A whole vehicle head-on collision simulation suspension and a failure method thereof

Abstract

The invention discloses a whole vehicle head-on collision simulation suspension and a failure method thereof. The method comprises the following steps: 1, inputting suspension failure force; through collision test output or suspension engineers, shear failure force and pull-out force of the metal casting cantilever under high-speed impact are provided; the tensile strain of the sheet metal part isobtained through a material tensile test; 2, building a suspension failure model; wherein the sleeve and the first mounting bracket are suspended; the second mounting bracket uses a shell unit; connecting the suspension model. The method comprises the steps that firstly, a sleeve is arranged in a suspension failure model, the sleeve is coupled with a rubber node, the built suspension failure model is connected to a vehicle body and a power assembly system through Bolt according to the input failure force, a complete vehicle front collision model is built, thirdly, the model is debugged, debugged, calculated and analyzed, a result is subjected to post-processing, and a key curve, pictures and animations are output. According to the invention, a rubber (MAT7 MAT-BLATZ-KO-RUBBER) material isadopted, so that the problem of failure when the suspension is subjected to front high-speed impact can be effectively improved, and a real collision process can be better reflected.

Description

technical field [0001] The invention relates to the technical field of computer-aided engineering (CAE), in particular to a vehicle frontal collision simulation mount and a method for its failure. Background technique [0002] The passive safety of automobiles is an essential link in the development of automobiles. With the development of numerical simulation technology, using computer-aided engineering (CAE) simulation to simulate vehicle collisions has become an important method to improve passive safety of automobiles, and it also solves the problem of collisions. The problem of high cost and long period of physical experiment. The vehicle crash model is composed of multiple assembly systems. During the crash analysis process, the components of each system deform and move according to the material properties and the contact relationship between them. As a system with relatively large mass and rigidity, the powertrain has the most obvious impact on vehicle acceleration an...

AI Technical Summary

Problems solved by technology

The failure of the mount will affect the motion behavior of the powertrain during the collision process, while the traditional modeling method often ignores the failure of the mount due to the impact, resulting in a large difference between the simulation results and the test results, which cannot reflect the real collision process

[0004] Therefore, it is necessary to design a method for simulating the failure of powertrain rubber mounts in the vehicle frontal crash CAE model that is different from the traditional method and can solve the problems of high cost and long period of crash tests.

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