林用小型轮式移动平台轮胎尺寸参数对其行驶性能的影响

doi:10.11707/j.1001-7488.LYKX20240155

Abstract

Abstract:

Objective: A numerical model of tire-soil interaction for the typical unsaturated red soil environment of southern forests in China is proposed. Based on the model, the impact of tire size parameters on the driving performance of small wheeled mobile platforms in forest is analyzed. This research provides a theoretical basis for optimizing tire size parameters for small wheeled mobile platforms to enhance the maneuverability. Method: The commonly used rubber tires of small wheeled mobile platform are investigated in this paper. Physical parameters of the rubber tires are determined through uniaxial tensile test. An accurate tire model is constructed using the finite element software Abaqus. In addition, unsaturated red soil samples from southern forests are collected. Physical and mechanical properties are identified through measurements and triaxial compression tests. A precise model of the unsaturated red soil is established using the discrete element software PFC3D. As a result, a novel numerical model of tire-soil interaction for the typical unsaturated red soil environment of southern forests in China is established by integrating the finite element method and the discrete element method. The approach overcomes the limitations of using either the finite element method or the discrete element method individually. Significantly, the numerical model is used to simulate the impact of tire diameter (D = 65, 75, 85 mm), width (W = 20, 25, 34 mm), and diameter-to-width ratio (D/W = 2.2, 2.6, 3.0, 3.4, 3.8) on the drawbar pull and tire sinkage. Furthermore, soil-bin tests, consistent with the simulation analysis, are established to validate the effectiveness of the numerical model and the accuracy of the analysis regarding the impact of tire size parameters on the driving performance of small wheeled mobile platforms. Result: 1） The drawbar pull shows an increasing trend with the increase in tire diameter and width. 2） The tire sinkage shows a decreasing trend with the increase in tire diameter and width, but beyond a certain range, the influence of tire diameter and width on sinkage diminishes. 3） The comprehensive indicator of tire diameter and width, the diameter-to-width ratio (D/W), has a significant impact on the drawbar pull and sinkage. Among the simulation and experimental data, a D/W ratio of 2.2 provides the maximum drawbar pull and the minimum sinkage, demonstrating the optimal driving performance. Conclusion: The research accurately establishes a numerical model of tire-soil interaction for the typical unsaturated red soil environment southern forests in China. The model can be used to analyze the impact of tire size parameters on the driving performance of small wheeled mobile platforms. Additionally, the research provides a scientific basis for the design, optimization, and mobility studies of small wheeled mobile platforms in forest.

Key words: small wheeled mobile platforms in forest, tire, finite-discrete element method, tire-soil interaction, numerical simulation, soil-bin test, driving performance

CLC Number:

Liyang Yao,Yue Zhu,Yaning Wang,Shuai Pang. Impact of Tire Size on the Driving Performance of Small Wheeled Mobile Platforms in Forest[J]. Scientia Silvae Sinicae, 2025, 61(2): 180-189.

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密度Density (ρ)/ (kg·m^?3)	Yeoh模型材料剪切特性常数 Shear property constant of material
密度Density (ρ)/ (kg·m^?3)	C₁₀	C₂₀	C₃₀	D_i (i = 1,2,3)
1.1e+03	1.2e-01	?1.7e-03	1.1e-02	0

密度 Density(ρ)/ (kg·m^?3)	含水率 Moisture content(ω) (%)	孔隙度 Porosity(Φ) (%)	黏聚力 Cohesion(τ)/ kPa	内摩擦角 Internal friction(φ)/ (°)	杨氏模量 Young’s modulus(E)/ MPa	泊松比 Poisson’s ratio(ν)
1 537	0.28	0.50	39.5	12.38	8.51	0.4

滑动摩擦系数 Coeffient of sliding friction(μ)	剪切模量 Shear modulus(G)/ Pa	表面粘附能 Surface adhesion energy(γ)/J	滚动摩擦系数 Coefficient of rolling friction(μ_r)	法向临界阻尼比 Normal critical damping ratio(ζ_n)	切向临界阻尼比 Tangential critical damping ratio(ζ_t)
0.3	1.0e7	0.35	0.25	0.2	0.2

尺寸 Dimension	重量 Weight/N	载荷容量 Load capacity/N	速度范围 Velocity range/ (m·s^?1)	扭矩 Torque/ (N·cm)	额定功率 Rated power/W
266 mm×246 mm× 192 mm	30	60	0.18-1.2	9.8	4

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Impact of Tire Size on the Driving Performance of Small Wheeled Mobile Platforms in Forest

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仿真分析方案组别 Group of simulation analysis	轮胎直径 Tire diameter(D)/ mm	轮胎宽度 Tire width(W)/mm	轮胎载荷 Tire load(F)/N	轮胎速度 Tire velocity(V)/ (m·s^?1)
Ⅰ	65	25	10	0.18
Ⅱ	75	25	10	0.18
Ⅲ	85	25	10	0.18
Ⅳ	75	20	10	0.18
Ⅴ	75	34	10	0.18