中文摘要：

基于室内隔声测试标准,通过试验方法,研究了多种高速列车复合板材的隔声性能。研究的板材包括：两块铝板板间夹不同厚度空气的复合板;板间夹不同密度的泡沫铝吸声材料的复合板;板间夹不同厚度的隔声垫的复合板。对以上复合板的综合研究明确了铝板夹层填充材料和厚度对隔声效果的作用。结果表明：含空气层复合铝板存在明显吻合谷,但其高频隔声性能好;泡沫铝吸声材料可有效抑制吻合谷,小的孔隙率（即增加密度）有利于提高隔声性能;隔音垫有助于提高复合板的隔声量,但是其厚度的选择要与关注的频率区段相匹配。研究结果系统地反映了复合板的影响因素,可为我国高速列车复合板隔声性能的优化提供参考依据。

英文摘要：

The sound insulation performances of various composite plates for high-speed trains were studied experimentally according to the indoor sound insulation test standard. The types of the composite plates include： different thickness of air-core between two aluminum panels, different density of porous material core （foamed aluminum） between two aluminum panels; different thickness of sound insulation pad between two aluminum panels. Through the comprehensive investigation of the above composite plates, the influence of the core thickness and the filler material on the sound insulation effect of the composite plates was determined. The results show that there is an obvious anastomosis valley for the aluminum plate with an air-core, however, its sound insulation effect is good in high frequency range. Foamed aluminum can effectively inhibit anastomosis valley, and small porosity is helpful to improve sound insulation effect. The sound insulation pad can improve the sound insulation performance of the composite plate. It is worth noting that the thickness selection of sound insulation pad depends on the concerned frequencies. In this work, systematical investigation of the influencing factors on the sound insulation performance of the composite plates for high- speed trains were conducted, which may provide a reference for the optimization of sound insulation performance of composite plates in high-speed trains.