A Discrete Optimal Design Method Applicable to Connection Structures

Abstract

The invention discloses a discrete optimization design method for connecting structures. The method mainly comprises the following steps: creating a collision finite element model; and then, determining an optimization target, constraint conditions and design variables to be optimized, and creating a three-level orthogonal table; obtaining target response values through numerical simulation calculation, and obtaining correction response values; and finally, reasonably selecting an optimal solution through a comprehensive evaluation value. The method disclosed by the invention can be used for solving the defects that the direct problem time dispatched by a genetic algorithm is overmuch, the response surface created by an approximation model method is a continuous space, the precision is low, and the like, and the discrete optimization design method is high in precision and efficiency and is particularly suitable for discrete optimization design problem of connecting structures with various variables and various levels. The method disclosed by the invention can be further used for reasonably guiding the design of the connecting structures to improve the performance of the connecting structures.

Description

technical field [0001] The invention mainly relates to the fields of lightweight and structural design of automobile bodies, in particular to a discrete optimization design method of a connection structure. Background technique [0002] With the rapid development of the automobile industry, the requirements for fuel consumption and safety in the automobile industry are increasing day by day. With the increasing pollution of the environment, governments of various countries are also paying more and more attention to the reduction of automobile emissions. Among them, automobile lightweight as an important way to reduce automobile fuel consumption has received widespread attention. [0003] In the structure of the body, different positions of the same part require different performances, resulting in waste of materials in some positions. By means of mechanical fastening, adhesive bonding and welding / welding, the same material with different thicknesses or different materials w...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the poor accuracy of the traditional trial-and-error replacement method, ignoring the interactive influence between parts and material thickness, and the genetic algorithm calls too many positive problems, the proxy model method has errors and the constructed response surface is continuous Space and other issues

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