用动态接触长度估算土-轮胎界面应力的解析模型

IF 2.4 3区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL Journal of Terramechanics Pub Date : 2023-09-09 DOI:10.1016/j.jterra.2023.08.006
Behzad Golanbari, Aref Mardani
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引用次数: 0

摘要

土与轮胎的相互作用是一种复杂的现象,受土壤性质、车轮上的垂直载荷和轮胎特性等多种因素的影响。然而,由于土壤的不可预测性,估计轮胎-土壤界面的应力是一项具有挑战性的任务。现有的轮-土相互作用模型是基于土壤力学参数的,这些参数变化很大,需要大量的时间和资源来精确测量。相比之下,车轮沉降到土壤中的量可以实时测量,并从土壤的力学特性中得出。因此,有必要建立应力与车轮特性之间的关系,如动态接触长度和轮胎在土壤中的下沉。为了解决这一问题,本研究引入了一种估算轮胎与土壤动态接触面的分析方法。然后提出了一个数学模型来估计应力,假设土和轮胎之间的接触面和变压力。通过在土仓内进行三种不同竖向荷载水平和四种不同车轮通行水平的试验,重复三次,对应力模型进行验证。
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An analytical model for stress estimation at the soil-tire interface using the dynamic contact length

The interaction between soil and tire is a complex phenomenon influenced by various factors, such as soil properties, vertical load on the wheel, and tire characteristics. However, estimating stress at the tire-soil interface is a challenging task due to the unpredictable nature of soil. Existing models for investigating the wheel-soil interaction are based on soil mechanical parameters, which are highly variable and require significant time and resources to measure accurately. In contrast, the amount of wheel sinkage into the soil can be measured in real-time and is derived from the mechanical properties of the soil. Therefore, there is a need to establish a relationship between stress and wheel characteristics such as dynamic contact length and tire sinkage in soil. To address this issue, this study introduces an analytical method to estimate the dynamic contact surface between the tire and soil. A mathematical model is then proposed to estimate stress, assuming the contact surface and variable pressure at the interface between the soil and tire. The stress model is validated through experimental tests conducted at three different vertical load levels and four different wheel traffic levels in the soil bin, repeated three times.

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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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