Abstract
This study proposed a design method for forced-vibration subsoiling to reduce resistance and consumption. The vibration digging parameters of the Antlion larvae were obtained by high-speed camera, and a forced-vibration subsoiling shovel handle and six different shovel tips were designed by the non-smooth resistance-reducing surface design method. The resistance-reducing and consumption-reducing effects were verified in the field subsoiling experiment. The results showed that the resistance of subsoiling gradually decreased with the vibration frequency increasing. This vibration subsoiling method could not only reduce resistance but also reduce the total energy consumption, the resistance reduction rate reached 14.2–21.2%, and the total energy consumption was reduced by 11.2–16.5%. It could achieve the comprehensive subsoiling effect and create the soil conditions with the combination of loose and firmness. The non-smooth surface contributed to the reduction in resistance, and the forward speed had a more negligible effect on the resistance of subsoiling. The results had demonstrated that the combination of high-frequency vibration and non-smooth surfaces helped to reduce the cohesion of the soil, reduce the angle of internal friction in the soil, destroy the water film layer on the contact surface between the soil-touching components and the soil, change the soil flow state, and reduce the adhesion of the interface layer. The design method in this study could not only be applied to the design of vibration resistance reduction in the subsoiler but also had significance for the design of the other soil-contacting components.
Highlights
Soil compaction is one of the most severe forms of soil degradation caused by traditional tillage practices, and it refers to the decrease in porosity between soil aggregates [1,2,3]
Numerous studies have shown that the vibration resistance reduction effect of the soil-touching component was highly adaptable in different soil environments [21,22,23]
The results showed that this high-frequency controlled vibration subsoiling could reduce both the resistance and the total energy consumption of subsoiling operations
Summary
The damage of soil compaction on cultivated land, in the form of stunted crop root growth, affects crop growth [4]; the supply chain of water and nutrients in the soil will be broken [5], with the microbial colony imbalance; the number of host organisms, such as earthworms, will decrease [6] These damages affect crop production and cause severe economic losses to the world [7]. This leads to increased subsoiling resistance, increased energy consumption, and poor subsoiling operation quality and is easy to cause damage to machines and tools in severe conditions [15] This problem can be solved by bionics, electroosmosis, and vibration methods [16,17,18]. Numerous studies have shown that the vibration resistance reduction effect of the soil-touching component was highly adaptable in different soil environments [21,22,23]
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