate for effective sound-absorbing structure. We confirmed the function of sound-absorption of this structure using equivalent property. Then, we found the similarity between perforated plate and resonator. Also, we verify these theories through computer simulation by FEM(Finite Element Method). Finally, we validated that perforated plate has function of sound absorption without sound-absorbing material. This perforated plate is used for sound-absorbing material of buildings and transportations such as vehicle, train etc. Also, these results could be further used basic tool for design of sound-absorption structure.
Keywords
sound absorption coefficient; perforated plate; equivalent frequency; helmholtz resonator; resonance frequency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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