Aluminum car body joint rigidity evaluation method based on CAE analysis

Abstract

The invention relates to an aluminum car body joint rigidity evaluation method based on CAE analysis. The method comprises the following steps of building an aluminum car body finite element model, and determining a joint reference point; according to the determined joint reference point, intercepting the aluminum car body finite element model, applying restriction and determining a loading point to obtain an aluminum car body joint model; performing rigidity processing on the aluminum car body joint model, and obtaining a rigidity joint model; calculating joint rigidity inside the aluminum car body joint model and the joint rigidity inside the rigidity joint model, then, obtaining an evaluation value of the aluminum car body joint rigidity through calculation, and evaluating the aluminum car body joint rigidity according to an evaluation value. Compared with the prior art, the aluminum car body joint rigidity evaluation method has the advantages of being small in man-made interference and high in accuracy, shortening the design cycle, lowering the design cost and the like.

Description

technical field [0001] The invention relates to the field of computer simulation design, in particular to a method for evaluating the node stiffness of an aluminum body based on CAE analysis. Background technique [0002] The joint stiffness is the key control index in the design of the car body. At present, the calculation of the joint stiffness is mainly through the intersection of the centroids of the three sections as the reference point for intercepting the boundary of the joint model, and comparing the calculated value with the empirical value in the database, and then Evaluate how high or low the joint stiffness is. There are two shortcomings in this method: one is that the centroid of the node is a point in space, and the intersection point of the centroid of the node searched by different engineers will be different. The second is that the empirical value in the database defines the range of the stiffness of the node too broadly, which involves specific models is o...

AI Technical Summary

Problems solved by technology

There are two shortcomings in this method: one is that the centroid of the node is a point in space, and the intersection point of the centroid of the node searched by different engineers will be different. The second is that the empirical value in the database defines the range of the stiffness of the node too broadly, which involves specific models The reference is not meaningful

However, the design ideas of aluminum body parts and the processing methods of solder joints and lap joints between parts have their own characteristics, so the joint stiffness evaluation method summarized in the original steel body cannot be effectively used to guide aluminum body parts. Body Design Evaluation

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