Anti-collision beam structure optimization method based on B-spline

Abstract

The present invention discloses an anti-collision beam structure optimization method based on B-spline, and belongs to the technical field of curved surface shape structures optimization. The anti-collision beam structure optimization method based on B-spline comprises the following steps of: determining the coordinates of the first and last point of the B-spline according to the geometrical dimension of the anti-collision beam; changing a shape of the curved part by changing coordinates of control points of the B-spline; fitting B-spline curve in a finite element so as to complete the finiteelement modeling; using the Tsai-Wu tensor theory in the classical laminate strength theory so as to establish a relationship with respect to a strength of the anti-collision beam structure and obtainan intensity ratio R; taking the control point location as a design variable, using the MATLAB (Matrix Laboratory) toolbox to optimizing the intensity ratio R in a maximum direction. According to theanti-collision beam structure optimization method based on the B-spline, with regard to a problem that the structure optimization of a prior anti-collision beam is not optimized for a curved surfaceshape change of the anti-collision beam but is only optimized for parameters such as section shape, length and width, the optimization design of the complex curved surface shape is realized by changing the location parameter of control points of the B-spline.

Description

technical field [0001] The invention relates to a method for optimizing the structure of an automobile anti-collision beam, in particular to a method for optimizing the structure of an anti-collision beam based on B-splines, and belongs to the technical field of structure optimization with a curved surface shape. Background technique [0002] It is known from the prior art that during a collision of a motor vehicle body, for the safety of the passengers, it is necessary to provide an anti-collision beam, which is used to guide the forces generated during the collision in a targeted manner to the force flow path In order to ensure the stability of the internal space structure of the car and thereby protect passengers, in view of this situation, the structure of the anti-collision beam should be designed to resist bending as much as possible, and the structure of the curved anti-collision beam should not only disperse the impact force of the collision , After a collision, the ...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for optimizing the structure of anti-collision beams based on B-splines. The structural optimization of existing anti-collision beams is only aimed at the optimization of parameters such as its cross-sectional shape, length, and width, but not for anti-collision beams. The Problem of Optimizing the Shape Change of the Impingement Beam Surface

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