Analysis method for improving modality and rigidity performance of an aluminum vehicle body based on a vehicle body joint

An analysis method and vehicle body technology, applied in instrumentation, calculation, electrical and digital data processing, etc., can solve the problems of local area deformation, affecting the normal use of the car, etc. The effect of overall weight

Active Publication Date: 2019-05-24
苏州奥杰汽车工业有限公司
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Problems solved by technology

The joint part has a great influence on the structural system, and it should maintain sufficient rigidity. Insufficient rigidity will cause large deformation in local areas, thus affecting the normal use of the car.

Method used

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  • Analysis method for improving modality and rigidity performance of an aluminum vehicle body based on a vehicle body joint
  • Analysis method for improving modality and rigidity performance of an aluminum vehicle body based on a vehicle body joint
  • Analysis method for improving modality and rigidity performance of an aluminum vehicle body based on a vehicle body joint

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Embodiment

[0046] Please refer to figure 1 , the present embodiment is an analysis method for improving the modal and stiffness performance of an aluminum body based on the body joint, which includes the following steps:

[0047] (1) Design input: The finite element model of the car body is established in HyperMesh software, and the radius of the car body is simulated by shell elements. Please refer to figure 2 , the vehicle body includes a front side rail 1, a front side rail 2 below the front side rail 1, a top side rail 3, a sill rail 4 below the top side rail 3 and a rear side rail 5, connecting the top side The A-pillar 6 and B-pillar 7 of the beam 3 and the sill beam 4, the C-pillar 8 and the D-pillar 9 connecting the top side beam 3 and the rear section sill 5, and the first beam, the second beam and the third beam on the top of the vehicle body Beams (not marked in the figure).

[0048] (2) Selection of joints at key positions: the joints at key positions include joint A unde...

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Abstract

The invention discloses an analysis method for improving modality and rigidity performance of an aluminum vehicle body based on a vehicle body joint. The method comprises the steps of using HyperMeshsoftware for carrying out finite element modeling, then grabbing key position joints in a vehicle body, establishing a joint structure finite element model, carrying out rigidity analysis under six working condition loads on a connecting element of each joint, and calculating the rigidity and the mode of the vehicle body are calculated through Nastran software; extracting a connecting piece in thekey joint for structure optimization; carrying out rigidity and modal calculation on the vehicle body for each optimization scheme to obtain an optimal optimization scheme; and conducting rigidity analysis on the key joint in the optimal optimization scheme, verifying the effectiveness of the optimization scheme through rigidity changes of the key joint before and after optimization, and therefore achieving the purposes of improving the vehicle sound rigidity and mode and reducing the overall weight of a vehicle body. According to the method, the scientificity, reliability and effectiveness of an optimization result are greatly improved, and a new idea is provided for a light-weight solution of the overall weight of the new energy automobile body in the field.

Description

【Technical field】 [0001] The invention belongs to the technical field of automobiles, in particular to an analysis method for improving the modal and stiffness performance of an aluminum body based on a body joint. 【Background technique】 [0002] From the invention of the automobile to the present, people have continuously improved and optimized the structure of the automobile in order to achieve better comfort and safety. The modal and stiffness analysis of the car body runs through the whole process of the modern car body structure design. Insufficient body rigidity will cause body door frames, window frames, engine hatches and trunk openings to deform, resulting in glass breakage and door jamming. Low stiffness is bound to be accompanied by low natural vibration frequency, which is prone to structural resonance and sound, and weakens the connection strength of structural joints. In addition, it directly affects the relative position and normal operation of the chassis a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02T90/00Y02T10/40
Inventor 宿佳敏王若满孙营舒增聪田永义
Owner 苏州奥杰汽车工业有限公司
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