Automobile roof ply angle optimization method based on genetic algorithm

Abstract

The invention provides an automobile roof ply angle optimization method based on a genetic algorithm, and the method comprises the following steps: S1, building an initial population of automobile roof ply parameters through MATLAB, wherein the ply parameters comprise a ply angle; s2, calling an ANSYS APDL program in MATLAB to analyze and calculate the layering angle in the initial population so as to obtain corresponding layering stress; s3, calculating a corresponding strength ratio according to the layering stress and a Tsai-Wu tensor theoretical strength ratio equation to obtain a fitnessfunction; s4, obtaining a target function according to the fitness function; and S5, establishing a mathematical model by taking the laying angle of each layer of the automobile roof laminate as a design variable, taking the standard laying angle as a constraint condition and combining the objective function, and optimizing the laying angle by utilizing a genetic algorithm according to the mathematical model. According to the invention, the optimal strength of each layer of the top cover laminated plate of the vehicle can be realized, and the inherent frequency of the top cover laminated platecan be improved.

Description

technical field [0001] The invention relates to the technical field of automobile roofs, in particular to a method for optimizing the laying angle of an automobile roof based on a genetic algorithm. 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 unsafe vehicles, innocent deaths and injuries are caused, and huge losses are caused to families and even the whole society. Under such a background, automobile safety and reliability has become the focus of attention of the whole society, and its design safety performance has practical significance. [0003] The roof of the car is easily compressed and deformed when it is under snow pressure or overturned. In order to improve the safety performance of the car body, one or two very strong roof...

AI Technical Summary

Problems solved by technology

[0005] However, due to the variability of the ply angles of the roof plywood, it is difficult in the related art to achieve optimal strength and increase the natural frequency of each ply of the vehicle’s roof plywood.

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