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국부 공진을 고려한 주름강판의 차음 설계Sound Insulation Design of the Corrugated Steel Panel Considering Local Resonance
- Other Titles
- Sound Insulation Design of the Corrugated Steel Panel Considering Local Resonance
- Issue Date
- 2010
- Publisher
- 한국소음진동공학회
- Keywords
- Corrugated Panel; Sound Transmission Loss; Local Resonance; 주름판재; 음투과손실; 국부공진
- Citation
- 한국소음진동공학회논문집, v.20, no.7, pp.672 - 676
- Journal Title
- 한국소음진동공학회논문집
- Volume
- 20
- Number
- 7
- Start Page
- 672
- End Page
- 676
- ISSN
- 1598-2785
- Abstract
- In a railway vehicle, corrugated steel panel is widely used for the floor structure because of its high bending stiffness and light weight. However, this panel shows lower sound insulation performance than that of the flat plate with the same weight. Especially, in a particular frequency region, transmission loss(TL) rapidly decreases and it results in the deterioration of sound insulation performance of the overall floor structure. This study identifies that the severe decrease in TL is caused from the local resonance of the periodic corrugated structure. TL decrease by local resonance is investigated by experiment and finite element analysis. Finally, design modification of the corrugation is proposed to improve TL and the effect is verified by experiment.
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