CAE (Computer Aided Engineering)-based method for measuring vehicle body deformation by simulating head-on collision

Abstract

The invention relates to a CAE (Computer Aided Engineering)-based method for measuring vehicle body deformation by simulating head-on collision. The method comprises the following steps of: establishing a model based on a vehicle body structure; selecting one point from an non-deformation area in a longitudinal beam of a floor at the rear part of a vehicle body as a foundation, and creating a three-direction rigid beam unit; respectively selecting a plurality of measuring target points from a front wall baffle, a column A, an IP beam and a steering tubular column; arranging a three-direction spring unit between each measuring target point and the original point of a beam unit; loading collision conditions according to test requirements to implement the collision simulation; and outputting the deformation in each direction of the three-direction spring unit to each measuring target point of the model subjected to the collision. According to the CAE-based method, the deformations of the front wall baffle, the column A, the IP beam and the steering tubular column which are subjected to the collision are simulated through a computer so as to judge whether the vehicle body structure meets the design requirements, and the test cost in a vehicle design process can be reduced.

Description

technical field [0001] The invention relates to the field of computer-aided design, in particular to a method for measuring deformation of a vehicle body based on CAE-based frontal collision simulation. technical background [0002] The frontal collision test is a necessary item for the inspection of the car body structure. Taking the offset collision in the frontal collision as an example, the offset collision focuses on the assessment of the body structure. Since only one side of the front of the vehicle participates in the collision and absorbs energy, the The deformation of the internal structure is relatively large, and the intrusion of the passenger compartment will cause serious injury to the occupants in the vehicle. The offset collision mainly examines the structural integrity of the passenger compartment, and the specific evaluation indicators are the dash panel, the rearward movement of the A-pillar, the rearward movement of the IP beam, and the rearward and upwar...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of high test cost of automobile frontal collision test, provide a method based on CAE-based frontal collision simulation to measure the deformation of the vehicle body, carry out simulation verification on the structure design of the vehicle body, and reduce the test cost

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