OptiStruct software is used to carry out topology optimization on the bearing structure of the front end of the car body.With the volume fraction as the constraint and the minimum strain energy as the optimiza-tion objective,the car body front end skeleton structure is rearranged through the optimization results.The op-timized car body is loaded at three different positions:coupler mounting base,front end energy absorption structure and anticreeper to complete the simulation of the impact process of the rigid wall on the car body.The impact force time curve and stress distribution at different times during the impact process of the car body are analyzed,and the weak stiffness area of the car body is obtained.The load-bearing limit of the car body is determined through the critical point of stress change.The energy time curves of different components in the weak stiffness area are verified with the above bearing limit results.The results show that the stiffness of the front end of the car body is greatly improved after the optimization.In the car body bearing limit,different loading positions have little influence on the car body bearing limit.Through the energy time curve of different components in the weak stiffness area,the time when the vehicle body bearing limit reaches the critical point can be accurately found,which provides more accurate data analysis for the vehicle body dynamic bearing limit.
front end bearing structure of vehicle bodytopology optimizationdynamic bearing limitweak stiffness area
维普
万方数据
