Crown Design of Radial Tire Bio-inspired by Cat Paw Pads
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摘要: 为缓解轮胎抓地与磨损性能间的固有矛盾,以某205/55R16乘用车子午线轮胎为研究对象,对轮胎胎冠进行仿生设计。采用WALKWAY压力测试系统获取猫前爪动态接地特性,并配合3D激光扫描仪进行逆向拓扑。对猫爪掌垫横截面点云进行多项式拟合并采用相似原理对胎冠进行仿生设计。利用ABAQUS建立模型,对比仿生胎与样胎静载、制动、侧偏工况下接地面积与压力分布。结果表明:仿生轮胎设计可有效增大接地面积,降低峰值接地压力,改善轮胎偏磨损现象,实现轮胎抓地与磨损性能协同提升。Abstract: In order to alleviate the inherent contradiction between tire grip and wear performance, a radial tire of a certain type of 205/55R16 passenger car was taken as the research object, and the tire crown was bionic designed in this paper. The dynamic grounding characteristics of cat′s paw were obtained by WALKWAY pressure test system, and the reverse topology was carried out with 3D laser scanner. Polynomial fitting is carried out on the cross-sectional point cloud of cat paw pad, and bionic design of tire crown is carried out with similarity principle. The finite element models of bionic tire and sample tire were built in ABAQUS and used to compare the ground contact area and pressure distribution between bionic tire and sample tire under static load, braking and cornering conditions. The results show that the bionic tire design can effectively increase the ground contact area, reduce the peak ground contact pressure, improve the tire eccentric wear phenomenon, and thus realize the synergistic improvement of tire grip and wear performance.
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Key words:
- tire crown /
- bionic design /
- grounding performance /
- finite element analysis
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表 1 加强筋材料属性
Rebar材料 杨氏模量/GPa 泊松比 密度/(kg·m-3) 角度/(°) 1#带束层钢丝 105.9 0.29 7 800 66 2#带束层钢丝 105.9 0.29 7 800 114 胎体帘线层 5.25 0.30 1 350 0 表 2 接地印迹试验与仿真数值
接地参数 试验值 仿真值 相对误差/% 长轴长度/mm 151.70 148.67 2.0 短轴长度/mm 117.04 114.19 2.4 印迹面积/cm2 156.73 150.96 3.7 表 3 轮胎制动接地参数
方案 抓地力/N 接地压力/MPa 接地压力标准差/MPa 接地面积/cm2 样胎 3 511 0.682 70 0.139 72 151.93 仿生轮胎 3 537 0.609 40 0.129 03 155.32 差值/% 0.7 -10.8 -7.7 2.2 表 4 轮胎稳态侧偏接地数据
侧偏角度 侧偏力/N 峰值接地压力/MPa 接地压力标准差/MPa 接地面积/cm2 样胎 仿生轮胎 差值 样胎 仿生轮胎 差值 样胎 仿生轮胎 差值 样胎 仿生轮胎 差值 2° 626 631 0.8% 5.903 5 5.285 2 -10.5% 0.1272 0.118 6 -6.8% 148.87 152.60 2.5% 4° 1 190 1 207 1.4% 6.357 4 5.716 9 -10.1% 0.133 2 0.128 4 -3.6% 139.20 143.34 3.0% 6° 1 760 1 791 1.8% 6.793 9 6.031 1 -11.2% 0.160 4 0.154 1 -3.9% 144.19 149.34 3.6% 8° 2 086 2 134 2.3% 7.222 2 6.716 2 -7.0% 0.171 1 0.166 6 -2.6% 141.27 149.58 5.9% -
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