• Title/Summary/Keyword: 허니콤 복합 판재

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Sound Insulation Performance of Honeycomb Composite Panel for a Tilting Train (틸팅 열차용 허니콤 복합 적층재의 차음성능)

  • Kim, Seock-Hyun;Seo, Tae-Gun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.12
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    • pp.1931-1936
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    • 2010
  • In Korean tilting trains, honeycomb composite panels are used for high speed and light weight. The side wall of a tilting train consists of an aluminum honeycomb coated with carbon-fiber-reinforced epoxy skin and a nomex honeycomb panel as the main structure, with glass wool inserted between the panels. In this study, based on ASTM E2249-02, we measure the intensity sound transmission loss (TL) of the honeycomb composite panels. Using mass law deviation (MLD), we estimate the sound insulation performance of the honeycomb composite panels in terms of their weight and explore the feasibility of substituting a conventional corrugated steel panel. The transmission-loss data of the honeycomb composite panels obtained in the study will be used to establish noise-reduction measures for train compartments.

Investigation of Cell Size Effects of Honeycomb Sandwich Composite Square Tubes Under Compressive Loadings (허니콤 샌드위치 복합소재 정사각 튜브의 셀 크기에 따른 압축거동평가)

  • Kim, Jung-Seok;Yoon, Hyuk-Jin;Kwon, Tae-Soo
    • Journal of the Korean Society for Railway
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    • v.13 no.1
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    • pp.31-36
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    • 2010
  • The objective of this study is to evaluate effects of honeycomb cell size for compressive behaviors of square sandwich composite tubes with woven fabric carbon/epoxy skin and Al honeycomb core. In order to achieve these goals, four different kinds of tubes were fabricated and compressed to 200mm~250mm under quasi-static load of 10mm/min. The Al honeycombs with cell size of 6.35mm and 9.53mm were used. The relationship of mean compressive load and cell size was evaluated. In addition, the effect of peel strength and equivalent elastic modulus in ribbon direction for the mean compressive load was investigated.

Transmission loss of Honeycomb Composite Panel of the Tilting Train (틸팅 열차용 허니콤 복합판재의 투과손실)

  • Kim, Seock-Hyun;Lim, Bong-Gi;Kim, Jae-Chul;Jang, Yun-Tae
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.1088-1091
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    • 2009
  • In a tilting train, aluminium honeycomb composite panel is used for the high speed and light weight. Side wall of the tilting train includes the composite panel of carbon fiber, aluminium honeycomb and epoxy fiber as a main structure. In this study, we measure the transmission loss (TL) of the honeycomb composite panel and analyse the sound insulation performance by using the orthotropic plate model. We investigate experimentally how the air gap, plywood and glass wool improve the sound insulation performance of the composite panel. The purpose of the study is to provide practical information for the improvement of TL of the honeycomb composite panel used for the tilting train.

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Sound Insulation Strategy of the Side Panels in a Tilting Train (틸팅열차 측면재의 차음 전략)

  • Kim, Seockhyun;Seo, Taegun
    • Journal of Industrial Technology
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    • v.31 no.A
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    • pp.33-38
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    • 2011
  • In an express tilting train, side wall insulating the noise from the exterior sound source consists of two parts. One is the layered composite panel including aluminum honeycomb, glass wool and nomex honeycomb. The other is the double glazed window. In this study, sound insulation performance of the two parts is investigated by mass law and experiment. Based on ASTM E2249-02, the intensity sound transmission loss (TL) is measured on the specimens of the two parts. Mass law deviation (MLD) is considered in order to compare the sound insulation performance in respect of weight. Contribution of each part to the sound insulation is analyzed and the sound insulation strategy for the interior noise reduction is investigated.

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