Autor: Janota, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wykorzystanie metody CFD do obliczania natężenia przepływu medium w zaworach przelewowych sekcji obudowy zmechanizowanej
The use of the CFD method to calculate the fluid dynamics in by-pass valves of power supports
Autorzy:: Janota, M.
Władzielczyk, K.
Powiązania:: https://bibliotekanauki.pl/articles/187271.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
Tematy:: sekcja obudowy zmechanizowanej
metoda CFD
natężenie przepływu
power support
CFD method
fluid dynamics
Opis:: W artykule przedstawiono możliwości i sposób obliczania przepływu medium przez zawory przelewowe stosowane w układzie hydraulicznym sekcji obudowy zmechanizowanej. Dla przykładowego zaworu DN10/ø4,5 zostały wykonane obliczenia natężenia przepływu medium za pomocą programu AUTODESK SIMULATION CFD 2013. Wyniki tych obliczeń porównano z rezultatami obliczeń uzyskanych drogą analityczną. Pozwoliło to na wyciągnięcie wniosków dotyczących dokładności obu metod obliczania wartości natężeń przepływu medium przez zawory przelewowe.
The article features the possibilities and method to calculate the dynamics of fluids passing through by-pass valves used in a hydraulic system of power supports. For a sample DN10/ø4,5 valve the dynamics of the passing fluid was calculated with the use of the AUTODESK SIMULATION CFD 2013 program. The results were compared with the results of calculations made with the use of an analytical method. This allowed to draw some conclusions about the accuracy of both methods.
Źródło:: Mechanizacja i Automatyzacja Górnictwa; 2014, R. 52, nr 5, 5; 49-55
0208-7448
Pojawia się w:: Mechanizacja i Automatyzacja Górnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Learning Search Algorithms: An Educational View
Autorzy:: Janota, M.
Šimák, V.
Hrbček, J.
Powiązania:: https://bibliotekanauki.pl/articles/116502.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Search Algorithm
Learning Search Algorithms
educational view
Artificial Intelligence Method
Search Method
Labyrinth
Dijkstra algorithm
Opis:: Artificial intelligence methods find their practical usage in many applications including maritime industry. The paper concentrates on the methods of uninformed and informed search, potentially usable in solving of complex problems based on the state space representation. The problem of introducing the search algorithms to newcomers has its technical and psychological dimensions. The authors show how it is possible to cope with both of them through design and use of specialized authoring systems. A typical example of searching a path through the maze is used to demonstrate how to test, observe and compare properties of various search strategies. Performance of search methods is evaluated based on the common criteria.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8 no. 4; 565-570
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Comparison of Two Model Coupling Methods for Joint Identication
Autorzy:: Susen, J.
Sulitka, M.
Sindler, J.
Janota, M.
Powiązania:: https://bibliotekanauki.pl/articles/99775.pdf
Data publikacji:: 2015
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
mutlibody model
component coupling
harmonic analysis
Opis:: An experimental identification of joint dynamic properties requires accurate models of the joined bodies and an appropriate model coupling method. The bodies to be coupled can be described by their mass, stiffness and damping matrices (M, K, C) or by receptance matrices. Each approach has its advantages and disadvantages. The receptance matrix method requires a high number of measurements. However the measured data can be used directly and no model identification is needed. The experimental identification of the M, K, C matrices feasible for creating precise coupled models is difficult. Therefore, an approach based on a verified FE model can be employed. The two methods of model identification and coupling are discussed using a case study of two bolted beams. Several ways of the receptance matrices measurement simplification and their influence on the accuracy of the results are studied. The effect of noise, measured FRF peak accuracy and data filtering on the resulting coupled receptance matrix is studied as well. The results obtained by the receptance matrix method are compared to the results obtained by the method of coupling the verified FE models. It has been found that the method based on coupling the verified M, K, C matrices proves to be a more reliable approach, which will allow a more precise joint dynamic model identification in the next step.
Źródło:: Journal of Machine Engineering; 2015, 15, 1; 58-70
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Application of fibre composites in a spindle ram design
Autorzy:: Kulisek, V.
Janota, M.
Ruzicka, M.
Vrba, P.
Powiązania:: https://bibliotekanauki.pl/articles/99939.pdf
Data publikacji:: 2013
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: carbon fibre reinforced plastics
finite element analysis
experimental modal analysis
Opis:: When compared to steel or cast iron, carbon fibre composites offer excellent tensile and bending stiffness together with significantly smaller density. Research at the Research centre of Manufacturing Technologies in Prague has been aimed at the application of composite materials in structural parts design. Case studies on spindle rams were performed focusing on the design of experimental composite spindle rams and their benchmarking with reference steel components. The cross-section of both parts was 350x350mm and the length was 1200mm. The first design was made as a thick-walled composite body with a minimal amount of steel. The goal was to achieve static stiffness comparable to a reference steel component of the same size. The second design was manufactured as a hybrid structure composed of fibre composites with cork layers and bonded steel reinforcements. The goal was to improve damping of the structural parts in comparison with the steel components. Results of stiffness and modal properties were obtained from experiments and also using FEA. Experimentally obtained damping ratios of composite and reference steel rams were compared with and without the effect of connection interfaces on damping.
Źródło:: Journal of Machine Engineering; 2013, 13, 1; 7-23
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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