| With the depletion of oil resources and the increase in the degree of pollution of automobile emissions,contemporary cars are moving in the direction of safety,energy saving and environmental protection.Electric bus in the environmental protection,energy conservation role Needless to say,its lightweight development has also been more and more people’s attention.Body skeleton is the main bearing structure of electric buses,the use of steel and aluminum hybrid body frame,which can effectively reduce the weight of the skeleton,to improve vehicle performance,increase the driving range is of great significance.According to the characteristics of the study of bus operation are: 1)load range of change,the peak traffic per square meter standing up to several people,and usually in a semi-loaded state;2)changes in operating conditions,start,,Slow down,brake and other changes frequently,changing the situation on the body strength,stiffness is a huge test.So how to coordinate the body structure,quality,strength,stiffness is the enterprise producers and designers must solve the problem.Based on the actual development of the model,this paper analyzes the rigidity and strength of the skeleton of the steel and aluminum hybrid electric vehicle,and puts forward the optimization scheme of the skeleton of the steel and aluminum hybrid structure.The main contents of this paper are as follows:(1)Through the analysis of the status quo of domestic and foreign scholars of steel and aluminum hybrid electric bus structure,there is no uniform standard in the connection between the skeleton structure and the connection between steel and aluminum,and there is room for improvement;(2)Based on the research contents of this paper,the finite element model of body skeleton and the method of stiffness and strength analysis of finite element model are discussed;Standard test materials for steel-aluminum mixed-body materials;(3)The three-dimensional model of the body and body skeleton of the steel-aluminum hybrid electric vehicle was established by using the ANSA software to remove the small features of the three-dimensional model,to extract the connection between the middle and the other,to establish the connection relation between the parts and components,Grid,create body skeleton finite element model;(4)The finite element analysis of the vehicle body skeleton of the steel-and-aluminum hybrid electric vehicle is carried out under the conditions of full load condition,ultimate twisting condition,emergency braking condition and emergency turning condition.The stiffness,strength and opening deformation rate of the body skeleton Research and interpretation,so as to find the skeleton structure of the structure and design defects;(5)In order to solve the skeleton structure and design defects found,the skeleton structure of the vehicle body is reconstructed again,and the finite element analysis is carried out to verify the rationality and feasibility of the optimization scheme.Through the above research work,the layout of the steel structure of the steel and aluminum hybrid electric vehicle is more reasonable,and the local stiffness and strength of the vehicle body are weakened reasonably and effectively,and the local stiffness and excess strength are improved reasonably. |
