基于ABAQUS软件,建立聚氨酯支撑结构的免充气轮胎模型.分析发现,免充气轮胎由于胎面弧度较小,胎面较薄,导致胎面部位应力过渡不良,轮胎产生的接地压力较大,接地压力分布较窄,接地面积较小,接地性能较差;聚氨酯支撑结构产生应力集中,易产生疲劳损坏.对免充气轮胎进行优化,增大胎面弧度,即增加胎面厚度.优化后的免充气轮胎B和免充气轮胎C,其接地压力分布均匀,最大接地压力分别减小20.84%和26.85%;轮胎的接地面积分别增加18.65%和34.94%,使得接地性能明显提高;支撑结构的最大应力分别减小16.8%和13.53%,表现为应力集中现象减弱.优化后的免充气轮胎综合性能提高较大.%Based on the ABAQUS software,the non-pneumatic tire with polyurethane support structure was established. The results show that the tread curvature is smaller and tread is thinner,resulting in poor stress transfer in tread area. The grounding pres-sure of tire is bigger,the distribution of grounding pressure is narrow,the grounding area is smaller and the performance of ground-ing is worse. The stress concentration is produced in the polyurethane support structure which it is easy to produce fatigue damage. The non-pneumatic tire is optimized by increasing tread curvature and tread thickness. For the optimized non-pneumatic tires B and tires C,the ground pressure distribution is uniform,the maximum ground pressure is reduced by 20.84%and 26.85% respectively, the grounding area is increased,the ground contact area is increased by 18.65% and 34.94%,and the grounding performance is im-proved. For support structure,the stress is decreased,the maximum stress is decreased by 16.8% and 13.53% respectively and stress concentration is weakened. The comprehensive performance of the non-pneumatic tire is improved after the optimization.
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