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Macroscopic-microscopic collaborative optimization method of structure of material containing elliptical holes

A collaborative optimization, elliptical technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as single microscopic holes, and achieve the effect of realizing design and improving stiffness

Inactive Publication Date: 2018-09-28
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0009] In order to avoid the deficiencies of the prior art, the present invention proposes a macro-microcosmic synergistic optimization method for materials containing elliptical holes, which solves the problem of single microscopic holes in the design of porous material structures in the prior art

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  • Macroscopic-microscopic collaborative optimization method of structure of material containing elliptical holes
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  • Macroscopic-microscopic collaborative optimization method of structure of material containing elliptical holes

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Embodiment Construction

[0033] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0034] refer to Figure 1~4 , taking the L-shaped beam structure as the object of topology optimization, considering the elliptical hole angle of the porous material and the collaborative design of the structure as an example to illustrate the present invention. The method steps are as follows:

[0035] Step 1: Use a porous material unit cell with an elliptical hole, the side length of the unit cell is 1 mm, the major axis of the elliptical hole is 0.4 mm, and the minor axis is 0.2 mm. Use the homogenization method to predict the equivalent performance of the material, and establish the functional relationship between the angle parameter of the elliptical hole in the material unit cell and the equivalent performance: D H (θ)=f(θ)·D H , f(θ) is a polynomial interpolation function about the ellipse angle parameter of the porous material;

[0036] Step 2: Use th...

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Abstract

The invention relates to a macroscopic-microscopic collaborative optimization method of a structure of a material containing elliptical holes. A material unit cell containing an elliptical hole is employed, and a homogenization method is used to calculate an equivalent elastic tensor of the unit cell. For realizing collaborative design of the material holes and structure configurations, two sets of independent design variables of elliptical hole angle parameters of the porous material and the macroscopic pseudo density on a structure design domain are introduced, and relationships between thedesign variables and the equivalent porous-material elastic-tensor are established through an SIMP interpolation model. In an optimization process, an overall volume constraint is used, and overall macroscopic structure stiffness maximization is used as a target for structure topology optimization design to obtain a design result. According to the method, design of the macroscopic structure configurations and the microscopic elliptical hole angles are integrated into an optimization model, the optimization result with a practical engineering application value is obtained, and macroscopic-microscopic collaborative optimization design of the structure of the material containing the elliptical holes is realized.

Description

technical field [0001] The invention belongs to a structure macro-microcosmic synergistic optimization method of hole materials, and relates to a structure macro-microcosmic synergy optimization method of materials with elliptical holes, which is applicable to the problem of two-level synergistic optimization of macrostructure and microcosmic holes with elliptical hole materials. Background technique [0002] Porous materials are solid engineering materials containing a certain number of closed or interconnected pores, which have the advantages of low relative density, high specific strength, sound insulation, heat insulation, and good permeability. Porous materials have different hole shapes, and ellipses and triangles can be used to approximate the boundaries of holes in two-dimensional problems. [0003] Document 1 "Wang Xianjie, Zhang Xun'an. Concurrent optimization of microstructure layout and macrostructure topology of multiphase materials. Journal of Computational Mec...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 李韶英朱继宏王创张卫红周涵
Owner NORTHWESTERN POLYTECHNICAL UNIV
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