Efficient CAE simulation optimal analysis method for aluminium alloy mortise-and-tenon joint structure

Abstract

The invention relates to the field of automobiles, in particular to a CAE simulation analysis method for a car body aluminium alloy mortise-and-tenon joint structure. According to the method, beam elements are adopted to simulate an aluminium alloy profile, actual aluminium profile sections are adopted for section shape properties of the beam elements, spring units are adopted to simulate triangular plate welding reinforced fixed connection structures for a mortise-and-tenon intersecting structure of the aluminium alloy profile, and spring stiffness is based on experimental measurement. The method has the advantages that modeling is easy, preprocessing workload is small, the analysis result is accurate, calculation consumed time is short, and working efficiency is high.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a CAE simulation analysis method for an aluminum alloy mortise and tenon joint structure of a vehicle body. Background technique [0002] There are mainly three models for the existing mortise and tenon joint simulation analysis methods of aluminum alloy profiles. 1. Solid element: that is, the discrete modeling of the aluminum alloy profile is directly performed on the solid element, and the unit common node is directly used at the mortise joint or the rigid element is used to connect Two profiles. The modeling in this way is very complicated, and the pre-processing is very cumbersome. Moreover, for slender profiles, the accuracy of the simulation analysis using volume elements is not high, and the analysis results do not have good convergence. 2. Shell element: that is to extract the mid-surface of the aluminum alloy profile model, divide the shell element grid, and use the common n...

AI Technical Summary

Problems solved by technology

The section shape of the beam element in this way is simplified to a regular section, which is not consistent enough for the simulation of the actual state, and the stiffness characteristics of the mortise joint structure simulated by the way of common nodes are not consistent with the actual, and are more rigid

[0003] The above-mentioned simulation methods are currently used more simulation methods, and their common problem is that the simulation of the actual profile section is not consistent, and there are corresponding deviations. The rigidity of the simulated tenon joint structure is too rigid, which leads to the rigidity of the analysis results

Another disadvantage of solid element simulation is complex modeling, cumbersome pre-processing, large CAE model files, time-consuming analysis and calculation, and low efficiency

Another disadvantage of shell element simulation is that geometric cleaning is troublesome, modeling efficiency is low, CAE model files are slightly larger, model iteration utilization is poor, and it is not easy to change

The disadvantages of the existing beam element simulation are that the section properties are inconsistent, and the connection stiffness is too rigid

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