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| | The recent research progress of polyurethane acoustic material and its sound absorbing products was reviewed in this articles. The applications of the polyurethane acoustic material in submatrine, architecture and noise control were introduced. | | 简要概述了聚氨酯声学材料及其吸声制品的国内外发展状况,介绍了它在舰船、建筑及其他噪音控制等方面的应用研究进展。 | | 文摘来源 | | Decorating glassfiber board is a new type of sound absorbing product. This paper introduces the development of glassfiber sound absorbing product, the properties of construction and materials of decorating sound absorbing board. According to the experimental data, this paper analyses the effects of board thickness, decorating surface and air space depth and application. | | 玻纤装饰板是玻璃纤维材料的一种新型吸声制品。介绍了玻纤吸声产品的进展、装饰吸声板的构造以及 材料的特点,根据实验数据分析了板厚、饰面和空腔深度对吸声的影响及其应用。 | | 文摘来源 | | Based on the spectrum characteristics of railway noise,cementitious materials with high performance of absorbing noise have been researched which including craft of manufacture,performance of absorbing noise and mechanical performances.Cementitious materials with high performance of absorbing noise manufactured with two-dimension stress,take cement as the main connection materials and swell pearl sand as skeleton.The basic proportion is coagulant∶aperture admixture∶skeleton∶water=(5∶1∶45∶2.5)(volume rate).T... | | 根据铁路噪声的频谱特性,针对高性能水泥基吸声材料的制成工艺、吸声性能以及力学性能进行研究。高性能水泥基吸声材料以水泥作为主要胶结材料,以膨胀珍珠岩为骨料,采用二维压力挤压成型。其基本配合比采用胶结剂∶孔结剂∶骨料∶水=5∶1∶45∶2.5(体积比)。利用水泥水化初期的可塑特性,通过孔结剂调整水泥基胶结体的孔隙特性,使高性能水泥基吸声材料形成多孔且在一定集域中连通的类絮状结构,从而使其具有良好的吸声性能。检测结果表明,该吸声材料的吸声系数大于0.8,达到了一等吸声制品的要求,同时其力学、耐候和耐久性能良好。 | | 文摘来源 | |   | | << 更多相关文摘 |
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