CAE (computer aided engineering)-based car body rigidity analysis method

Abstract

The invention relates to the technical field of computer aided engineering (CAE), in particular to a CAE (computer aided engineering)-based car body rigidity analysis method used for analyzing the bending rigidity and the torsional rigidity of a front longitudinal beam, a threshold and a rear longitudinal beam of the car body. The CAE-based car body rigidity analysis method comprises the following steps: establishing a finite element mesh model of the car body and a coordinate system; carrying out a simulation test by applying load and constraints; obtaining a processing result, and generating a curve; then, judging whether the processing result meets requirements; if the processing result meets the requirements, storing the processing result, and otherwise, establishing a finite element mesh model of the car body again to conveniently carry out a simulation test. In the method, the displacement and the torsion angle of a node are analyzed by the finite element mesh model of the car body to carry out rigidity analysis instead of calculating by selecting the node by experience, and therefore the result is more accurate; an analysis result is automatically obtained, the workload of engineers is lightened, and project development time is saved; the result can be returned to zero to make the result to be normalized, the result has high compatibility, and comparison and analysis can be conveniently carried out.

Description

technical field

[0001] The invention relates to the technical field of computer-aided engineering (CAE), in particular to a CAE-based vehicle body stiffness analysis method for analyzing the bending stiffness and torsional stiffness of front longitudinal beams, thresholds and rear longitudinal beams of the vehicle body. Background technique

[0002] The bending stiffness and torsional stiffness of a passenger car body are the ability of the body to resist bending and torsional deformation when it is statically loaded, and are used to measure the allowable deformation of the vehicle during normal driving. Most modern passenger cars adopt load-bearing body structures, which must bear various loads during use, such as torsion, bending and collision loads. Under these loads, the stiffness properties of the body play a very important role. If the rigidity of the body is insufficient, it will cause large deformations such as door frames, window frames, engine hoods, and trunk ope...

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