Structural topological optimization method based on limit anisotropic lattice material
A topology optimization and anisotropic technology, applied in design optimization/simulation, computer material science, instrumentation, etc., can solve problems such as huge calculation and post-processing costs, expand the effective attribute space, save calculation time, and reduce the amount of calculation. Effect
Active Publication Date: 2021-09-03
SHANDONG UNIV
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Problems solved by technology
However, the design of lattice materials is still challenging due to the huge computational and post-processing costs, as well as connectivity issues between adjacent heterogeneous lattice materials.
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[0042] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0043] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the invention clearly states otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprise" and / or "comprise" are used in this specification, they mean indicate the presence of features, steps and / or combinations thereof;
[0044]As introduced in the background technology, there is a problem in the prior art that the effective properties of the structure filled with lattice mat...
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The invention discloses a structure topological optimization method based on a limit anisotropic lattice material, solves the problem that the physical performance of the lattice material cannot be ensured only by changing relative density or geometric parameters in the prior art, and has the beneficial effect of ensuring the structural performance. According to the specific scheme, the structure topological optimization method based on the limit anisotropy lattice material comprises the steps that on the basis of a topological optimization method, a plurality of sets of lattice material basic configurations which have different limit attributes and comprise a series of relative densities are obtained through optimization, and all the lattice material basic configurations are combined to obtain a new lattice material; an interpolation model is established; a multi-scale topological optimization mathematical model can be established, and an objective function and a constraint function of an optimization problem can be determined; on the basis of the established interpolation model, physical attributes of a lattice material in the macrostructure are obtained, finite element analysis is conducted on the macrostructure, and an objective function value is obtained through calculation; and sensitivity information of the design variable can be calculated based on the objective function and the constraint function.
Description
technical field [0001] The invention relates to the technical field related to structure optimization, in particular to a structure topology optimization method based on limit anisotropic lattice material. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] As a new type of advanced material with porous microstructure, lattice materials are increasingly used in aerospace due to their excellent properties, such as high specific stiffness, high energy absorption rate, negative Poisson's ratio, negative thermal expansion coefficient, etc. and the automotive industry. Thanks to the rapid development of additive manufacturing technology, lattice materials with complex microscopic geometric shapes have been transformed from conceptual design to actual products. This change is also accompanied by innovations in design methods. Topology optimizatio...
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IPC IPC(8): G16C60/00G06F30/15G06F30/23G06F111/10G06F119/08G06F119/14
CPCG06F30/15G06F30/23G16C60/00G06F2111/10G06F2119/14G06F2119/08
Inventor 刘继凯张乘虎李磊黄嘉奇
Owner SHANDONG UNIV