Front impact conceptual model design method for front structure of automobile

Abstract

The invention discloses a front impact conceptual model design method for a front structure of an automobile. The front impact conceptual model design method for the front structure of the automobile includes that simplifying the front impact concept design for the automobile through building a lumped parameter model for the front of the automobile, and evaluating the impact resistance of the automobile at the concept design stage to regulate the axial impact resistance rigidity distribution of the automobile body and reinforce the impact resistance; building a multi-degree of freedom LPM consistent with the finished automobile structure at the concept design stage, and assigning a piecewise linear power-displacement relationship and a nonlinear moment-rotation curve to a corresponding spring unit in the LPM to define the axial impact rigidity and bending characteristics of the LPM. The front impact conceptual model design method for the front structure of the automobile simultaneously generates axial crushing and plastic bending deformation, realizes full automation, is capable of well meeting the demands on the impact resistance analysis for the automobile body in the automobile concept design stage, assists a designer in quickly building the LPM of the automobile, realizes to quickly evaluate and correct a primary design proposal, and enables the design period to be shortened.

Description

technical field [0001] The invention belongs to the technical field of automobile body design, and relates to a design method for a frontal collision conceptual model of an automobile front structure, in particular to a design method for a frontal collision conceptual model of an automobile front structure based on a centralized parameterized model. Background technique [0002] Body structure design is usually divided into two stages: conceptual design and detailed design. The main task in the conceptual design phase of the frontal crash of a vehicle is to determine the arrangement of the energy-absorbing components of the vehicle body and the distribution of the crashworthiness stiffness. As one of the four major assemblies of automobiles, the body structure is an important part of automobile design and an important carrier to ensure the safety performance of automobile collisions. Structural crashworthiness is an important index to evaluate the safety performance of auto...

AI Technical Summary

Problems solved by technology

Similar to the spring unit of the vehicle LPM in the prior art, elastic materials are used, which will cause the mass block to rebound during the collision process, resulting in corresponding errors

Moreover, in the prior art, the stiffness assignment of the force-displacement relationship curve for the spring unit of the LPM is mostly defined according to the test data or simulation results, which belongs to the reverse concept design, and has little guiding significance for the detailed design stage of new models.

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