Parameterized Implicit Modeling and Optimization Method of Lattice Structure Based on b-spline

A technology of lattice structure and optimization method, applied in the direction of design optimization/simulation, etc., can solve the problems of large number of design variables and lack of unified parameter representation, and achieve the effect of convenient and seamless integration and guarantee of connectivity.

Active Publication Date: 2022-05-17
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the problems of lack of unified parameter representation and large number of design variables in the prior art, the present invention proposes a B-spline-based implicit modeling and optimization method for lattice structure parameterization

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  • Parameterized Implicit Modeling and Optimization Method of Lattice Structure Based on b-spline
  • Parameterized Implicit Modeling and Optimization Method of Lattice Structure Based on b-spline
  • Parameterized Implicit Modeling and Optimization Method of Lattice Structure Based on b-spline

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Embodiment Construction

[0057] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0058] refer to Figure 5 ~ Figure 8 . The invention is used for the implicit modeling and optimal design of the parameterized lattice structure. Considering that the size of the structural design area is 90mm×30mm, the horizontal direction on the left side of the area is fixed, and the vertical direction on the lower right side is fixed. The upper left of the area is subjected to a downward concentrated force F=1000N. The Young's modulus and Poisson's ratio of the solid material used in the lattice structure are E=20GPa, ν=0.3, respectively.

[0059] Step 1. For Figure 5 In the optimization problem shown, m=3 basic lattice patterns are selected, and each lattice pattern is composed of several hyperelliptic rods, including their respective width d as a de...

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Abstract

The present invention proposes a B-spline-based lattice structure parameterized implicit modeling and optimization method, first defining several basic lattice forms, then defining the basic combination lattice, and then constructing a B-spline interpolation covering the whole area Surface, this basic composite lattice is used as the control point of the B-spline surface, and any point on the two-dimensional structure corresponds to a composite lattice interpolated from the basic composite lattice. In the lattice design process, the purpose of designing the entire structural area lattice can be achieved by changing the parameters of each control point lattice. This method directly uses the known lattice patterns as the basic design elements for modeling and optimization, and can obtain various types of lattice patterns with fewer variables. Moreover, the pattern of the lattice changes freely with the position of the structure, the boundary of the optimization result is smooth, contains explicit parameter information, and can be seamlessly integrated with the existing computer-aided design software.

Description

technical field [0001] The invention relates to a modeling and optimization method of a lattice structure, in particular to a B-spline-based implicit modeling and optimization method of lattice structure parameterization. Background technique [0002] Exploring new materials and designing new structural styles are always hot topics in the new century. The birth and continuous development of 3D printing technology provides convenience for the design and manufacture of anisotropic materials and lattice structures. At the same time, experts and scholars in the field of shape and topology optimization are paying more and more attention to the design of material properties and internal lattice structures while optimizing the overall shape of the structure. Lattice structure design is widely used in cutting-edge technology fields and engineering applications because of its high design freedom and fine structure. Therefore, how to design a practical and effective lattice structur...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 张卫红徐钊王创徐仕杰朱继宏谷小军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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