Optimization design method for sagging problem of car door based on CAE (Computer Aided Engineering) structural analysis

Abstract

The invention discloses an optimization design method for the sagging problem of a car door based on CAE structural analysis, which comprises the steps of: obtaining a design input condition from total arrangement and configuration of a car body; creating a CAD (Computer Aided Design) model by modeling software; dividing grids of the CAD model; simulating actual conditions to create a connection relationship; simulating a boundary constraint condition during an actual test of a car door assembly; carrying out solution analysis on a finite element model generated finally; comparing a result obtained by finite element simulation operation with an industry standard; if an obtained conclusion is lower than the industry standard, providing a structural optimization design; and if the obtained conclusion is higher than the industry standard, completing final design output. The method not only enhances the inspection accuracy, but also greatly reduces the period of a whole repair part so as to shorten the time of developing the whole car. Structural errors can be corrected in time by CAE analysis in early design, thereby reducing the cost of developing the whole car.

Description

technical field [0001] The invention relates to an optimal design method for the car door drooping problem, more specifically, to an optimal design method for the car door drooping problem based on CAE structure analysis. Background technique [0002] The car door is an important part of the car body, together with the car body it constitutes the seating space for the occupant. Sufficient strength and rigidity are the necessary conditions for a qualified car door. The sagging of the door, insufficient rigidity and excessive residual deformation will cause air leakage, water seepage, door vibration during driving, etc., and even cause the door to fail to close in severe cases. Therefore, it is extremely necessary to test the door stiffness and residual deformation at the initial stage of design. [0003] At present, the most common inspection method for door sagging stiffness and residual deformation is to gradually verify, evaluate, modify and optimize the design through ex...

AI Technical Summary

Problems solved by technology

[0004] Such an inspection method not only has very high requirements for the operation specifications of the experimenters, but also needs to continuously re-produce and update parts, which invisibly prolongs the development cycle of the whole vehicle, and also increases the development cost, resulting in unnecessary waste of

Images