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INVESTIGATION OF NON-PNEUMATIC TIRES BASED ON HELICAL HEXAGONAL CELLULAR STRUCTURE

机译:基于螺旋六角形细胞结构的非气动轮胎的研究

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Non-pneumatic tires (NPTs) have drawn attention mainly due to low contact pressure and low rolling resistance due to use of hyper-elastic materials in their construction. In this paper, an attempt to innovate the conventional design of NPT with hexagonal honeycomb cellular structure is made by creating the boundary planar geometries of the tire, skew to each other at a certain angle. Adding to the functionality as a tire, this modified structure increases the performance of automobile components by rejection of heat through convection(forced) at the expense of engine power. The primary investigation includes study of the effects of variation in degree of skewness with the strength and flow of air through the tire. The flow parameters are computed for rotational case and the heat transfer is computed for flow over a brake disk. The secondary investigation consists of finding an optimum range of the degree of skewness. The validation for strength is computed through Finite Element Analysis. The fluid flow is computed through Computational Fluid Dynamics approach in ANSYS Fluent. This modified structure improves the aerodynamic condition near the brake rotor that increases the rate of heat rejection by forced convection from the brake rotor surface.
机译:非充气轮胎(NPT)引起人们的关注主要是由于在其构造中使用了超弹性材料,从而降低了接触压力并降低了滚动阻力。在本文中,尝试通过创建轮胎以一定角度彼此倾斜的边界平面几何形状来创新具有六角形蜂窝状蜂窝结构的NPT的常规设计。除了作为轮胎的功能外,这种改进的结构还通过降低对流(强制)产生的热量来提高汽车零部件的性能,但以发动机的动力为代价。初步研究包括研究偏斜度变化对强度和通过轮胎的空气流量的影响。针对旋转情况计算流量参数,并针对通过制动盘的流量计算热传递。二次调查包括找到偏斜度的最佳范围。强度验证是通过有限元分析计算的。流体流量是通过ANSYS Fluent中的计算流体动力学方法计算得出的。这种改进的结构改善了制动转子附近的空气动力学状况,从而通过从制动转子表面强制对流提高了散热率。

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