Effect of contact length of bias ply tractor tire on its tractive performance

IF 2.4 3区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL Journal of Terramechanics Pub Date : 2024-03-14 DOI:10.1016/j.jterra.2024.100969
Harsha Chandrakar, Hifjur Raheman
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Abstract

In order to study the effect of contact length of tire on tractive performance of tractor, experiments were conducted using a single wheel tester fitted with 13.6–28 bias ply tire in a soil bin in soft soil condition. Contact length and contact width were measured at different normal loads (9.8 kN and 13.72 kN) and inflation pressures (83, 103, 124 and 138 kPa). Results showed that the contact length had higher influence on tire pulling ability and tractive efficiency as compared to contact width of the tire. An equation for predicting contact length was developed using XLSTAT software, with normal load and inflation pressure as an independent variables and contact length as a dependent variable. The model demonstrated high efficiency with a coefficient of determination (R2) 0.96, a percentage of variation 0.76 %, a root mean square error 10.841, and an adjusted R2 0.95. Additionally, a second-order polynomial equation was developed using curve fitter app to estimate drawbar pull of a tractor by keeping wheel slip and contact length as independent parameters. Validation with another set of data obtained for 14.6–28 tire yielded R2 0.93 and less than 4 % variation, thus indicated the model’s accuracy in predicting drawbar pull.

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斜交帘布拖拉机轮胎的接触长度对其牵引性能的影响
为了研究轮胎接触长度对拖拉机牵引性能的影响,在软土条件下,使用装有 13.6-28 斜交轮胎的单轮测试仪在土仓中进行了实验。在不同的正常载荷(9.8 千牛和 13.72 千牛)和充气压力(83、103、124 和 138 千帕)下测量了接触长度和接触宽度。结果表明,与轮胎接触宽度相比,接触长度对轮胎牵引能力和牵引效率的影响更大。使用 XLSTAT 软件,以正常载荷和充气压力为自变量,接触长度为因变量,建立了一个预测接触长度的方程。该模型的确定系数 (R2) 为 0.96,变异百分比为 0.76%,均方根误差为 10.841,调整后的 R2 为 0.95,显示出较高的效率。此外,还使用曲线拟合器应用程序开发了一个二阶多项式方程,通过保留车轮滑移和接触长度作为独立参数来估算拖拉机的牵引杆拉力。用 14.6-28 轮胎的另一组数据进行验证,结果 R2 为 0.93,变化率小于 4%,从而表明该模型在预测牵引力方面的准确性。
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来源期刊
Journal of Terramechanics
Journal of Terramechanics 工程技术-工程:环境
CiteScore
5.90
自引率
8.30%
发文量
33
审稿时长
15.3 weeks
期刊介绍: The Journal of Terramechanics is primarily devoted to scientific articles concerned with research, design, and equipment utilization in the field of terramechanics. The Journal of Terramechanics is the leading international journal serving the multidisciplinary global off-road vehicle and soil working machinery industries, and related user community, governmental agencies and universities. The Journal of Terramechanics provides a forum for those involved in research, development, design, innovation, testing, application and utilization of off-road vehicles and soil working machinery, and their sub-systems and components. The Journal presents a cross-section of technical papers, reviews, comments and discussions, and serves as a medium for recording recent progress in the field.
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