泡沫铝室温声频内耗特征

Characteristic of Internal Friction of Foamed Aluminium at Ambient Temperature

采用声频内耗仪测定了泡沫铝在室温下不同振幅、频率的内耗，研究了泡沫铝的室温声频内耗特征，并讨论了泡沫铝内耗产生的机理。

The characteristic of internal friction of foamed aluminium at ambient temperature and acoustic frequency is investigated through measuring the internal friction of foamed aluminium at different strain amplitudes and different frequencies with audio frequency internal friction analyzer. The mechanism of internal friction of foamed aluminium is also involved. 