Ply optimization design method of vehicle anti-collision beams

An optimized design, anti-collision beam technology, applied in the field of layup angle optimization design of carbon fiber composite anti-collision beam, can solve the problems of social loss, death and injury, vehicle insecurity and so on

Inactive Publication Date: 2018-02-23
JIANGSU UNIV OF TECH
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Problems solved by technology

But at the same time, it also leads to frequent traffic accidents. Because of the unsafe vehicles, it leads to innocent deaths and injuries, causing huge losses to families and even the whole society.

Method used

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  • Ply optimization design method of vehicle anti-collision beams
  • Ply optimization design method of vehicle anti-collision beams
  • Ply optimization design method of vehicle anti-collision beams

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Embodiment Construction

[0035] Such as Figure 1 to Figure 3 As shown, an optimization design method for automobile anti-collision beam pavement, the optimization elements are:

[0036] 1. Design variable: In the optimization process of the laminate, the variable is the ply angle of each layer of the laminate. By changing the value of the ply angle of each layer, the overall structural performance of the laminate is changed;

[0037] 2. Constraints: In the process of chromosome coding, the plies used are standard ply angles of 0°, ±45°, and 90°. In MATLAB coding, an integer code is used to represent the ply angle, respectively using [0 / 1 / 2 / 3] indicates the ply angle [-45° / 0° / 45° / 90°];

[0038] 3. Fitness function: According to the Cai-Wu tensor theory strength ratio equation:

[0039] (F xx σ 2 x+ 2F xy σ x σ y +F yy σ 2 y +F ss τ 2 xy )R 2 +(F x σ x +F y σ y )R-1=0 (1)

[0040] The single layer with a smaller strength ratio is the first to fail, that is, the first failure layer;...

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Abstract

The invention discloses a ply optimization design method of vehicle anti-collision beams. The method comprises the step of structural analysis of the anti-collision beams of a carbon fiber composite material. During CFRP structural design, since the ply angle sequences are variable, an optimum design scheme cannot be obtained. According to the technical scheme, the ply angles serve as design variables; the standard ply 0 degree, + / - 45 degrees and 90 degrees serve as constraint conditions; an objective function is built according to a Tsai-Wu tensor theoretical strength ratio equation; makingthe strength of the anti-collision beams maximal serves as an optimization target, and the ply angle sequences in an anti-collision beam lamination board are determined. By means of the ply optimization design method of the vehicle anti-collision beams, a MATLAB is utilized to write a main program, while ANSYS software is called, node stress is analyzed and calculated, the operation returns to theMATLAB, and the strength ratio is calculated. When the strength ratio is optimal, the optimization target is achieved.

Description

technical field [0001] The invention relates to a laminated plate design of an automobile anti-collision beam, in particular to a layer angle optimization design method of a carbon fiber composite material anti-collision beam. Background technique [0002] With the development of economy and society, people's living consumption level has been significantly improved, and private cars have become the main body of people's daily life. But at the same time, it also leads to frequent traffic accidents. Because of the unsafeness of vehicles, innocent people are killed and injured, and huge losses are caused to families and even the whole society. In this context, the safety and reliability of automobiles has become the focus of the whole society, and it also has practical significance in terms of its design safety performance. [0003] The function of the anti-collision steel beam is that when the car is hit by the side, the door is easily deformed by the impact. In order to impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/12
CPCG06N3/126G06F30/15
Inventor 周金宇臧杰刘成龙邱睿
Owner JIANGSU UNIV OF TECH
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