한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2012년도 춘계학술대회 논문집
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- Pages.582-585
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- 2012
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- 1598-2548(pISSN)
고속철도차량용 알루미늄 압출재의 차음성능에 대한 폼 충전효과
Sound-Insulation Performance of Aluminum Extruded Panel by Charging Foam in a High-speed Train
- 발행 : 2012.04.26
초록
The aluminum extruded panel used for a high speed train shows the largest contribution to sound insulation performance of the train body. However, comparing with the flat panel having the same weight, the transmission loss falls sharply in the local resonance frequency band. Such fall of transmission loss can be improved by increasing the damping of local resonance. This study examines the charging effect of an urethane foam on the aluminum extruded panel of a high speed train. We charged the urethane foam with different mass density and in different way in the core part of the extruded panel. We measure the transmission loss and compare the sound insulation performance according to the density and charging method. Finally, Improvement effect of the transmission loss is compared and analysed in aspect of weight increment.
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