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Bulletin of the Polish Academy of Sciences. Technical Sciences
EN The paper presents the idea of coupled multiphysics computations. It shows the concept and presents some preliminary results of static coupling of structural and fluid flow codes as well as biomimetic structural optimization. The model for the biomimetic optimization procedure was the biological phe[...]
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Control and Cybernetics
EN This paper is concerned with simultaneous topology and shape optimization of elastic contact problems. The structural optimization problem for an elastic contact problem consists in finding such topology as well as such shape of the boundary of the domain occupied by the body that the normal contact[...]
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Computer Assisted Mechanics and Engineering Sciences
EN In the paper the structure optimization system based on the surface remodeling is presented. The base of algorithm formulation was the trabecular bone surface remodeling phenomenon leading to optimization of the trabecular net in the bone as well as the design with optimal stiffness principle. The c[...]
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Computer Assisted Mechanics and Engineering Sciences
1998 Vol. 5, nr 3 245-251
EN The paper present the axiomatic approach for solving the multicriteria optimization of thin-walled structure such as vertical cylindrical reservoirs subject to pitting corrosion. The probabilities of derivation of the compromise optimal project based on maxMin principle are investigated. The analyti[...]
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Computer Assisted Mechanics and Engineering Sciences
EN Recent advances in reliability methods, optimization as well as design sensitivity analysis have resulted in development of computational systems supporting RBDO processes for medium/large structures. For RBDO the efficiency problems are critical and in order to get the optimum design a number of fa[...]
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Computer Assisted Mechanics and Engineering Sciences
EN In most cases a safety of optimal construction may be limited by the violation of stress, buckling or displacement constraints. An unexpected exceed of these constraints may be caused by manufacturing tolerances of structural elements (differences between assumed and obtained dimensions). This requi[...]
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Journal of KONES
2013 Vol. 20, No. 1 139--146
EN In the recent years the safety and eco-friendliness have gained much of attention of the automotive stakeholders. These two characteristics are especially important in the case of mass transportation vehicles, such as buses or coaches, which are in continues use for long periods of time, covering si[...]
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Pomiary Automatyka Kontrola
2008 R. 54, nr 7 429-432
PL W artykule przedstawiono propozycje prostego w aplikacji algorytmu optymalizacji topologicznej z ograniczeniem naprężeniowym. Procedura optymalizacyjna została zaimplementowana do programu MES w postaci skryptu. Metodykę optymalizacji topologicznej zilustrowano przykładem optymalizacji konstrukcji p[...]
EN In the article a simple in application algorithm of topology optimization with stress constraint was presented (see Fig. 1). An optimization procedure in form of a FEM program script was built. The methodology of topology optimization was illustrated by an example of optimization of road vehicle str[...]
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Journal of Theoretical and Applied Mechanics
2004 Vol. 42 nr 3 585-608
PL Konstruowanie budowli o zwiększonej odporności na trzęsienia ziemi poprzez wykorzystanie rachunku prawdopodobieństwa i kryteriów eksploatacyjnych jest nowa rozwijająca się dziedzina inżynierii konstrukcji. Nowa metodologia i procedury postępowania celują w udoskonalanie istniejących programów i paki[...]
EN Earthquake-resistant design of structures using probabilistic analysis and performance-based design criteria is an emerging field of structural enginering. These new analysis and design methodologies are aimed at improving the existing practice and design codes for better prediction of the structura[...]
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Computer Assisted Mechanics and Engineering Sciences
EN This paper describes the topology and the shape optimization scheme of the continuum structures using the cellular automata simulation. The design domain is divided into small square cells. By considering the cells as the elements, the stress analysis of the structure is carried out by finite elemen[...]
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Engineering Transactions
EN This research has been conducted for the purpose of developing bionic flapping-wing aircraft. In this paper, wings are regarded as flexible, and the response issues of wings under certain excitation functions are investigated. The research is based on preliminary studies about bionic flapping wings [...]
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Zeszyty Naukowe / Akademia Morska w Szczecinie
2013 nr 34 (106) 48--58
EN The paper lists the problems hindering the use in business practices of the results of solving direct and inverse problems in linear programming. It is shown that overcoming these obstacles lies in the way of using of developed by the author and described in this paper method of structural optimizat[...]
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Control and Cybernetics
EN We study optimal layout of piece-wise periodic structures of linearly elastic materials. The effective tensors of these structures are constant within pre-specified regions, the optimality is understood as the minimum of complementary energy. The suggested formulation leads to a construction that is[...]
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Napędy i Sterowanie
2007 R. 9, nr 11 142-143
PL Wykonanie optymalnie skonstruowanego wyrobu wymaga przeprowadzenia badań testowych już na etapie projektowania. Jedną z metod, za pomocą której można wykonać element już w fazie projektowania, jest stereolitografia. Metoda ta opiera się na warstwowej budowie prototypu na bazie polimeryzacji ciekłego[...]
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Archives of Metallurgy and Materials
PL W artykule przedstawiono i przeanalizowano właściwości mechaniczne kompozytów ceramika-polimer o osnowie z ceramicznego tworzywa porowatego. Wykazano, że optymalizacja struktury takich kompozytów stwarza możliwość uzyskania materiałów o bardzo dobrych parametrach mechanicznych. W procesie optymalizo[...]
EN The results of studies concerning of ceramic - polymer composites on the porous ceramic base are presented in the paper. Wide technological possibilities of fabrication of high-porous materials allows for an optimization of the structural parameters of ceramic-polymer composites in order to achieve [...]
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Czasopismo Techniczne. Mechanika
PL Zmodyfikowana metoda optymalizacji rojem cząstek może być z powodzeniem stosowana jako uniwersalne narzędzie wspomagające optymalizację elementów konstrukcji. W artykule przedstawiono pewne aspekty przystosowania metody do rozwiązywania zadań programowania nieliniowego w przestrzeni zmiennych miesza[...]
EN A modified particle swarm optimization method can be successfully applied as a universal tool to aid optimal design of structural elements. Some improvements of the method to cope with nonlinear optimization tasks in mixed variable space are presented in the paper. Design of the helical spring, spat[...]
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Czasopismo Techniczne. Mechanika
PL W artykule przedstawiono zastosowanie techniki obliczeń równoległych oraz algorytmów ewolucyjnych do optymalizacji konstrukcji wymagającej długich czasów obliczeniowych. Zaproponowana metodyka równoległych obliczeń funkcji przystosowania dla algorytmu ewolucyjnego pozwala efektywnie przyspieszać pro[...]
EN In article the use of parallel computing in structural optimization which requires a large amount of computation time was presented and evolutionary algorithms were applied to solving optimization models. The proposed methodology of parallel calculating the fitness function of evolutionary algorithm[...]
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Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics
1999 nr 9 55-58
EN At that paper a new aerodynamic scheme "Polyplane" is suggested fog ultra high capacity aircarft and peculiarities of it's load carrying structure are investigated. The calculation schemes and results of finite element calculations are presented. The comparison with the conventional aerodynamic sch[...]
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Computer Assisted Mechanics and Engineering Sciences
EN The focus of this paper is on the development and implementation of a genetic algorithm (GA)-based software system using message passing interface (MPI) protocol and library. A customized form of simple GA used in previous research [1-4] is parallelized. This MPI-enabled version is used to find the [...]
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Systems : journal of transdisciplinary systems science
PL Przedstawiono drzewa logiczne z ustalonymi kompozycjami piętrowymi. Wykazano możliwość zastosowania tablicy morfologicznej z powtarzającymi się realizacjami odpowiednich funkcji (celów) projektowanego układu. Uwzględniono zależności pomiędzy wielowartościowościami zmiennych logicznych a zakresami zm[...]
EN The paper contains a logical analysis of multilevel variables. Thus, it is necessary to introduce the repealed realizations for functions of designed system. Then, from the morphological table of combinations we can obtain multiple — valued solutions of designed system. There is a possibility of int[...]
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