求翻译：从上面的位移、速度时程曲线中可以看出，在振动荷载作用下填料颗粒单元的运动也表现出波动特性；振动压实结束后，颗粒单元体速度渐渐减小，但仍然在运动，这主要是由于单元体之间的位置经过振动后已发生了相互错动，正在重新排列。振动压实中三个典型单元体的运动机制有所差异：顶部单元是在压实荷载后，速度回弹趋向零（建议从弹性和塑性变是什么意思？

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From the above the displacement, velocity curve is in the vibration can be seen, the load cell filler particles have also demonstrated the movement; vibration pressure fluctuations features real-time, and particles after the end speed gradually decrease cell body, but still in motion, this is mainly

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From the displacement, speed, duration curves can be seen, under vibration loading filler particles exhibit wave characteristics of motion; after the end of the vibrating compaction, speed of granule cells gradually decrease, but still in motion, this is mainly due to the position between the unit a

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