Wan, L.; Li, Y.; Song, J.; Ma, X.; Dong, X.; Zhang, C.; Song, J. Vibration Response of Soil under Low-Frequency Vibration Using the Discrete Element Method. Agriculture2023, 13, 1958.
Wan, L.; Li, Y.; Song, J.; Ma, X.; Dong, X.; Zhang, C.; Song, J. Vibration Response of Soil under Low-Frequency Vibration Using the Discrete Element Method. Agriculture 2023, 13, 1958.
Wan, L.; Li, Y.; Song, J.; Ma, X.; Dong, X.; Zhang, C.; Song, J. Vibration Response of Soil under Low-Frequency Vibration Using the Discrete Element Method. Agriculture2023, 13, 1958.
Wan, L.; Li, Y.; Song, J.; Ma, X.; Dong, X.; Zhang, C.; Song, J. Vibration Response of Soil under Low-Frequency Vibration Using the Discrete Element Method. Agriculture 2023, 13, 1958.
Abstract
The vibration response of soil is a key property in the field of agricultural soil tillage. Vibration components of tillage machinery are generally used to reduce tillage resistance and improve work efficiency, the pressure variation under low-frequency vibration will affect the fragmentation and dispersion of farmland soil. However, the gradient of pressure variation, frequency domain response, and effective transmission range are unclear. A new method based on DEM (Discrete Element Method) is presented to study the vibration response and pressure transmission under low-frequency vibration. Bench test results showed that peak pressure positively correlates with the vibration frequency and attenuates rapidly at the vibration distance of 100 to 250 mm. The results data were also selected to determine the simulation model parameters. Amplitude, vibration frequency, and soil depth were used as test factors in single-factor simulation tests, and their effects on the peak pressure, frequency domain response, and effective transmission distance were analyzed. The results showed a positive relationship between the peak pressure and the test factors. The peak pressure increases with a maximum gradient of 19.02 kPa/mm at a vibration distance of 50 mm. The amplitude, vibration frequency, and soil depth positively correlate with the dominant frequency amplitude. The main frequency is independent of amplitude and soil depth. At the vibration distance of 250 mm, the dominant frequency is approximately twice the vibration frequency at 7–11 Hz and approximately equal to the vibration frequency at 13–15 Hz. Multiple exponential functions were used to fit the peak pressure attenuation function, obtaining an effective transmission distance range of 347.15 to 550.37 mm for the 5kPa cut-off pressure. For a soil depth of 300 mm, the vertical shear wave diffusion angle is greater than the horizontal shear wave diffusion angle. The study clarifies the vibration response of soil under low-frequency vibration, which helps to design vibration type soil-engaging components of tillage machinery and match vibration parameters for energy saving and resistance reduction in soil tillage.
Keywords
soil; low-frequency; discrete element method; vibration response; transmission
Subject
Environmental and Earth Sciences, Soil Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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