Discrete optimization design method for connecting structures

A discrete optimization and design method technology, applied in the direction of computing, special data processing applications, instruments, etc., can solve the problems of ignoring the interactive influence of the genetic algorithm invoking the number of positive problems, the error of the surrogate model method, poor accuracy and other problems, to solve the design of the connection structure. problems, fewer iterations, and the effect of reducing development costs and cycles

Inactive Publication Date: 2013-07-24
HUNAN UNIV
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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 ...

Method used

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  • Discrete optimization design method for connecting structures
  • Discrete optimization design method for connecting structures
  • Discrete optimization design method for connecting structures

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0031] The discrete optimization design of tailor-welded blanks is taken as an example to describe in detail below.

[0032] figure 1 It shows a flow chart of a discrete optimal design method applicable to connection structures of the present invention. A kind of discrete optimal design method applicable to connection structure of the present invention comprises the following steps:

[0033] Step 1: Use Hypermesh to establish the finite element model of the frontal collision of the tailor-welded blank, such as figure 2 As shown, the collision velocity is determined to be 15m / s.

[0034] Step 2: Select the optimization design objectives and corresponding weights, as shown in Table 1, the constraint condition is that the specific energy absorption (SEA) is not less than 10.5 (KJ / KG).

[0035] Table 1:

[0036] indicators

sum of component masses

dash panel intrusion

Weight

1

1

Target

the smallest

the smallest

[0037] s...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李光耀孙光永田轩屹徐峰祥
Owner HUNAN UNIV
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