Body-in-white lightweight optimization design method

Abstract

The invention discloses a body-in-white light weight optimization design method, and particularly relates to the field of body-in-white light weight, and the optimization design method comprises the following steps: S1, determining a single-degree-of-freedom system model, and determining a displacement curve of a system and a structure during vibration based on a structural dynamics generalized coordinate method, S2, building a system motion equation, employing a rigidity method of a direct balance method, and building a calculation model; s3, comparing equation data with the body-in-white structure, whereini inertia force FI represents braking performance data of the body-in-white structure, and elastic force FS represents bending, turning and torsion performance data of the body-in-whitestructure. By changing materials, optimizing the design method and improving the manufacturing process, the number of parts of the automobile body can be reduced by about 20-30%, the mass of the automobile body is reduced by 15-25%, the torsional rigidity is improved by 60-70%, the vibration characteristic is improved by 30-40%, meanwhile, the bending rigidity and the impact load are enhanced, and the method is direct in process, more visual in design data and better in light weight effect.

Description

technical field [0001] The invention relates to the field of lightweight body-in-white, and more specifically, the invention relates to an optimal design method for lightweight body-in-white. Background technique [0002] With the increase of car ownership and production and sales year by year, my country's dependence on foreign oil is increasing year by year. Energy saving and consumption reduction are urgent. It is difficult to use traditional design methods to improve the fuel economy of cars. However, the weight of the body is light is currently the most effective method. [0003] The existing lightweight optimization design method for body-in-white has deficiencies. It cannot reduce the number of body parts, reduce the weight of the body, increase the torsional stiffness, and enhance the bending stiffness and impact load by changing the material, optimizing the design method, and improving the manufacturing process. The process of the method is not direct enough, and th...

AI Technical Summary

Problems solved by technology

[0003] The existing lightweight optimization design method for body-in-white has deficiencies. It cannot reduce the number of body parts, reduce the weight of the body, increase the torsional stiffness, and enhance the bending stiffness and impact load by changing the material, optimizing the design method, and improving the manufacturing process. The process of the method is not direct enough, and the design data is not intuitive enough