Autor: Dlugosz, Adam - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Multiobjective global optimization of mechanical systems with cracks
Autorzy:: Beluch, Witold
Dlugosz, Adam
Powiązania:: https://bibliotekanauki.pl/articles/1839645.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: multiobjective optimization
crack
dual BEM
NURBS
Pareto front
Opis:: The paper is devoted to the multiobjective shape optimization of cracked structures. The two main goals are: reduction of the negative crack influence of identified cracks and optimal design of structural elements to reduce the risk of crack occurrence and growth. NURBS (Non-Uniform Rational B-Splines) curves are used to model the structure boundaries. Global optimization methods in the form of evolutionary algorithms are employed. As different optimization criteria are considered simultaneously, the efficient multiobjective optimization method are applied. An in-house multiobjective evolutionary algorithm is proposed as an efficient optimization tool. The dual boundary element method is used to solve the boundaryvalue problem.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 553-564
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Multiobjective optimiaztion of microstructure parameters in a thermoelastic porous material by means of differential evolution and elements of game theory
Autorzy:: Długosz, Adam
Schlieter, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/29520065.pdf
Data publikacji:: 2022
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: multiobjective optimization
thermoelasticity
porous materials
multiscale problem
representative volume element
differential evolution
game theory
Opis:: The paper is devoted to the optimization of the microstructure parameters of a porous medium under thermo-mechanical loading. Four different criteria related to the properties of the porous material have been proposed and numerically implemented. To solve a multiobjective problem, a novel method based on the coupling of differential evolution and elements of game theory is used. The proposed algorithm features an appropriate balance between exploration and exploitation of objective space, which is necessary for the successful optimization of these types of tasks with the use of numerical simulations. The model of the thermo-elastic porous material is composed of two-scale direct analysis based on a numerical homogenization. Direct thermoelastic analysis with representative volume element (RVE) and finite element method (FEM) is performed. Numerical example of the optimization illustrating the usefulness of the proposed method is included.
Źródło:: Computer Methods in Materials Science; 2022, 22, 3; 117-124
2720-4081
2720-3948
Pojawia się w:: Computer Methods in Materials Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Evolutionary identification of microstructure parameters in the thermoelastic porous material
Autorzy:: Długosz, Adam
Schlieter, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/1839666.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: thermoelasticity
identification
numerical homogenization
evolutionary algorithms
Opis:: The work is devoted to the identification of microstructure parameters of a porous body under thermal and mechanical loads. The goal of the identification is to determine the parameters of the microstructure on the basis of measurements of displacements and temperatures at the macro level. A two-scale 3D coupled thermomechanical model of porous aluminum is considered. The representative volume element (RVE) concept modeled with periodical boundary conditions is assumed. Boundary-value problems for RVEs (micro-scale) are solved by means of the finite element method (FEM). An evolutionary algorithm (EA) is used for the identification as the optimization technique.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 373-384
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Shape optimization of the muffler shield with regard to strength properties
Autorzy:: Jarosz, Joachim
Długosz, Adam
Powiązania:: https://bibliotekanauki.pl/articles/38903721.pdf
Data publikacji:: 2023
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: muffler shield
evolutionary algorithms
multi-objective optimization
finite element method
optimal design
Opis:: This paper is devoted to the shape optimization of the muffler shield with regard to strength properties. Three different optimization criteria are defined and numerically implemented concerning the strength properties of the shield, and different variants of optimization tasks are solved using both built-in optimization modules and in-house external algorithms. The effectiveness and efficiency of the optimization methods used are compared and presented.
Źródło:: Engineering Transactions; 2023, 71, 3; 351-366
0867-888X
Pojawia się w:: Engineering Transactions
Dostawca treści:: Biblioteka Nauki

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