（通訊員 鄭侃）近日，我校yl7703永利夏俊芳教授團隊研究成果以“Effects of vibration parameters on the interfacial adhesion system between soil and metal surface”為題在Soil & tillage research發表。研究揭示了簡諧激勵下土壤-機具界面粘附系統的振動脫附機理，為長江中下遊農業區耕整機械減粘脫附、減阻降耗研究提供了新思路。

長江中下遊農業區土壤黏重闆結，耕整機械作業時觸土部件易粘附土壤，導緻作業質量降低、阻耗增加。因此，如何解決土壤粘附問題成為耕整機械研究的重點。研究表明，機械振動可有效減少土壤粘附。

土壤振動脫附物理模型

該研究為探究振幅、振動頻率和振動時間等振動特性參數對切向、法向界面粘附系統振動脫附效果的影響，搭建一套振動脫附試驗裝置，并構建土壤-機具界面粘附系統振動脫附動力學模型。

界面不同時刻振動脫附狀态

通過單因素與正交試驗，得到振動脫附率與振動特性參數間的數學模型；依據極值理論對模型尋優與驗證，得出切向振動最優參數組合為振幅7.99g，振動頻率42.87Hz，振動時間26.03s；法向振動脫附率最優參數組合為振幅9.00g，振動頻率59.76Hz，振動時間88.20s。研究結果可為長江中下遊農業區振動耕整機械研發與性能提升提供數據支撐。

yl7703永利博士研究生劉國陽為論文第一作者，鄭侃老師為通訊作者。該研究得到國家自然科學基金、公益性行業（農業）科研專項和國家重點研發計劃子課題等項目資助。

審核人：明庭慶

【英文摘要】

In actual preparation of arable lands, the soil easily adheres to soil-engaging components of tillage machinery and affects the plowing efficiency and quality, thus leading to low traction efficiency and high power consumption. It has been proposed that vibration can effectively reduce the adhesion of soils to the soil-engaging components in field operation. Here, in order to explore the vibration response characteristics of soils and the mechanism for soil detachment under sine wave vibration, a vibration detachment measurement system of soils was assembled with an acceleration sensor, an electric vibration generator, a power amplifier and a data acquisition system. The measurement system was then used to study the effects of three vibration characteristic parameters (amplitude, frequency and time) on the interfacial adhesion system between soil and metal surface (ASSM) in both tangential and normal directions. Taking the soil detachment rate as a representative characteristic of ASSM, the effect of each factor was analyzed through single-factor experiments. The optimal interval of each vibration parameter was determined based on the experiment results. According to the orthogonal experimental design and analysis, we established a mathematical model for the relationship between the vibration soil detachment rate and the vibration parameters, as well as identified their primary and secondary order and interaction effect on the soil detachment rate. As determined by response surface analysis, the optimal combination of parameters for soil detachment rate in the tangential direction is vibration amplitude of 7.99 g, vibration frequency of 42.87 Hz and vibration time of 26.03 s, and that in the normal direction is vibration amplitude of 9.00 g, vibration frequency of 59.76 Hz and vibration time of 88.20 s. The relative errors of the optimization results are 1.05% and 2.65%, respectively, which are generally consistent with the prediction results of regression equation. These results indicate that the mathematical model can be used to predict and evaluate soil adhesion under vibration. Therefore, the soil detachment performance of ASSM can be enhanced by a reasonable setting of vibration parameters, which may be of great significance for improving the working quality and efficiency of tillage machinery.

論文鍊接：https://doi.org/10.1016/j.still.2021.105294