摘要
本文从集中参数模型入手，讨论了单自由度和多自由度振动系统的导纳谱形式与特征，给出了完整桩与各种缺损桩的导纳振幅谱判断依据及计算处理方法，为导纳谱法在实际中的更好应用提供了理论说明。
from mass-damp-spring model,the forms and charactedstics of admittance about one to three free dimension system were discussed in the paper. The admittances of various pile foundations were calculated. The spectra characteristics of typical flaws were shown. The quantitative evaluations of defects in the pile were proposed.
关键词
桩基
动态检测
集中参数
导纳振幅谱
锤击
dymamic testing of pile foundation
concentration parameter
admittance spectrum
dynamic rigidity
