Method for designing car front longitudinal beam with hat section

Abstract

The invention, for the deficiencies in existing car front longitudinal beam design, proposes a method for designing a car front longitudinal beam with a hat section, and aims to realize controllable design of a front collision deformation mode of a front longitudinal beam with a section analysis and calculation method in an overall deformation mode of a planned longitudinal beam. The design method comprises the following steps: A, planning an overall deformation mode of the front longitudinal beam in a front collision condition: dividing the front longitudinal beam into a front telescopic crushing section, a middle Y-direction bent section, a rear micro-deformation supporting section and a rear stable extension section in sequence from front to rear; B, deriving an average crushing counterforce expression of the front longitudinal beam with the hat section; C, according to the requirements of the sections of the front longitudinal beam, designing the sections of the front longitudinal beam in sequence from front to rear; and D, according to a design result in the step C, performing simulation analysis by utilizing a computer, and according to a simulation result, confirming or modifying the design. The design thought of the method has very high practicality, so that the method also can be applied to the design of other car parts.

Description

technical field [0001] The invention belongs to the technical field of automobile safety design, and relates to the design of the front bumper structure of the front longitudinal beam. Specifically, the invention relates to a method for designing the front longitudinal beam of the automobile with a hat-shaped cross section. Background technique [0002] With the rapid growth of urban and rural residents' car ownership, road traffic accidents have become a serious public hazard that threatens human life all over the world. According to WHO analysis and prediction: by 2020, road traffic accidents will become the third largest personal threat in the world after cardiovascular disease and depression. For this reason, all developed countries in the world have made mandatory requirements for automobile collision safety , established their respective regulatory systems, and successively implemented the New Car Assessment System (NCAP: New Car Assessment Programme), aiming to furthe...

AI Technical Summary

Problems solved by technology

This method is only applicable to the design of longitudinal beams with rectangular cross-sections. In fact, at present, front longitudinal beams with hat-shaped cross-sections have been widely and successfully applied, and the method described in this invention lacks an overall plan for the overall deformation mode of the front longitudinal beams. There is no controllable design for the deformation mode of the front longitudinal member

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