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Wyszukujesz frazę "Sekulski, Z." wg kryterium: Autor


Wyświetlanie 1-7 z 7
Tytuł:
Structural weight minimization of high speed vehicle-passenger catamaran by genetic algorithm
Autorzy:
Sekulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/258678.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship structure
optimization
topology optimization
sizing optimization
genetic algorithm
Opis:
Reduction of hull structural weight is the most important aim in the design of many ship types. But the ability of designers to produce optimal designs of ship structures is severely limited by the calculation techniques available for this task. Complete definition of the optimal structural design requires formulation of size-topology-shape-material optimization task unifying optimization problems from four areas and effective solution of the problem. So far a significant progress towards solution of this problem has not been achieved. In other hand in recent years attempts have been made to apply genetic algorithm (GA) optimization techniques to design of ship structures. An objective of the paper was to create a computer code and investigate a possibility of simultaneous optimization of both topology and scantlings of structural elements of large spacial sections of ships using GA. In the paper GA is applied to solve the problem of structural weight minimisation of a high speed vehicle-passenger catamaran with several design variables as dimensions of the plate thickness, longitudinal stiffeners and transverse frames and spacing between longitudinals and transversal members. Results of numerical experiments obtained using the code are presented. They shows that GA can be an efficient optimization tool for simultaneous design of topology and sizing high speed craft structures.
Źródło:
Polish Maritime Research; 2009, 2; 11-23
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-objective optimization of high speed vehicle-passenger catamaran by genetic algorithm. Part I. Theoretical background on evolutionary multi objective optimization
Autorzy:
Sekulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/259303.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship structure
multi-objective optimization
evolutionary algorithm
genetic algorithm
Pareto domination
set of non-dominated solutions
Opis:
Real ship structural design problems are usually characterized by presence of many conflicting objectives. Simultaneously, a complete definition of the optimal structural design requires a formulation of size-topology-shape-material optimization task unifying the optimization problems from these four areas and giving an effective solution of this problem. So far, a significant progress towards the solution of this problem has not been obtained. An objective of the present paper was to develop an evolutionary algorithm for multi-objective optimization of the structural elements of the large spatial sections of ships. Selected elements of the multi-criteria optimization theory have been presented in details. Methods for solution of the multi-criteria optimization problems have been discussed with the focus on the evolutionary optimization algorithms. In the paper an evolutionary algorithm where selection takes place based on the aggregated objective function combined with domination attributes as well as distance to the asymptotic solution is proposed and applied to solve the problem of optimizing structural elements with respect to their weight and surface area on a high speed vehicle-passenger catamaran structure with several design variables, such as plate thickness, scantlings of longitudinal stiffeners and transverse frames, and spacing between longitudinals and transversal members. Details of the computational models were at the level typical for conceptual design. Scantlings were analyzed using the selected rules of a classification society. The results of numerical experiments with the use of the developed algorithm are presented. They show that the proposed genetic algorithm can be an efficient multi-objective optimization tool for ship structures optimization. The paper will be published in three parts: Part I: Theoretical background on evolutionary multi-objective optimization, Part II: Computational investigations, and Part III: Analysis of the results.
Źródło:
Polish Maritime Research; 2011, 2; 3-18
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimisation algorithm for the profit from operation of a barge train versus settings of the main engine during inland navigation in varying water resistance conditions (part 2)
Optymalizacja zysku z eksploatacji śródlądowego zestawu pchanego względem ustawień silnika głównego w zmiennych warunkach oporowych drogi wodnej (część 2)
Autorzy:
Sekulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/223514.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optymalizacja zysku
śródlądowy zestaw pchany
środki transportu
środki transportu żeglugi śródlądowej
eksploatacja
inland waterway transport
barge train
optimisation
economic estimation
Opis:
The test calculations were carried out according to the profit optimisation algorithm of inland waterway transport means operation considering a division of the waterway into sectors detailed described in the first part of this work. The push barge train consists of Bizon push boat and two OBP-500W barges were used to the calculations. Before a practical application for specified economical analysis it is required to collect a huge number of data to obtain an appropriate result. The main input data consists of (i) structure of the costs and their variation in relation to engine speed, and (ii) propulsion-resistance characteristics for wide spectrum of train' draughts and waterway depths. The results of optimisation calculations confirmed correctness and usefulness of the developed algorithm.
Przedstawiono obliczenia testowe optymalizacji zysku z eksploatacji zestawu pchanego z uwzględnieniem podziału drogi wodnej na odcinki o zmiennych charakterystykach nawigacyjnych. Do obliczeń przyjęto dane dotyczące zestawu pchanego składającego się z pchacza typu Bizon oraz dwóch barek BP-500W. Otrzymanie wiarygodnych rezultatów obliczeń optymalizacyjnych wymaga zgromadzenia znacznej liczby danych łączących charakterystyki techniczne z wskaźnikami ekonomicznymi eksploatacji. Przede wszystkim należy dysponować danymi obejmującymi (i) strukturę kosztów eksploatacji zestawu i zależność składowych kosztowych od prędkości obrotowej silnika głównego, oraz (ii) charakterystyki oporowo-napędowe dla szerokiego zakresu zanurzenia zestawu oraz głębokości drogi wodnej. Wykorzystano dane opracowane w przedsiębiorstwie ODRATRANS S.A. Otrzymane wyniki obliczeń testowych potwierdziły poprawność i użyteczność opracowanego algorytmu.
Źródło:
Archives of Transport; 2011, 23, 3; 391-412
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-objective optimization of high speed vehicle-passenger catamaran by genetic algorithm. Part II. Analysis of the results
Autorzy:
Sekulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/260079.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship structure
multi-objective optimization
evolutionary algorithm
genetic algorithm
Pareto domination
set of non-dominated solutions
Opis:
Real ship structural design problems are usually characterized by presence of many conflicting objectives. Simultaneously, a complete definition of the optimum structural design requires a formulation of size-topology-shape-material optimization task unifying the optimization problems from the four areas and giving an effective solution of the problem. Any significant progress towards solving the problem has not been obtained so far. An objective of the present paper was to develop an evolutionary algorithm for multiobjective optimization of the structural elements of large spatial sections of ships. Selected elements of the multi-criteria optimization theory have been presented in detail. Methods for solution of the multi-criteria optimization problems have been discussed with the focus on the evolutionary optimization algorithms. In the paper an evolutionary algorithm where selection takes place based on the aggregated objective function combined with domination attributes as well as distance to the asymptotic solution, is proposed and applied to solve the problem of optimizing structural elements with respect to their weight and surface area for a high - speed vehicle-passenger catamaran structure, with taking into account several design variables such as plate thickness, scantlings of longitudinal stiffeners and transverse frames, and spacing between longitudinal and transversal members. Details of the computational models were kept at the level typical for conceptual design stage. Scantlings were analyzed by using the selected classification society rules. The results of numerical experiments with the use of the developed algorithm are presented. They show that the proposed genetic algorithm may be considered an efficient tool for multi-objective optimization of ship structures. The paper has been published in the three parts: Part I: Theoretical background on evolutionary multiobjective optimization, Part II: Computational simulations, and Part III: Analysis of the results.
Źródło:
Polish Maritime Research; 2011, 4; 3-13
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-objective optimization of high speed vehicle-passenger catamaran by genetic algorithm. Part II. Computational simulations
Autorzy:
Sekulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/260598.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship structure
multi-objective optimization
evolutionary algorithm
genetic algorithm
Pareto domination
Opis:
Real ship structural design problems are usually characterized by presence of many conflicting objectives. Simultaneously, a complete definition of the optimum structural design requires a formulation of size-topology-shape-material optimization task unifying the optimization problems of the four areas and giving an effective solution of the problem. So far, a significant progress towards the solution of the problem has not been obtained. An objective of the present paper was to develop an evolutionary algorithm for multiobjective optimization of structural elements of large spatial sections of ships. Selected elements of the multi-criteria optimization theory have been presented in detail. Methods for solution of the multi-criteria optimization problems have been discussed with the focus on the evolutionary optimization algorithms. In the paper an evolutionary algorithm where selection takes place based on the aggregated objective function combined with domination attributes as well as distance to the asymptotic solution, is proposed and applied to solve the problem of optimizing structural elements with respect to their weight and surface area on a high speed vehicle-passenger catamaran structure, with several design variables, such as plate thickness, scantlings of longitudinal stiffeners and transverse frames, and spacing between longitudinal and transversal members, taken into account. Details of the computational models were at the level typical for conceptual design. Scantlings were analyzed by using selected rules of a classification society. The results of numerical experiments with the use of the developed algorithm, are presented. They show that the proposed genetic algorithm can be an efficient tool for multi-objective optimization of ship structures. The paper is published in three parts: Part I: Theoretical background on evolutionary multi-objective optimization, Part II: Computational investigations, and Part III: Analysis of the results.
Źródło:
Polish Maritime Research; 2011, 3; 3-30
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimisation algorithm for the profit from operation of a barge train versus settings of the main engine during inland navigation in varying water resistance conditions (part 1)
Optymalizacja zysku z eksploatacji śródlądowego zestawu pchanego względem ustawień silnika głównego w zmiennych warunkach oporowych drogi wodnej (część 1)
Autorzy:
Sekulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/223518.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optymalizacja zysku
śródlądowy zestaw pchany
transport żeglugi śródlądowej
eksploatacja
inland waterway transport
barge train
optimisation
economic estimation
Opis:
The presented paper refers to economical aspects of inland waterway transport means operation. Specifications of profit and cost areas were a basis of an economic estimation of the transport means operation. Within this framework a decision should be taken concerning the methods and scope of an economical analysis of transport means. The profit optimisation algorithm of inland waterway transport means operation was elaborated considering a division of the waterway into sectors (representing different characteristics specified by different, and temporary changing, navigation parameters). The main engine speed was established as a decision variable.
Przedstawiona praca dotyczy aspektów ekonomicznych eksploatacji środków transportu żeglugi śródlądowej. W szczególności skupiono uwagę na prognozowaniu kosztów i zysku z eksploatacji śródlądowego zestawu pchanego. W takim kontekście decyzje dotyczące sposobu eksploatacji zestawu powinny być podejmowane z uwzględnieniem metod analizy wskaźników ekonomicznych eksploatacji. Przedstawiono i omówiono algorytm optymalizacji zysku z eksploatacji śródlądowego zestawu pchanego z uwzględnieniem podziału drogi wodnej na odcinki o różnych charakterystykach nawigacyjnych wpływających na charakterystyki ekonomiczne eksploatacji zestawu. Jako zmienną decyzyjną wybrano prędkość obrotową silnika głównego pchacza.
Źródło:
Archives of Transport; 2011, 23, 3; 369-390
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solving the problem of vehicle routing by evolutionary algorithm
Autorzy:
Iwańkowicz, R. R.
Sekulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/102797.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
vehicle routing
travelling salesman
genetic algorithm
Opis:
In the presented work the vehicle routing problem is formulated, which concerns planning the collection of wastes by one garbage truck from a certain number of collection points. The garbage truck begins its route in the base point, collects the load in subsequent collection points, then drives the wastes to the disposal site (landfill or sorting plant) and returns to the another visited collection points. The filled garbage truck each time goes to the disposal site. It returns to the base after driving wastes from all collection points. Optimization model is based on genetic algorithm where individual is the whole garbage collection plan. Permutation is proposed as the code of the individual.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 29; 97-108
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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