Phromjan Juthanee, Suvanjumrat Chakrit
Department of Mechanical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand.
Laboratory of Computer Mechanic for Design (LCMD), Department of Mechanical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand.
Heliyon. 2023 Aug 7;9(8):e18984. doi: 10.1016/j.heliyon.2023.e18984. eCollection 2023 Aug.
Soil compaction by tires of agricultural machinery severely affects field crop growth. In this study, nonpneumatic tires (NPT) were used in agricultural machinery. Experimental, empirical, and numerical approaches have been used to study the effects of NPTs on soil compaction. Random pneumatic tires and original- and reduced-spoke NPTs were experimentally examined. The results indicate that the pneumatic tire and original TWEEL increased the soil sinkage and bulk density, respectively, as compared to the reduced spoke TWEEL. This confirms that NPT have the potential to be developed for agricultural applications. Relative equations for the contact pressure and soil sinkage were derived from the experimental results. The combination of the empirical model and FEM was validated and found to be in good agreement with the experimental results of the NPT-soil compression test. The numbers and thicknesses of the NPT spoke were then varied to investigate the NPT-soil compression effects. Eventually, the soil sinkage equation was developed as a function of spoke number and thickness. Moreover, it was used to predict soil bulk density. The effects of NPT on soil compaction can be evaluated using the proposed mathematical models.
农业机械轮胎造成的土壤压实严重影响田间作物生长。在本研究中，农业机械采用了非充气轮胎（NPT）。采用实验、经验和数值方法研究了非充气轮胎对土壤压实的影响。对随机充气轮胎以及原型辐条和减辐条非充气轮胎进行了实验研究。结果表明，与减辐条TWEEL相比，充气轮胎和原型TWEEL分别增加了土壤沉陷量和容重。这证实了非充气轮胎具有开发用于农业应用的潜力。根据实验结果推导了接触压力和土壤沉陷的相关方程。经验模型和有限元法的组合得到了验证，结果表明其与非充气轮胎-土壤压缩试验的实验结果吻合良好。随后改变非充气轮胎辐条的数量和厚度，以研究非充气轮胎-土壤压缩效应。最终，建立了土壤沉陷方程，该方程是辐条数和厚度的函数。此外，该方程还用于预测土壤容重。利用所提出的数学模型可以评估非充气轮胎对土壤压实的影响。
