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A sensitivity optimization design method for automobile body area

A technology for optimizing design and automobile body, applied in computing, motor vehicles, instruments, etc., can solve the problems of large limitations of body structure improvement, limited optimization objects and optimization space, etc., to achieve lightweight structure, structure optimization, and improve body safety. Effect

Active Publication Date: 2019-02-05
SAIC-GM-WULING AUTOMOBILE CO LTD
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Problems solved by technology

Traditional analysis methods can only calculate the sensitivity of each part or system (multiple complete parts) of the car body. In terms of body stiffness and modal analysis, only optimization based on part thickness can be performed. The optimization objects and optimization space are limited, and the body structure can be improved. Larger limitations

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  • A sensitivity optimization design method for automobile body area
  • A sensitivity optimization design method for automobile body area
  • A sensitivity optimization design method for automobile body area

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] This embodiment takes the optimal design of the body-in-white based on the sensitivity analysis of the joint area as an example for illustration:

[0029] 1. Modeling and analysis of joint area sensitivity:

[0030] a) Establish the body-in-white stiffness or modal analysis model and debug it;

[0031] b) Establish joint area sensitivity analysis model:

[0032] Define the 11 joint attributes of the body in white and use them as analysis variables, su...

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Abstract

The invention relates to a method for optimal design of the area sensitivity of an automobile body, comprising the following steps: 1) establishing a finite element model of the body-in-white based on stiffness or mode, extracting and numbering parameters of arbitrary designated functional areas of the body; 2) defining area sensitivity variables , to establish a regional sensitivity analysis model; 3) carry out regional sensitivity analysis based on stiffness or mode, and sort the sensitivity of each region; 4) based on the ranking results of regional sensitivity, according to the strengthening of sensitive regions, weakening of insensitive regions and negative sensitive regions Optimize the regional structure and part thickness in principle; 5) Through the body-in-white performance test and optimization result verification, conduct benchmarking analysis. If the design requirements are not met, further regional structure optimization and thickness optimization are required. The beneficial effects of the present invention are: the sensitivity of each area parameter of the vehicle body to the stiffness and mode of the vehicle body can be calculated, and more targeted optimization can be performed on the area parameters of the vehicle body.

Description

technical field [0001] The invention relates to a sensitivity optimization design method for an automobile body area. Background technique [0002] In terms of body stiffness and modal sensitivity optimization analysis, the current domestic public literature is all about the analysis methods of component sensitivity. These methods are based on the thickness of a single part of the car body or the sensitivity optimization of a system (composed of multiple complete parts) design method. For example, in the patent "A Comprehensive Sensitivity Analysis Method for Automobile Body Stiffness" (Patent No. 201210167422.9), the comprehensive sensitivity analysis is a sensitivity analysis of a system composed of multiple complete parts, and its influence on the body stiffness is investigated. Traditional analysis methods can only calculate the sensitivity of each part or system (multiple complete parts) of the car body. In terms of body stiffness and modal analysis, only optimization ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50B62D65/00
Inventor 武敬伟胡朝辉吕俊成郭涛陈少伟曾土伟
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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