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.
本文采用动力接触有限元法分析了强夯对地基土的冲击碰撞过程。夯击过程中，夯点周边地基土存在局部大变形现象。
This paper uses dynamic contact FEM to analyze impact and collision course of dynamic compaction to foundation soil.
对激光涂层进行了多次冲击碰撞试验，并通过SEM等手段分析研究了激光涂层在多冲碰撞载荷下的裂纹形成与扩展机理。
The flaws' forming and expanding mechanism had been analyzed and studied, that was happened on the laser coating under repeated impact load by SEM or some other methods.
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