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A Robust Topology Optimization Design Method for Material Uncertainty Structures

A technology of topology optimization and uncertainty, applied in design optimization/simulation, computer-aided design, calculation, etc., can solve problems affecting structural safety, economy, and applicability, and achieve clear methods, high calculation accuracy, The effect of improving computational efficiency

Active Publication Date: 2022-03-25
HOHAI UNIV
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Problems solved by technology

[0003] However, in actual engineering, the uncertainty parameters are dispersed, and these uncertainties not only fluctuate with time, but also depend on the change of spatial position, so the random field model is introduced to deal with the uncertain parameters with spatial dispersion characteristics ( Such as material properties) become particularly important, the simple description of uncertain variables as random variables may lead to the configuration obtained by topology optimization may not be optimal, thus affecting the safety, economy and applicability of the structure

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  • A Robust Topology Optimization Design Method for Material Uncertainty Structures

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[0052] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0053] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including 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. It should also be understood that terms such as those defined in the general dictionary should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as herein, are not t...

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Abstract

The invention discloses a method for topology optimization design of material uncertainty structure robustness based on a random field model. The method combines a material random field model with a deterministic topology optimization model to establish a topology optimization model considering a random field of elastic modulus. The robust design structure is obtained by using the SIMP method for robust topology optimization. The present invention considers the influence of uncertain parameters with spatial dispersion characteristics on topology optimization, adopts Monte Carlo method to describe the random response of structures under the condition of uncertain parameters, and develops a non-invasive random finite element method to combine uncertain The simulation of parametric random field and deterministic finite element analysis are carried out independently, which facilitates the modification of model data and the batch calculation of finite element analysis by using Fortran program, which improves the calculation efficiency and the calculation accuracy is high.

Description

technical field [0001] The invention relates to a robust topology optimization design method of material uncertainty structure based on random field model, and belongs to the field of structure design. Background technique [0002] In recent years, with the rapid development of computers and the continuous improvement of finite element method and optimization theory, structural topology optimization design has developed rapidly. However, most of the traditional topology optimization methods are based on the deterministic assumption of parameters, ignoring the influence of material properties, loads and geometric uncertainties in actual engineering on the structural configuration, which affects the safety of the structure. Therefore, considering the influence of uncertainty factors on the results of structural topology optimization has received extensive attention from scholars at home and abroad. At present, some scholars have studied the influence of structural material pro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F113/26
CPCG06F30/23G06F2113/26
Inventor 伞冰冰贺海云邱冶
Owner HOHAI UNIV
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