采用动力接触有限元法分析强夯中夯锤对地基土的冲击碰撞过程，建立动接触力与速度之间的接触关系式。
Uses dynamic contact FEM to analyze impact and collision of hammer to foundation soil in the dynamic compaction, establishes the contact relation between dynamic contact force and speed.
当头盘系统发生碰撞时，冲击激励峰值加速度与作用时间的倒数之间具有近似线性关系。
When the head disk collision occurs, the peak acceleration of the shock pulse approximately follows a linear relationship with the inverse of the excitation duration.
又通过发动机机体表面振动加速度，确定活塞敲击噪声产生的根源在于活塞与缸套的碰撞冲击。
It has also been clear that the source of piston knock noise is the impact between piston and cylinder sleeve by the vibration acceleration of the engine's body surface.
物料经转子加速后以一定的绝对速度大小和方向冲击在打击板上，物料与打击板处于正碰撞状态，使物料得以有效破碎。
The materials are accelerated by the rotor into a certain absolute speed and direction, and impact on the striking board in a positive bumpiness status with the materials crushed effectively.
物料经转子加速后以一定的绝对速度大小和方向冲击在打击板上，物料与打击板处于正碰撞状态，使物料得以有效破碎。
The materials are accelerated by the rotor into a certain absolute speed and direction, and impact on the striking board in a positive bumpiness status with the materials crushed effectively.
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