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

A body floor and structural form technology, applied in design optimization/simulation, mechanical equipment, geometric CAD, etc., can solve the problems of poor manufacturability of body floor, complex shape of body floor structure, poor economy and process feasibility, etc.

Active Publication Date: 2020-04-21
JILIN UNIV
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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 r

Method used

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

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Embodiment

[0196] Embodiment: An example is given below to verify the effectiveness of this method

[0197] Based on the design method described in the description, the present invention writes a program code in MATLAB that simplifies the optimal design of the floor structure of the vehicle body. We use the present invention to simplify the vehicle body floor structure under a plurality of operating conditions (referring to Figure 9-1 , Figure 9-2 and Figure 9-3 ) is solved to obtain the multi-component structure of the simplified body floor.

[0198] First, establish a grid form with a geometric size of 36×20 (a 6×4 rectangle is removed from each of the four corners). Since the body floor structure is symmetrical, half of the design domain is taken for calculation. The unit of elastic modulus is 1, and Poisson’s ratio is 0.3 , the preset number of components is set to K=4, and the volume constraint limit is V * Set to 0.4, part material cost limit Area (k) set to 5×10 4 , part ...

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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...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/23
CPCY02T10/40
Inventor 周浩张君媛王世航舒畅刘丰宁立男王坚
Owner JILIN UNIV
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