| 基于AR谱估计的软土密实度瞬态锤击测试信号分析 |
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| 引用本文： | 靳建明,王奎华,卜发东,谢康和,张培学.基于AR谱估计的软土密实度瞬态锤击测试信号分析[J].科技通报,2004,20(4):330-333,338. |
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| 作者姓名： | 靳建明 王奎华 卜发东 谢康和 张培学 |
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| 作者单位： | 1. 浙江大学岩土工程研究所,杭州,310027
2. 山东省建筑科学研究院,济南,250031 |
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| 摘 要： | 在室内试验的基础上，提出了基于AR谱估计的土密实度瞬态锤击测试信号的分析方法，以及根据模型的阶数同信号的主峰频率之间的关系来确定模型阶次的方法．对土密实度瞬态锤击测试信号的AR谱分析结果表明，在含水量基本一致的情况下，随着试样的干密度的增大，信号的主峰频率呈增大的趋势；在干密度基本一致的情况下，随着试样含水量的增大，信号的主峰频率呈减小的趋势，证明了利用瞬态锤击测试法对软土密实度进行测试的思路是可行的．
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| 关 键 词： | 软土 密实度 瞬态锤击 AR谱估计 信号分析 |
| 文章编号： | 1001-7119(2004)04-0330-04 |
AR Spectral Estimation-based Signal Analysis on Measuring of Soft Soil Compactness by Instant Hammering Method |
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| JIN Jian-ming,WANG Kui-hua,BU Fa-dong,XIE Kang-he,ZHANG Pei-xue.AR Spectral Estimation-based Signal Analysis on Measuring of Soft Soil Compactness by Instant Hammering Method[J].Bulletin of Science and Technology,2004,20(4):330-333,338. |
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| Authors: | JIN Jian-ming WANG Kui-hua BU Fa-dong XIE Kang-he ZHANG Pei-xue |
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| Institution: | JIN Jian-ming~1,WANG Kui-hua~1,BU Fa-dong~2,XIE Kang-he~1,ZHANG Pei-xue~2 |
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| Abstract: | On the basis of instant hammering tests in lab, an auto-regressive (AR) modeling based spectral estimation procedures is presented to overcome it. The method using the relation between the model order and the main peak frequency to determine the model order is put forward. It is shown that with the same water content, the greater the dry density of soil is, the higher the main peak frequency by the AR spectral analysis of measuring signal of soft soil compactness. on the other hand, with the same dry density, the greater the water content of soil is, the smaller the main peak frequency. This result proofed the idea using vibration method to test the soft soil compactness is feasible. |
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| Keywords: | soft soil compactness instant hammering AR Spectral estimation signal analysis |
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