考虑到冲击信号在时域内表现出的复杂特征，对其在频域内进行拟合优化，并最终得到优化的信号拟合形式。
Considering the complex characters of shock response signal in time domain, the signal is fitted and optimized in frequency domain, and the fit form after optimizing is acquired in the end.
为了便于时域卷积，对不同模量上的特征阻抗和延时函数在复频域采用矢量匹配法进行拟合。
For the convenience of time -domain convolution, the vector fitting method is adopted to approach the characteristic impedance and delay function in complex frequency-domain.
通过大量正演计算，拟合出桩周土为黏土、砂土、粉土条件下缺陷程度与时域速度响应波形中入射波与反射波波幅比之间的关系式。
Using this software, the relationship between degree of defect and ratio of amplitude was studied, in which the influence of the characteristics of the soil around piles is taken into account.
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