方程式赛车传动系大链轮的设计与优化

Design and Optimization of Large Sprocket of Transmission System for Racing Car

以小型方程式赛车主减速的大链轮为研究对象,在保证赛车动力性和安全稳定性的前提下,对大链轮进行轻量化设计与优化。首先根据理论计算,确定传动系主减速器传动比为2.92,并进行了动力性验证。确定了链轮各主要参数,建立了有限元模型,应用ANSYS对大小链轮进行了75m直线加速工况下应力和变形量的分析,结合初始结构的仿真结果,优化了链轮支撑肋个数和减重孔尺寸,结果显示:对比原始方案,优化后的链轮总质量减少了17.14%,最大应力减少了21%,最大变形量减小了42.4%。实现了在确保强度的前提下,减轻主减速器质量的目的,为赛车大链轮设计与优化提供一定的指导意义。

the main sprocket wheel in the FSAE racing car is taken as the research object.On the premise of guaranteeing the power and stability of the car,the lightweight design and optimization of the large sprocket are carried out.First,according to the theoretical calculation,the transmission ratio of the main reducer is determined to be 2.92,and the dynamic performance is verified.The main parameters of the sprocket are determined,the finite element model is established,and the stress and deformation of the sprocket are analyzed by ANSYS under 75m linear acceleration.Combined with the simulation results of the initial structure,the number and weight reduction holes of the sprocket ribs are optimized.The results show that:compared with the original structure,the total mass of the optimized sprocket is reduced by 17.14%,the maximum stress is reduced by 21%,and the maximum deformation is reduced by 42.4%.The purpose of lightening the main reducer is achieved under the premise of ensuring the strength,it will provide some guidance for the design and optimization of large sprockets.