Optimal design method for spliced and welded plate automobile door

Abstract

The invention relates to an optimal design method for a spliced and welded plate automobile door, and aims to rationally design the spliced and welded plate automobile door, reduce the number of parts, reduce the weight of the automobile door, improve the rigidity of the automobile door and improve the collision safety of an automobile. The optimal design method comprises the following steps of: determining arrangement of weld lines of the spliced and welded plate automobile door by a bidirectional progressive topological optimization method, namely the design of a splicing and welding scheme; after specific positions of the weld lines are determined, namely the splicing and welding scheme is determined, dividing an inner plate of the automobile door into several regions by the weld lines, wherein the regions represent spliced and welded plates of different thicknesses; and constructing an automobile door system light-weight optimal model based on different working condition responses by a sensitivity analysis method and a size optimization method, performing optimal calculation, and determining the specific thickness of each spliced and welded plate of the inner plate of the automobile door.

Description

technical field [0001] The present invention relates to an optimal design method for a tailor-welded blank car door, in particular to a layout of weld lines for a tailor-welded blank car door based on a two-way progressive topology optimization method, that is, the design of a tailor-welded blank scheme, on which size optimization is adopted The method further determines the specific thickness value of each tailored welded blank sheet. Background technique [0002] In recent years, the number of automobiles in the world is increasing day by day, which affects and changes people's work and lifestyle to a greater extent. However, the automobile industry is also facing a series of problems such as energy shortage and environmental pollution. Saving energy and reducing environmental pollution have become automobile There are two core problems that the industry needs to solve urgently. According to statistics, for every 10% weight loss of a car, the fuel consumption can be reduc...

AI Technical Summary

Problems solved by technology

However, the relevant research results are not enough to guide the design of tailor-welded blank parts, which greatly restricts the promotion and application of tailor-welded blank technology

In particular, there is no effective method for determining the optimal position of the weld line

In the traditional method of tailor-welded blank car door design, the layout of the weld line is mainly determined based on experience, that is, the determination of the tailor-welded scheme; after the tailor-welded scheme value is determined, the trial-and-error method is used to continuously replace each tailor-welded The material and thickness of the plate until the performance requirements of the tailor-welded blank door are met, the entire design process is time-consuming and expensive

Moreover, it is difficult to achieve the optimal performance of tailor-welded blank doors designed by traditional design methods (such as crash safety, sag stiffness, and torsional stiffness, etc.)

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