Simplified vehicle body floor design method based on multi-component structural form

Abstract

The invention relates to a vehicle body floor design method, and provides a simplified vehicle body floor design method based on a multi-component structure form in order to solve the problems that anexisting single-component vehicle body floor structure designed through a topological optimization method is complex in shape, poor in economy and process feasibility and poor in vehicle body floor manufacturability. The method comprises the steps that 1, a simplified vehicle body floor initial design space finite element model is established; 2, establishing a multi-phase penalty material interpolation model for simplifying a vehicle body floor; 3, establishing a simplified vehicle body floor structure optimization target under multiple working conditions; 4, establishing material cost constraints of simplified vehicle body floor structure parts; 5, establishing processing cost constraints of simplified vehicle body floor structure parts; 6, establishing a simplified vehicle body floor topological optimization theoretical model in a multi-component structure form; according to the method, the manufacturing constraint is considered in the topological optimization process, and the multi-component form structure decomposition is realized in the topological optimization process, so that the economic benefit brought by topological optimization and the feasibility of an optimization scheme are improved.

Description

technical field [0001] The invention relates to a design method of a vehicle body floor, more precisely, the invention relates to a simplified design method of a vehicle body floor based on a multi-component structure. Background technique [0002] In recent years, with the improvement of vehicle body manufacturing process and material performance, the requirements for automobile lightweight have also been further improved. A well-designed body structure can maximize the performance of automobiles while ensuring light weight. The floor is an important supporting structure of the car body, and the ability to design a reasonable floor structure has so far affected the performance and lightweight of the vehicle. [0003] Structural optimization design is a method of optimizing certain structural parameters to obtain the best design scheme under one or more constraints. This method can find the best balance point among multiple mutually restrictive design conditions, helping en...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that the structure shape of the single-component body floor designed by the topology optimization method is relatively complex, which makes its economy and process feasibility poor, resulting in poor manufacturability of the body floor. A simplified body floor design method based on multi-component structure

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