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Structure optimization design method and system

A technology of optimized design and structural design, applied in computing, special data processing applications, instruments, etc., can solve the problem of low grid dependence and achieve the effect of reducing intermediate links

Inactive Publication Date: 2011-05-11
吴晓军
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Problems solved by technology

[0009] In order to solve the technical problems of the existing optimal design methods, it is necessary to provide an optimal design method that can be directly applied to computer-aided design, has low grid dependence, and is suitable for various general objects.

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  • Structure optimization design method and system
  • Structure optimization design method and system
  • Structure optimization design method and system

Examples

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example 1

[0069] This example is a cantilever beam, the bottom of which is fixed and the center of the upper end bears concentration, such as Figure 5 shown. This example requires that the stiffness of the structure be maximized under the condition of satisfying certain volume constraints. The following is a step-by-step introduction in combination with the above-mentioned implementation methods:

[0070] Step 100: Establish an optimization design objective function and constraint conditions.

[0071] 110: In structural optimization, the maximum stiffness is usually transformed into the minimum flexibility, so the objective function of the optimal design in this example is flexibility, namely: ,in , for the design area, is the displacement, is the strain function of the structure and is the elasticity matrix of the system. The constraints are volume constraints, namely: ,in is the initial structure volume, is a constant coefficient in a particular problem, here ...

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Abstract

The invention provides a structure optimization design method which comprises the following steps: establishing an optimization design objective function and constraint conditions; establishing structure optimization design regions; initializing an optimization model; carrying out structural finite element analysis on the model, and calculating values of the objective function and the constraint equation according to the analysis result; analyzing the shape sensitivity, and updating the model in an appropriate evolution algorithm according to the analysis result; and carrying out other operations to ultimately obtain the optimal structure model. The invention also provides a software system using the optimization design method. The software system sufficiently implements the optimization algorithm and simultaneously provides a favorable user interface and a data interface. The optimization design method and system provided by the invention can be directly used for computer-aided design, has low grid dependence and is applicable to various common objects.

Description

technical field [0001] The invention relates to an optimal design method, in particular to an optimal design method directly applicable to computer-aided design, low grid dependency and applicable to various general objects. The present invention also relates to a system using the above optimal design method. [0002] Background technique [0003] In the current field of engineering design, the concept of optimal design has become one of the main means to reduce expenditure and increase efficiency and improve the core competitiveness of products. In the traditional manufacturing industries such as aircraft manufacturing and automobile manufacturing, the requirements for the structure and performance of key components are constantly improving, which constantly raises new issues in the field of optimization design. For example, the wing and fuselage design in the traditional aircraft manufacturing industry requires the overall design requirements of light weight and high str...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 吴晓军王煜
Owner 吴晓军
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