Abstract

This study aims to investigate the relationship between the static characteristics of non-pneumatic tires (NPTs) and spoke design parameters using the finite element (FE) method. A three-dimensional FE model of the NPT was established. The influence of different ranges of stress and strain on the calculation accuracy of the Neo-Hookean and Yeoh constitutive models was analyzed. Subsequently, the main design parameters—spoke thickness, spoke number, and arc curvature—were selected according to the geometric characteristics of the spokes. The effects of these three parameters on the vertical stiffness, maximum spoke stress, overall maximum stress, and maximum and average contact pressures were examined using univariate and multivariate analysis methods. The range and variance analysis results indicated that the spoke thickness, spoke number, and arc curvature had a significant effect on the vertical stiffness. Finally, the relationship between the vertical stiffness and product of the spoke thickness and number was obtained using a nonlinear fitting method. When the arc curvature of the spoke was less than 5 m⁻¹, the errors between the calculated and simulated vertical stiffness did not exceed 5%. This observation can be used to facilitate the rapid design of spoke parameters under different load capacity requirements.

中文翻译：

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正交研究与方差分析辐条参数对非充气轮胎承载能力的影响

摘要

本研究旨在利用有限元（FE）方法研究非充气轮胎（NPT）的静态特性与辐条设计参数之间的关系。建立了NPT的三维有限元模型。分析了不同应力应变范围对Neo-Hookean和Yeoh本构模型计算精度的影响。随后，根据辐条的几何特性，选择了主要设计参数——辐条厚度、辐条数量和圆弧曲率。使用单变量和多变量分析方法检查了这三个参数对垂直刚度、最大辐条应力、总体最大应力以及最大和平均接触压力的影响。极差和方差分析结果表明，辐条厚度、辐条数量和圆弧曲率对垂直刚度有显着影响。最后，利用非线性拟合方法得到了垂直刚度与辐条厚度和数量的乘积之间的关系。当辐条圆弧曲率小于5 m ^-1时，垂直刚度计算值与模拟值误差不超过5%。该观察可用于方便快速设计不同负载能力要求下的辐条参数。