BIW Of Foton U201 Weight Reduction Optimization Study Based On CAE

With the rapid increase in global car ownership,car team growing awareness of human energy,the environment and the growing impact of traffic safety.In the current use of fossil fuels are still the premise,lightweight vehicle fuel consumption and emissions is to solve the problem of the most effective and most direct measure,its purpose is to meet the stiffness,modal,crash safety,fatigue life and NVH performance factors under the premise,by optimizing the material,structure or process improvements,reduce their weight.Because of the vehicle's body mass than the proportion accounted for 30% of the automotive industry to focus on becoming the subject of this purpose lightweight body.Based on domestic and international research literature on car lightweight,the Foton U201 body is taken for example to carry out performance analysis and design optimization of its structure,and achieved 4.2 Kg weight reduction achievements,but also for subsequent lightweight accumulated work experience.The main contents are as follows: 1.Combining the basic theory of finite element,FEM of the body during the key issues are described,such as the simplified model,meshing,the quality control unit.2.A lightweight scheme reducing weight is acquired with the part thickness of the BIW as the design variables and the strength,stiffness and low-order modal frequency as constraints.The performance meets the requirements through stiffness and mode analysis of optimized body structure.3.Approximation model established by the empirical formula between design parameters and performance metrics to achieve rapid evaluation of lightweight program to improve the optimization efficiency.4.Isight optimized application platform is built of lightweight BIW simulation and optimization process,considering the stiffness,modal,strength and crash performance requirements and other disciplines,global optimization and provides a variety of possible solutions.