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Development of a simple, economical, and robust method of estimating G_(max) using Bender Elements

机译:开发使用Bender Elements估算G_(max)的简单,经济且可靠的方法

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摘要

A method for automating the measurement of shear wave velocity from triaxial tests, and hence of determining G_(max) the shear modulus at very small strains is presented. The method makes use of bender elements and cross correlation between input and output signals. Provided the correct peak in the cross correlation signal is identified and the frequency is above some critical level this method provides a robust and simple approach that is relatively independent of waveform and frequency. The approach is easy to integrate into existing test control programs, and it is shown how the technique may be implemented at relatively low cost.
机译:提出了一种自动测量三轴试验剪切波速度的方法,从而确定了在很小应变下的剪切模量G_(max)。该方法利用了弯曲元素以及输入和输出信号之间的互相关。如果识别出互相关信号中的正确峰值,并且频率高于某个临界水平,则此方法将提供一种鲁棒且简单的方法,该方法相对独立于波形和频率。该方法易于集成到现有的测试控制程序中,并显示了如何以相对较低的成本实现该技术。

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