方程式汽车车架性能分析与评价

Analysis and Evaluation of Frame Performance for Formula Automobile

以中国大学生方程式汽车大赛(FSC)规则为基础,建立车架3D模型.利用力平衡公式计算赛车不同工况下悬架各个硬点集中载荷,对制动、加速和转弯工况下悬架各硬点集中载荷仿真分析,得出赛车运动时车架最大挠度为6.4542 mm,最大应力为480.66 MPa.仿真结果显示该车架满足设计要求,车架自由振动分析结果表明车架不会和CBR600发动机发生共振.该结果为赛车行驶安全性提供理论依据,也为车架设计提供一种分析思路.

Based on the rules of formula student China,a 3D model of frame was established.The force balance formula was used to calculate the concentrated load of each suspension hard point in different working conditions for racing cars,and the simulation analysis of the concentrated load of suspension hard point under braking,acceleration and turning conditions were conducted to obtain the maximum deflection of the frame was 6.4542 mm and the maximum stress was 480.66 MPa.The simulation results show that the frame can meet the design requirements,and the free vibration analysis results show that the frame will not resonate with the CBR600 engine.The results provide a theoretical basis for driving safty of racing car,and an analysis idea for the design of vehicle frames.