A Design Method of Variable Section Beam for Body-in-White

Abstract

The invention belongs to the field of structural design of an automobile body in white, and particularly relates to a design and optimization method of a variable cross-section beam of the automobile body in white. According to the invention, the restriction of assembly and manufacture of the design of the beam cross-section of the automobile body in white is comprehensively considered; the shape of the beam cross-section is subjected to special coding control; the continuous beam cross-section shape, the scattered material thickness, the material type and the quantity of beam cross-section panels are adopted as design variable; the satisfaction of the requirements on the cross section property, the weight, the cost and the like required by the automobile body rigidity is taken as the design target, so that the cross section optimization meeting the requirement under different optimization restriction conditions is realized, the difficult problem of synchronous optimization of the variable cross-section beam is solved, and the optimization of the variable cross-section beam with multi-layer plates is realized. The invention is beneficial to the provision of a method for designing an initial variable cross-section beam structure for the automobile body, and realizes the optimization design of the variable cross-section beam; the method not only can be applied in the confirmation of a variable cross-section contour line of the beam in the automobile body concept design stage during the forward design process, but also can be used for improving and optimizing the structural performance of the existing beam.

Description

technical field [0001] The invention belongs to the field of automobile body-in-white structure design, and in particular relates to a design and optimization method of a variable-section beam of a body. The invention can be applied to the determination of the variable cross-section outline of the beam in the forward design process, and can also be used to improve and optimize existing beams based on structural performance. Background technique [0002] After 130 years of development, the automobile industry has become one of the important pillar industries that affect the development of the national economy, and its rapid development has played a huge role in promoting the country's economy. However, with the rapid increase of car ownership in various countries in the world, the consumption of non-renewable energy such as oil and natural gas is serious, and the release of harmful emissions is increasing year by year. The development of the automobile industry is facing mor...

AI Technical Summary

Problems solved by technology

The design of the thin-walled beam section of the body mainly includes the optimal design of the section shape, material and thickness. Domestic scholars have also done a lot of research work on the section design and optimization problems, but there is still relatively little work on the optimization of the variable section of the car body. For example, in the public No. 103455692A, a patent document titled "Two-step Optimum Design Method for Automobile Body Section Shape", proposes a two-step optimal design method using the box-shaped section of the automobile body as an intermediate variable, but there is nothing about the variable in this patent method. Research on Sectional Plates and Simultaneous Optimization Between Multiple Plates

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