Method for designing front longitudinal girder

A design method, the technology of the front longitudinal beam, applied to the substructure, transportation and packaging, vehicle parts, etc., can solve the problems of low efficiency and high cost, and achieve the effect of reducing development costs, less possibility and fewer defects

Active Publication Date: 2014-05-07
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology

[0004] In order to overcome the problems of low efficiency and high cost of the design method of the front longitudinal beam in...

Method used

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  • Method for designing front longitudinal girder
  • Method for designing front longitudinal girder
  • Method for designing front longitudinal girder

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Embodiment Construction

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] The design method of the front load-bearing part of the vehicle body disclosed by the present invention comprises:

[0035] S1. Obtain the acceleration-time curve and the crushing distance-time curve of the benchmark vehicle during a frontal collision;

[0036] S2. The length from the front end of the front side beam of the target vehicle to the front end of the powertrain is X; combine the crushing distance-time curve to obtain the first moment t when the crushing starts 0 , and the corresponding second moment t when the crushing distance is X 1 ;

[0037] S3....

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Abstract

The invention provides a method for designing a front longitudinal girder. The method includes the steps of (1) obtaining an acceleration-time curve and a conquassation distance-time curve during head-on collision on a benchmarking vehicle, (2) enabling the length from the most front end of the front longitudinal girder of a target vehicle to the front end of a power assembly to be X, and obtaining a first moment t0 when conquassation begins to occur and a corresponding second moment t1 when the conquassation distance is X in cooperation with the conquassation distance-time curve, (3) obtaining a constant equivalent acceleration a of the benchmarking vehicle within the t0-t1 time period, (4) obtaining the testing mass m of the target vehicle, and obtaining equivalent balance collision force F borne by the target vehicle within the t0-t1 time period, (5) obtaining equivalent collision force borne by the front longitudinal girder within the t0-t1 time period according to the specific gravity of collision force borne by the energy absorption section, from the most front end of the front longitudinal girder to the front end of the power assembly, of the front longitudinal girder, and (6) obtaining the length, the width, the wall thickness and the material parameters of the cross section of the front longitudinal girder according to the equivalent collision force borne by the front longitudinal girder within the t0-t1 time period. The method for designing the front longitudinal girder is high in efficiency and low in cost.

Description

technical field [0001] The invention relates to a design method of a front longitudinal beam. Background technique [0002] At present, the mainstream design idea of ​​the front longitudinal beam structure at home and abroad is "reference for benchmarking vehicles - digital model of the first version of the structure - structural improvement". The specific method steps of this design idea are as follows: first, the vehicle integration engineer selects the powertrain type, chassis design and engine compartment layout of the target vehicle; secondly, the body design engineer refers to a large number of vehicles of the same level, and selects a The representative car is used as the benchmarking car, and then the size and material of the benchmarking car are referred to, supplemented by the engineer's previous experience, to design the first version of the CAD 3D digital model of the body structure of the target car. Then comprehensively obtain the CAD digital model of the engi...

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Application Information

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IPC IPC(8): B62D21/02
Inventor 王玉超岳鹏陈琪
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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