Aluminum body lightweight design method based on sensitivity and CAE analysis

A lightweight design and sensitivity analysis technology, applied in geometric CAD, design optimization/simulation, calculation, etc., can solve problems such as cost increase and weight reduction, and achieve the effect of strong engineering practicability

Inactive Publication Date: 2017-06-13
SUZHOU AUTO TECH +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] Although a large number of applications of new materials and new processe

Method used

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  • Aluminum body lightweight design method based on sensitivity and CAE analysis
  • Aluminum body lightweight design method based on sensitivity and CAE analysis
  • Aluminum body lightweight design method based on sensitivity and CAE analysis

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Embodiment

[0048] Please refer to Figure 1-Figure 2 , this embodiment is a lightweight design method for an all-aluminum vehicle body based on sensitivity and CAE analysis, and takes a certain type of all-aluminum vehicle body as the design object, which includes the following steps:

[0049] 1) Establish the finite element model of the all-aluminum body.

[0050] a) Using HyperMesh software pre-processing to establish a finite element model of an all-aluminum body;

[0051] b) Use the acm unit to simulate the solid welding points of the car body;

[0052] c) Triangular and quadrilateral mesh elements are used for mesh division, and the finite element model is as follows image 3 shown.

[0053] 2) Analyze the modal and stiffness of the all-aluminum body, and obtain the modal calculation value, torsional stiffness calculation value and bending stiffness calculation value.

[0054] The bending stiffness, torsional stiffness and mode of the body structure are important mechanical prop...

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Abstract

The invention discloses an aluminum body lightweight design method based on sensitivity and CAE analysis. The method comprises the following steps of 1, building an aluminum body finite element model; 2, analyzing modality and rigidity of an aluminum body; 3, building a sensitivity analysis optimization response model; 4, calculating a rigidity sensitivity coefficient, a modality sensitivity coefficient and a weight sensitivity coefficient of all components of the aluminum body; 5, according to a calculation result of the sensitivity coefficient, performing structural optimal design; 6, performing CAE analysis validation on the optimized aluminum body structure, judging whether the lightweight design objective is met or not; if yes, completing designing; if not, executing the step 5 again till the lightweight design objective is met. All structures capable of achieving the lightweight objective in the whole aluminum body structure can be analyzed, it can be efficiently verified that the optimized structure meets the requirement for modality and rigidity or not, and the efficient and reliable aluminum body lightweight design is achieved.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of vehicle design, in particular to a lightweight design method for an all-aluminum vehicle body based on sensitivity and CAE analysis. [0003] 【Background technique】 [0004] High rigidity and light weight have become the indicators pursued by today's automobile design. Relying solely on increasing component thickness to improve body-in-white bending and torsional stiffness is counter to this. Moreover, studies have shown that in the structural design of the body, increasing the thickness of the components does not necessarily improve the rigidity of the body in white. Therefore, based on the sensitivity analysis, this paper studies the contribution of each component to the stiffness of the BIW to determine the weak link of the BIW skeleton structure. And its structure is improved, so as to effectively improve the performance of the vehicle body. [0005] According to statistics, for every 10% r...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23Y02T10/40
Inventor 宿佳敏唐丹庞彦飞蔺瑞兰孙营田永义李明宋峰
Owner SUZHOU AUTO TECH
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