Load Analysis And Optimization Of FSAE Racing Car Frame

The FSAE vehicle frame is an important subsystem to support the load and almost all the subsystems connects with it.This paper aims to design an optimal frame subsystem to improve the full vehicle performance.The studies were mainly carried out as follows:(1)A rigid-flexible FSAE full vehicle dynamic model was built in Adams/Car environment.The frame was treated as flexible and the deformation was considered in the model.The load conditions where the frame connect with other subsystems were analyzed and extracted under some extreme driving working conditions.The transfer path from the tire force to the frame was also studied.(2)The Finite Element Model of FSAE Frame was established and the free mode analysis was conducted in HyperWorks.In addition,the analyses of the frame strength frame bending and torsional stiffness were carried out through the Optistruct solver,which is used to determine the constraint range of the design variables in the frame optimization.(3)The frame optimization model was built in Optistruct platform and both the topological optimization and size optimization were carried out.The results show that the optimal frame weight reduces by 17.1%,and the frame strength increases by 27.8%.The torsion mode frequency of the optimal frame is also improved.