Experimental and Numerical Observations of the Frequency-Domain Method in Bender-Element Testing
Experimental and Numerical Observations of the Frequency-Domain Method in Bender-Element Testing
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Bender 元件测试中频域方法的实验和数值观察
DOI：
10.1061/(asce)gt.1943-5606.0001603
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发表时间：
2017
影响因子：
3.9
通讯作者：
A. Fonseca
中科院分区：
文献类型：
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作者：
J. Camacho;H. Ali;G. Cascante;A. Fonseca
在弯曲元件（BE）测试中，剪切波速度的测量主要采用两种方法：脉冲激励振动数据的时域分析和正弦扫描激励振动的频域分析。频域分析可以自动进行。然而，其结果显示出高的可变性，因为它们受到不同变量的影响，如激励的频率内容，BE系统的谐振频率，以及频域分析的分辨率。本文利用简化的数学模型和边界元、微型加速度计和共振柱（RC）试验的结果，研究了频域法的可靠性。数学模型用于了解频域方法中不同变量的影响。实验和数值结果表明，放大峰的传递函数的BE系统可以显着影响的估计剪切波速度。
AbstractIn bender-element (BE) testing, shear-wave velocities are measured using two main methods: time-domain analysis of vibration data from pulse excitation and frequency-domain analysis of vibration from sine-sweep excitation. The frequency-domain analysis can be performed automatically. However, its results show high variability because they are affected by different variables such as the frequency content of the excitation, the resonant frequency of the BE system, and the resolution of the frequency-domain analysis. The reliability of the frequency-domain method is studied in this paper using simplified mathematical models and experimental results from BEs, miniature accelerometers, and resonant-column (RC) tests. The mathematical models are used to understand the effects of different variables in the frequency-domain method. Both laboratory and numerical results show that amplification peaks in the transfer function of the BE system can significantly affect the estimation of the shear-wave velocity...
通过弯曲单元测试贝加尔湖粘土的动态剪切模量
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Hachikubo;A.;木田 真人;Alexey Krylov;八久保 晶弘;Shino Miyakita
通讯作者：
Shino Miyakita