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Numerical Analysis of Frictional Heat Generation in Bicycle Disc Brake

机译:自行车盘式制动器中摩擦发热的数值分析

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Precise braking operations are pivotal to ensure safety in modern day vehicle designs. Brakes are mechanical devices for increasing the frictional resistance that obstructs the turning motion of vehicle wheels by absorbing either kinetic, potential energy or both while in action. This absorbed energy appears in the form of heat. Stress, distribution of friction on surface, frictional heat generation, material and geometry are the major controlling factors for efficiency of braking operations. Frictional heat generation and its effective dissipation is one of the most predominant of these factors and hence it is the focus of this study. The purpose of this study is to analyze the thermal behavior of a full bicycle disc brake using finite element method. Sequential thermal structured method based on Ansys 14.5 is used to carry out the numerical simulation for evaluating the variation of total heat flux and temperature profiles with respect to time. The analysis model was studied experimentally and results obtained by numerical analysis were within 3% of the experimental result for maximum temperature. The model is thus adequately validated to be followed for a similar analysis on bicycle brakes.
机译:精确的制动操作是关键的,以确保现代车辆设计中的安全性。制动器是用于提高摩擦阻力的机械装置,其通过吸收动力学,潜在的能量或在行动中的两者之间阻碍车轮的转动运动。这种吸收的能量以热量的形式出现。压力,表面上的摩擦分布,摩擦发热,材料和几何形状是制动操作效率的主要控制因素。摩擦发热及其有效耗散是这些因素最大的偏重之一,因此这是本研究的重点。本研究的目的是使用有限元方法分析全自行车盘式制动器的热行为。基于ANSYS 14.5的顺序热结构方法用于执行用于评估总热通量和温度剖面的变化相对于时间的数值模拟。通过实验研究了分析模型,并通过数值分析获得的结果在实验结果的3%以内以获得最高温度。因此,该模型被充分验证,以便在自行车制动器上进行类似的分析。

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