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中文摘要：
为了探讨复合结构与隔声性能之间的关系,探索降低低频噪声的新途径,设计并制备了增强材料纵向排列和横向排列的玻璃纤维织物/聚氯乙烯复合材料,采用混响室-静音箱法对其隔声性能进行了测试分析。研究表明：增强材料的排列形式对复合材料的隔声性能有明显的影响,复合材料的厚度超过5 mm后,在相同厚度和面密度的条件下,纵向排列的玻璃纤维织物增强复合材料比横向排列的玻璃纤维织物增强复合材料对低频和低-中频的隔声性能好;且随着复合材料厚度的增加其差异增大。因此,可以通过改变增强材料的排列形式来改善复合材料对低频和低-中频噪声的隔声性能。
英文摘要：
In order to discuss the relationship between the composite structure and acoustic insulation property, and explore a new approach to reduce the low-middle frequency noise, the composites with two different arrangements of glass fabric, vertical structure and laminated structure, in polyvinyl chloride resin were fabricated. The experiments for acoustic insulation property were carried out in a reverberation-anechoic chambers measuring system. As a result, the arrangement of glass fabric has an obvious influence on the acoustic insulation property in the developed composites. When the thickness of the composites exceeds 5 mm under the same thickness and surface density, the composites with vertical fabric structure show the better acoustic insulation property in low frequencies and low-middle frequencies than that with laminated fabric structure. The difference due to the vertical and laminated structures will become larger with the increase of sample thickness. Therefore, it is shown that changing the arrangement of the reinforcements can improve the acoustic＂ insulation property of low frequencies and low- middle frequencies.
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