在仅考虑纵波传播的情况下，寻出了撞击力-压入位移关系。
The relationships between dynamic contact force and indentation are derived in the case of longitudinal wave propagation.
采用不同桩侧土抗力与桩身位移关系的模式，以有限单元法进行分析；
In the analysis, the finite element method and other simplified methods are compared using different models of lateral soil stiffness.
基于动力学方程、本构关系和应变-位移关系建立了小变形粘弹性梁的振动方程。
Based on the dynamical equation, the constitutive relation and the strain-displacement relation, the vibration equation of small deflection beams was derived.
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