【摘要】 介绍固有频率和振型的理论推导方法——矩阵迭代法。运用有限元分析软件ABAQUS建立桩-土试验模型,进行频率分析,提取桩-土模型的前30阶固有频率和振型。对桩-土模型进行显式动态分析,总结在动荷载作用下桩体应力的分布情况以及外层弱化土域的位移变动趋势。更多还原

【Abstract】 The article introduces the theoretical derivation method of natural frequency and vibration mode- matrix iteration method. A pile – soil test model is set up by the finite element analysis software ABAQUS to carry out the frequency analysis and to extract the first 30-order natural frequency and vibration mode of the pile–soil model. The article introduces the explicit dynamic analysis of the pile- soil model, and summarizes the stress distribution of pile under the dynamic load and the displacement change trend of the outer earth weakening domains.更多还原