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首页> 外文期刊>Geotechnical testing journal >In Situ Measurement of the Dynamic Penetration of Free-Fall Projectiles in Soft Soils Using a Low-Cost Inertial Measurement Unit
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In Situ Measurement of the Dynamic Penetration of Free-Fall Projectiles in Soft Soils Using a Low-Cost Inertial Measurement Unit

机译:使用低成本惯性测量装置原位测量软土中自由落体射弹的动态渗透

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摘要

Six degree-of-freedom motion data from projectiles free-falling through water and embedding in soft soil are measured using a low-cost inertial measurement unit, consisting of a tri-axis accelerometer and a three-component gyroscope. A comprehensive framework for interpreting the measured data is described and the merit of this framework is demonstrated by considering sample test data for free-falling projectiles that gain velocity as they fall through water and self-embed in the underlying soft clay. The paper shows the importance of considering such motion data from an appropriate reference frame by showing good agreement in embedment depth data derived from the motion data with independent direct measurements. Motion data derived from the inertial measurement unit are used to calibrate a predictive model for calculating the final embedment depth of a dynamically installed anchor.
机译:使用由三轴加速度计和三分量陀螺仪组成的低成本惯性测量单元,可以测量来自弹丸自由落入水中并嵌入软土中的六个自由度运动数据。描述了用于解释测量数据的综合框架,并通过考虑自由落体弹丸的样本测试数据证明了该框架的优点,这些自由落体弹丸在掉入水中并自埋在下面的软黏土中时会加快速度。通过在独立的直接测量中从运动数据得出的嵌入深度数据中显示出良好的一致性,本文显示了从适当的参考帧考虑此类运动数据的重要性。从惯性测量单元获得的运动数据用于校准预测模型,以计算动态安装的锚固件的最终嵌入深度。

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