Research And Application Of Lightweight Design Method For Passenger Vehicle Body

Modern automobile industry development,especially passenger cars development,have brought great convenience and comfort to human life.Practice has proved that half the car quality,fuel consumption will be reduced by nearly half.passenger car Lightweight design is the main body Lightweight.This thesis open detailed description based on previous design cases,item description auto lightweight occasions and method of lightweight.This paper mainly opens on the following aspects studies.1.Structural weight loss is still a traditional weight reduction strategy.In this chapter,the weight loss of the structure has been selected only to open the weight loss hole,the material thickness of 2 cases to discuss the weight loss of the structure,but also joined the CAE analysis of the idea to carry out the simulation of the stiffness and performance of the guarantee.Under the guarantee of CAE,the structural weight loss was successfully realized.Speaking from the development process,the structure of the main departments involved in weight loss is the structural sector,CAE Department of synchronous structural design feedback modification ideas.2.Vehicle and component size optimization.Vehicle and component size optimization is also a traditional weight loss strategy.This chapter is mainly involved in the regulation of the size of the vehicle optimization,man-machine and general layout,shape,structure and other professional modifications,changes involving more professional.And the optimization of component size is the total achievement of parts is the consideration of the process feasibility based on the optimization of the design structure,material utilization and so on.Requires process and structural Department docking.Vehicle and component size optimization is a very common weight loss strategy in body weight reduction.3.Section size and force path optimization.Forward development strategy.Section size: This article through reducing the A column obstacle angle,optimize the cross-section stiffness to achieve weight loss strategy.And the force transmission path optimization used to get off the bus body longitudinal force transmission structure was optimized for weight loss strategy.The two of them with regulations,collisions,general layout with more professional.4.Replacement of materials and new materials.Materials and new materials toreplace this section is mainly through the use of lightweight materials,such as plastics,carbon fiber,aluminum magnesium alloy,such as graphene,replace to meet the vehicle or local stiffness and strength requirements and even structural strength requirements of small area5.Processing and manufacturing process,connection replacement.This chapter mainly uses the technology substitution method,using variable injection plastic,aluminum magnesium alloy to replace the modified carbon fiber,welding bonding,welding pressure riveting,laser welding to welding section change to optimize the thinking process,realize the light weight.This chapter combines weight loss strategies with materials and new materials to achieve overall weight reduction.