Optimal Design And Reliability Analysis Of Braking System For FSAE Racing Car

The race car is a vehicle with highly demanding maneuverability.The braking system of the car directly affects the safety of the driver and the final result of the race.Therefore,it is of great significance to improve the braking performance and improve the reliability of the braking system.This paper first introduces the braking system,the braking system structure,functional classification and working principle.Different kinds of the brake system are compared and the suitable braking system form is selected for the use of the car.According to the requirements of the national regulation and competition rules,the vehicle force model is established by using the theory of automobile to determine the main parameters of the braking system.The optimal braking system design parameters with good braking performance and high braking efficiency are obtained by mathematical modeling and optimization of braking force distribution ratio of front and rear brakes.Secondly,through the understanding of heat transfer and friction heat theory,the temperature distribution of disc brake is studied.On the premise of ensuring the accuracy of the analysis,the structure of disc brake is simplified,and the finite element analysis model is established.Based on the analysis of the temperature field of the brake,the differential equation of the three-dimensional transient heat conduction is established and the thermal parameters required are determined according to the relevant formula.Using ABAQUS software to analyze the thermal structure coupling of disc brakes,it is found that the temperature of the brake is related to the size of the brake.The multi-objective genetic optimization algorithm based on MATLAB is used to optimize the performance of the brake.Finally,in order to improve the reliability of the braking system,reduce the manufacturing and maintenance costs,the theory and method of reliability analysis are used to analyze common failure modes and the causes of the braking system.The fault tree of malfunction faults of the braking system is established and analyzed qualitatively and quantitatively.