Optimizing Design And Simulation Of FSAE Race Car Suspension

With the development of the automotive industry, peple no longer be satisfied with the ordinry car funtion, but with all kinds of race car appearing, it contents people to'high speed'requirements. In 2010, our country held the first formula SAE of China, it also brings FSAE race car into campus. In the automobile design, the performance and structural form of suspension affect directly riding comfort and operating stability. Having a good suspension system can have a good vehicle system. Suspension is one of the most important assemblies of vehicle. FSAE race car suspension research is still a very important research direction.Firstly according to the layout of vehicle, this thesis selects suspension structure form of the race car and finally front and rear suspension of the car uses double wishbone suspension with different length of push rod. The next step is to design preliminarily the main parameters and oriented structure of front and rear suspension, use Adams/car module to build respectively simulation models of front and rear suspension, experiment double wheels parallel beating simulation on front and rear suspension and get located parameters of wheels and changing curve of main parameters of suspension. Finally this thesis uses Adams/Insight to optimize located parameters of front and rear suspension. Optimized process not only needs to consider the variation of performance index, but also consider the impact of operating stability. The result of optimization shows that front and rear suspension of the racing car satisfies design requirements and the suspension performance achieves ideal range. In order to analyze comprehensively, this thesis also researches statics and analyzes the main components of suspension using finite element method. Analytic result shows that the suspension satisfies structure requirements from deformation and stress. Based on modal analysis, the design of low arm is also satisfies requirements. Modal analysis of low arm also provides reference for finite element analysis of double wishbone suspension.