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.
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。
The difference, relation and applied conditions of some kinds of typical analytical models of sliding bearing nonlinear dynamic oil-film force were analyzed, a new analytical model was put forward.
分析了几种典型径向滑动轴承非线性动态油膜力解析模型之间的区别、联系及其相应的适用条件，提出了一种新的径向滑动轴承非线性动态油膜力解析模型。
The paper trys to analyse stability of column by the method of dynamic analysis, deduces the formula of relation between axial compressive force and frequency of transverse vibration.
尝试用动力分析的方法对压杆稳定问题进行理论分析与实验研究。
The paper trys to analyse stability of column by the method of dynamic analysis, deduces the formula of relation between axial compressive force and frequency of transverse vibration.
尝试用动力分析的方法对压杆稳定问题进行理论分析与实验研究。
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