胎圈结构参数对机械弹性车轮接地压力分布的影响  

Influences of bead structure parameters on contact pressure distribution of mechanical elastic wheel

作　　者：付宏勋[1] 赵又群[1] 林棻[1] 杜现斌[1] 王强[1] 朱明敏[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《农业工程学报》2015年第17期57-64,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：总装探索研究项目(NHA13002);江苏省普通高校研究生科研创新计划资助项目;江苏省研究生培养创新工程(KYLX15_0254)

摘　　要：为了进一步掌握机械弹性车轮的接地特性,该文着重研究了胎圈结构参数对车轮接地压力分布的影响。建立了车轮胎圈曲梁模型,通过对车轮承载变形的理论分析,确定影响车轮接地特性的结构参数为胎圈断面高宽比、弹性环断面高宽比和弹性环分布位置。针对不同的胎圈结构参数,建立对应的车轮有限元模型并验证了模型有效性。利用有限元分析软件ABAQUS对其作静态接地特性仿真试验,结果表明减小胎圈断面高宽比、弹性环断面高宽比或弹性环分布系数,可不同程度地增大车轮接地长度和接地面积,并使车轮平均接地压力和接地压力偏度值减小。对比不同胎圈结构参数的车轮,其接地长度最大增加7.2%,接地面积最大增加21.6%。该文为优化机械弹性车轮的接地特性提供了参考。Non-pneumatic safety tires have been introduced with a new type of elastomer, which functions as the air of the pneumatic tire. It appears to have advantages over the pneumatic tire in terms of flat proof and maintenance free. As the pursuing of consumer on car safety, handling stability and comfort continue to enhance, the study of the non-pneumatic tire is also growing. The mechanical elastic wheel is a kind of non-pneumatic tire. A mechanical elastic wheel with a non-pneumatic elastic outer ring which functions as the air of the pneumatic tire was presented to reduce the risk of puncturing, and its loading mode and contact behaviors were different from the pneumatic tire. In this paper, the influences of bead structure parameters on contact pressure distribution of mechanical elastic wheel were investigated to provide certain guidance for optimizing the mechanical contact characteristics of the mechanical elastic wheel. First of all, the Timoshenko circle curved beam model of the bead was established to describe the deformation characteristics of wheel bearing. Through the theoretical analysis of wheel bearing deformation, the main structural parameters affecting the mechanical elastic wheel contact behaviors were found, which contained bead section ratio, elastic ring section ratio and elastic ring distribution coefficient. Secondly, different bead structure parameters were put forward, and the three-dimensional finite element（FE） models of the corresponding mechanical elastic wheel were developed. The model of mechanical elastic wheel consisted of a thin flexible annular outer ring and hinge units that connected the outer ring with a rigid hub. To establish the FE model, various nonlinear factors, such as the geometrical nonlinearity, the material nonlinearity and the contact nonlinearity, were considered comprehensively. In order to prove the validity of the FE model, the load characteristic test of the mechanical elastic was conducted by tire test-bed. Finally, the commercial FE software ABAQUS was use

关 键 词：轮胎 模型 有限元法 非充气轮胎 机械弹性车轮 曲梁模型 结构参数 接地特性 

分 类 号：U463.34[机械工程—车辆工程]