Design method of front-end structure of automobile body in frontal 25% overlap rate collision

Abstract

The invention discloses a design method for a vehicle body front-end structure with vehicle front surface 25% overlapping ratio collision, and aims to solve the problems of design blindness in an existing optimization design process for vehicle body front-end members with vehicle front surface 25% overlapping ratio collision, and repeated modeling and long calculation time during adoption of a CAE technical means in the optimization design process. The design method for the vehicle body front-end structure with the vehicle front surface 25% overlapping ratio collision comprises the steps of 1, building an equivalent simplified model of a vehicle: 1) extracting a stiffness characteristic and an inertia characteristic; 2) parameterizing the extracted stiffness characteristic and inertia characteristic; 3) clearly determining a simulation mode of an equivalent simplified model of each member of the vehicle body front-end structure; 4) simplifying a front longitudinal beam, a front fingerboard and an auxiliary frame; 5) processing other parts of a vehicle body; and 6) verifying the equivalent simplified model of the vehicle; 2, obtaining an anti-collision design objective of the vehicle body front-end structure; 3, designing the front longitudinal beam, the front fingerboard and the auxiliary frame; and 4, performing simulation verification on front surface collision resistance of the vehicle body front-end structure after optimization design.

Description

technical field [0001] The invention relates to the field of automobile collision safety, in particular to a front-end structure design method of a vehicle body aimed at collisions with a 25% overlapping rate of the front of the automobile. Background technique [0002] According to the statistics of traffic accident types by research institutions at home and abroad, the most common type of collision is frontal collision, and its accident rate accounts for more than 50% of all collision accidents, and the occupant casualty rate caused by frontal collision is very high. The resulting human and economic losses cannot be ignored. Therefore, the safety regulations and new car evaluation regulations of various countries include frontal collision as a test item in the evaluation system, and the test conditions mainly include frontal full-width collision and frontal 40% offset collision. However, these two test conditions cannot well cover various types of frontal collision accide...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the design blindness existing in the design process of the front-end structure of the vehicle body in the collision of 25% overlapping rate of the front of the automobile and the time-consuming problem of repeated modeling and calculation when using CAE technical means. The present invention provides a A car body front-end structure design method for collisions with 25% frontal overlap rate

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