简述了低应变动测桩的频率理论，推导出了频率公式，得出了激励材质与频率、所测桩长之间的关系。
The frequency theory of law strain dynamic pipe measurement is sketched. The frequency formula is deduced out. The relationship between exciting material, frequency and length of piles is reached.
得出以下结论：材质、孔径大小、试样尺寸对泡沫铝的压缩性能有一定的影响。
The results are showed as follows: materials, pore size, the sample size on the compressive properties of aluminum foam have some effect.
得出以下结论：材质、孔径大小、试样尺寸对泡沫铝的压缩性能有一定的影响。
The results are showed as follows: materials, pore size, the sample size on the compressive properties of aluminum foam have some effect.
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