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THE DYNAMIC PROPERTIES OF A NON-PNEUMATIC TIRE WITH FLEXIBLE AUXETIC HONEYCOMB SPOKES

机译:具有柔性自粘性蜂巢状点的非气动轮胎的动力特性

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Motivated by our previous study on the flexibility and low local stress of auxetic hexagonal honeycombs in uni-axial loading, we explore the dynamic characteristics of a flexible auxetic hexagonal lattice structure when it is used as the flexible spokes of a non-pneumatic tire. In this study, a modal analysis and the steady state vibration characteristics of NPTs with cellular spokes are investigated with a series of vertical loads and rolling speeds using a commercial finite element code, ABAQUS/Explicit. The angular velocity and the displacement at the hub center and the reaction force on the ground were investigated in the time and frequency domains for the steady state rolling condition for vehicle speeds of 60km/h and 80km/h. The orthotropic properties of the honeycomb spokes create different modal behaviors compared with those of pneumatic tires; e.g., the in-plane shear at the initial mode. The discrete spoke geometry induces a non-homogeneous mass (non-uniformity) distribution, which also causes local vibration effects.
机译:基于我们先前在单轴载荷下对六边形六角形蜂窝的柔韧性和低局部应力的研究,我们探索了当用作非充气轮胎的柔性辐条时,六边形六角形格子结构的动力学特性。在这项研究中,使用商业有限元代码ABAQUS / Explicit,以一系列垂直载荷和轧制速度研究了带有蜂窝状辐条的NPT的模态分析和稳态振动特性。在60 km / h和80 km / h的车速稳态滚动条件下,在时域和频域中研究了轮毂中心的角速度和位移以及对地面的反作用力。与充气轮胎相比,蜂窝状轮辐的正交异性特性会产生不同的模态行为。例如,初始模式下的面内剪切。离散的辐条几何形状会引起不均匀的质量(非均匀性)分布,这也会引起局部振动效应。

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