Front longitudinal beam anti-collision performance design method for passenger vehicle

Abstract

The invention discloses a front longitudinal beam anti-collision performance design method for a passenger vehicle and aims at solving the problems that when the traditional trial-and-error method is used for designing the front longitudinal beam of a car in the prior art, a computer simulation model needs to be repeatedly modified, the testing needs to be repeatedly carried out, and the like. The front longitudinal beam anti-collision performance design method for the passenger vehicle comprises the following steps that 1, the average crushing counter force expression (shown as the accompanying drawing) of a multi-right-angle cross section thin wall beam is deduced, in the expression, Pm is the average crushing counter force, the unit of the Pm is kN, n is the number of the cross section right angles of the multi-right-angle cross section thin wall beam, M0 is the unit length plastic limit bending moment, the unit of M0 is N.mm, l is the cross section circumference of the multi-right-angle cross section thin wall beam, the unit of the l is mm, h is the wall thickness of the multi-right-angle cross section thin wall beam, and the unit of the h is mm; 2, the cross section of the crushing deformation part of the front longitudinal beam is designed; 3, the average bending moment expression (Mm=(0.3-0.5)Mmax) of a rectangular cross section thin wall beam is deduced, in the expression, Mm is the average bending moment of the rectangular cross section thin wall beam, and the unit of the Mm is N.mm; and 4, the cross section of the bending deformation part of the front longitudinal beam is designed.

Description

technical field [0001] The invention relates to a design method of auto parts, more precisely, the invention relates to a design method of the crashworthiness of the front longitudinal beam of a passenger car. Background technique [0002] Automobile passive safety refers to the performance that the vehicle can protect the occupants in the car or the pedestrians outside the car in case of a traffic accident, so as to prevent or minimize the damage. The car body structure can deform in a predetermined way during a collision, thereby effectively absorbing the collision energy, producing a good collision waveform that can reduce the impact damage of the occupants, provide the occupants with living space, and facilitate the matching of the occupant restraint system. The crashworthiness of the body structure is mainly determined by the frame structure composed of thin-walled beam structures and joints, which absorb most of the collision kinetic energy during a collision and provi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the traditional "trial and error method" used in the prior art, that is, the need to repeatedly modify the computer simulation model and repeatedly carry out experiments and tests when designing the front longitudinal beam of the automobile, and provides a thin-walled beam anti-corrosion Crash resistance design method of front side beam of passenger car based on crash theory

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