The Lightweight Design Of A Body In White

With the rapid development of the world economy,The number of global auto markets is increasing.At the same time,The problems of environmental pollution and energy consumption have become more and more serious.With the rapid development of the automobile industry,With the rapid development of the automobile industry,the lightweight design and optimization of the body-in-white is an effective way to solve the problems of energy consumption and environmental pollution,and ultimately achieve better energy conservation and emission reduction.At present,there are three more mature technical routes for the lightweight of automobiles: the optimization of the body structure size,the optimization of the use of new materials,and the optimization of the new molding process.The vehicle model of this project takes BIP body-in-white as the research object,and adopts sensitivity analysis method for lightweight optimization.This paper uses the industry’s main finite element software Hyper Works to establish a finite element digital model of the white body.According to sensitivity analysis of the bodyin-white model,sort out the top 30 parts of sheet metal quality sensitivity and performance sensitivity,and sort out 33 parts with high quality sensitivity,low performance sensitivity and high frequency of occurrence,the lightweight plans are formulated to improve the design efficiency of lightweight body-in-white.The lightweight scheme improves the design efficiency of lightweight body-in-white.According to the sensitivity analysis results,referring to the engineering feasibility,the material thickness dimension is optimized for the parts with high quality sensitivity,high performance and low sensitivity.For parts with high quality sensitivity,high performance and high sensitivity,while optimizing the thickness of the material,the grade of the material is improved.The project models have reduced the weight by 26.4kg and 6.52%.For the lightweight body-in-white,with reference to the pre-lightweight performance evaluation plan,the performance before and after the lightweight is compared and analyzed.After the lightweight body-in-white,the bending stiffness,torsional stiffness,the first-order torsion and bending mode,and the strength of the white body all meet the corporate standards.In order to facilitate subsequent comparison and verification of actual vehicles and reduce design changes caused by design deficiencies,the lightweight body-in-white was subjected to frontal collision simulation verification with reference to corporate standards,and the test results meet the requirements of the collision standard.This paper uses the sensitivity analysis to optimize the weight of the body-in-white.Under the premise of ensuring the performance of the body,the weight of the body is reduced,the effect of energy saving and emission reduction is realized,and the product design and development cycle is shortened.This research has certain reference significance for automobile lightweight.