【摘要】 泡沫铝材料在交通运输、航天和建筑隔声等方面具有广阔的应用前景，然而单层泡沫铝其内部孔径和孔隙率不同严重影响了材料的隔声效果。构造两种复合结构，分别采用COMSOL软件仿真和实验室阻抗管测试两种手段对隔声性能进行了研究，结果表明：泡沫铝-玻璃纤维吸音棉复合结构在低频和中高频的隔声性能有一定的改进，而对于泡沫铝-三聚氰胺海绵复合结构，其隔声性能在各个频段均得到了极大提升，平均隔声量提升了将近6.8dB。更多还原

【Abstract】 Aluminum foam has broad applications in transportation, aerospace and building sound insulation. However, the internal pore size and porosity of single-layer aluminum foam seriously affect the sound insulation effect. In this paper, the sound insulation performance of the two constructed composite structures was studied by COMSOL software simulation and impedance tube experimental test, respectively. The results showed that the sound insulation performance of aluminum foam with glass fiber sound-absorbing cotton composite structure has been improved in low frequency and medium high frequency. While in the case of aluminum foam with melamine sponge composite structure, its sound insulation performance has been greatly improved in whole frequency bands, and the average sound insulation has increased by nearly 6.8dB.更多还原