Anti-concavity property analysis method and device based on finite element method

Abstract

The invention discloses an anti-concavity property analysis method and device based on a finite element method. The method includes the following steps: S1, obtaining a stress surface on the workpiece on which the anti-concavity property analysis will be conducted; S2, selecting a preset number of test points on the stress surface, and analyzing the maximum normal displacement produced by each test point under the action of a first normal load of a preset size; S3, selecting at least one test point with the largest normal displacement greater than the preset displacement as a loading point; S4, for each loading point, obtaining a stiffness curve of the area where the loading point is located by analyzing, and according to the stiffness curve, analyzing whether the anti-concavity property of area where the loading point is located is qualified or not. The anti-concavity property analysis method based on the finite element method can be used for the anti-concavity property analysis of the outer cover of a vehicle, a weak point on the outer cover can thus be accurately identified, and in the lightweight design, the structure is strengthened by simply sticking a glue film on the loading point, accordingly, the method is conducive to the lightweight design of the vehicle.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of reliability analysis, in particular to a dent resistance analysis method and device based on the finite element method. Background technique [0002] Anti-sag performance (referred to as anti-sag) refers to the ability of the exterior parts of the body to resist the indentation on the surface of the external load. The outer cover of economical vehicles is prone to insufficient dent resistance, which is intuitively manifested as the soft texture of the outer surface of the car body, which affects the user experience, and the outer surface of the car body is easy to produce indentations under the action of external force, which affects the appearance and is easy to damage and rust. The finite element technology is an important tool to predict and optimize the dent resistance. Using the finite element method, the weak parts of the outer covering anti-dent performance can be identifi...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a dent resistance analysis method and device based on the finite element method to solve the problem that the prior art dent resistance analysis method for the outer cover cannot accurately identify weak points on the outer cover, resulting in only The problem of reducing the actual effect of lightweight design can be strengthened by means of large-area sticking film on weak parts

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