闭孔泡沫铝中低频振动的阻尼性能测试

The damping performance measurement of cellular aluminium foam on low frequencyvibration

为研究泡沫铝材料的动态减振性能,利用自行设计的实验装置,通过电磁振动实验台配合多通道动态信号采集分析系统,对泡沫铝材料在不同激振条件下的减振效果进行了系统研究。结果表明,泡沫铝材料在中高频下具有优异的减振效果且具有很大的频率依赖性,试样几何参数对其减振范围具有重要影响,相同条件下孔径越小减振效果越优异。

Using electromagnetic vibration test platform with multi-channel dynamic signal acquisition and analysis system,low frequency vibration dynamic damping property of cellular aluminium foam was investigated systematically.The results show that cellular aluminium foam displays excellent vibration damping effect and its performance is closely depended on the frequency under the medium and high frequency loads.Moreover,the geometrical parameters of the samples have important influence on the vibration reduction range,and the smaller the pore-size is,the better the damping effect is under the same conditions.The results of the research can provide the experimental basis for the engineering application of cellular aluminium foam.