从松散与密实的概念入手，提出用临界孔隙比等参数判断散料的振动松散与密实效应，并进行了相关的实验研究和理论分析。
Beginning with the concept of loosening and compacting, the paper determines effect of vibration on loosening and compacting of dispersed media using such parameters as critical porosity.
振动荷载及动水力对下层土体密实度影响较静力荷载明显。
Vibrating load and dynamic waterpower compacts soil obviously than static load.
从时间域和频率域两个角度对土密实度瞬态振动测试信号进行了分析，提取了信号的特征参量。
The signal of instant vibration testing for soil compactness is analyzed both in time domain and frequency domain. Some feature parameters reflecting the characteristics of the signal are extracted.
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