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Manufacturing and modelling of sintered micro-porous absorption material for low frequency applications

机译：低频应用的烧结微孔吸收材料的制造和建模

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摘要

A novel sintering based method to produce thin ultrahigh molecular weight polyethylene, UHMWPE, absorption material layer to increase absorption at low frequencies is introduced. The experimental impedance tube measurement results show that a 4 mm thick sintered sample layer increases absorption at a low frequency range below 1000 Hz compared with commercial melamine and polyester absorption foam samples. To cover a wider frequency range, multilayer structures composed of a sintered micro-porous material layer and commercial melamine and polyester foam layers are created and examined. The sintered sample layer also increases absorption in multilayer structures at low frequencies. Absorption coefficient values above 0.5 are reached starting from 200 Hz with multilayer structures. Software exploiting Biot's theory of porous materials has been adopted to fit the experimental absorption data for sintered samples, commercial foams and multilayers. Software based on Biot's theory was found to deliver quite good correlation with measured absorption coefficient values, with disagreements below 10% between the measured and estimated values.
机译：介绍了一种基于烧结的新颖方法，该方法可生产超高分子量的超薄聚乙烯（UHMWPE）吸收材料层，以增加低频吸收。实验阻抗管测量结果表明，与商用三聚氰胺和聚酯吸收泡沫样品相比，厚度为4 mm的烧结样品层在1000 Hz以下的低频范围内增加了吸收。为了覆盖更宽的频率范围，创建并检查了由烧结微孔材料层以及商用三聚氰胺和聚酯泡沫层组成的多层结构。烧结的样品层还增加了低频下多层结构的吸收。多层结构从200 Hz开始达到0.5以上的吸收系数值。已采用利用Biot多孔材料理论的软件来拟合烧结样品，商业泡沫和多层材料的实验吸收数据。发现基于Biot理论的软件与测量的吸收系数值具有很好的相关性，测量值与估计值之间的差异低于10％。

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  • 来源
    《Applied Acoustics》 |2014年第11期|150-160|共11页
  • 作者

    Marjaana Karhu; Tomi Lindroos; Seppo Uosukainen;

  • 作者单位

    VTT Technical Research Centre of Finland, Sinitaival 6, P.O. Box 1300, FI-33101 Tampere, Finland;

    VTT Technical Research Centre of Finland, Sinitaival 6, P.O. Box 1300, FI-33101 Tampere, Finland;

    VTT Technical Research Centre of Finland, Tekniikantie 44, P.O. Box 1000, FI-02044 VTT, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Micro-porous; Sound absorption;

    机译：微孔;吸音;

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