Autor: Niezgoda, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical and Experimental Comparison of Combined Multilayer Protective Panels
Autorzy:: Barnat, W.
Panowicz, R.
Niezgoda, T.
Powiązania:: https://bibliotekanauki.pl/articles/387055.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: MES (metoda elementów skończonych)
fala uderzeniowa
interakcja struktury płynu
elastomery
panel energochłonny
FEM
blast wave
fluid structure interaction
elastomers
protective panel
Opis:: The paper presents numerical and experimental analysis of combined multilayer protective panels. The developed structures are prospective solutions for enhancing protection of military vehicles and crucial elements of pipelines especially in places like river crossings.
Źródło:: Acta Mechanica et Automatica; 2012, 6, 1; 148-153
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Numeryczno-doświadczalne badania wpływu przeszkody na rozkład ciśnienia
Numerical and experimental research on the influence of an obstacle on pressure distribution
Autorzy:: Barnat, W.
Gieleta, R.
Niezgoda, T.
Powiązania:: https://bibliotekanauki.pl/articles/208822.pdf
Data publikacji:: 2010
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: wybuch
bezpieczeństwo
półsfera
blast wave
security
half sphere
Opis:: W artykule przedstawiono wyniki badań nad modelowaniem układu wybuch-półsfera. Falę uderzeniową badano w sposób numeryczny i analityczny. W celu przeprowadzenia weryfikacji uzyskanych wyników wykonano stanowisko do badań eksperymentalnych.
This paper deals with research results on the modeling of a blast wave and a half sphere configuration. Numerical and analytic methods were used to examine a blast wave. In order to verify the obtained results a stand for experimental tests was built.
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2010, 59, 1; 101-114
1234-5865
Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of a panel with an elastomer layer plus carbon fibres loaded with a blast wave
Autorzy:: Barnat, W.
Niezgoda, T.
Gieleta, R.
Panowicz, R.
Powiązania:: https://bibliotekanauki.pl/articles/247636.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: blast wave
experiment
FE analysis
elastomer layer
Opis:: Terrorist attacks are directed against the most important elements of the infrastructure and human life. Crews of the combat vehicles as well as transmission installation of oil, gas and electric energy are, first of all, exposed to such operations. Such a situation caused striving to increase the safety against the activity of short-time loads coming from explosions [l, 2]. The object of the presented investigations was a numerical-experimental analysis of an elastomer layer of the protective panel combined with an experimental verification. Developed elastomer structures constitute perspective materials and will be applied to solve the problems connected with the increase of combat vehicle safety as well as trouble constructions of pipelines and gas pipelines especially in the dangerous places such as passages over rivers. A plate with an elastomer layer (with carbon fibres) loaded with a 100 g TNT charge was subjected to the analysis. The numerical analysis was verified experimentally. The results of the conducted analyses will be applied in further works on the selection of the kinds and parameters of the energy absorbing layers. They will be also used for further validating and optimizing investigations, which will aim at absorbing or dispersion of a maximum great value of energy influencing the energy absorbing panel. Such panels can be used for constructing armoured vehicles and protective elements of stationary strategic constructions. The constructions which can be exposed to damages resulted from a different kind of dynamic forces such as impacts or influences of the pressure wave comingfrom detonation of an explosive material should have the structure enabling absorption of as great as possible part of energy which influences them. Energy absorbing elements are constructed in the form of sandwich structures coats with a specially selected core material. One of the interesting types of materials which can be used for this purpose is elastomer. These materials enable significant increasing of the protective degree due to their capacities of absorbing energy of a blast wave. Applying of these materials results in decreasing of vibrations frequency of a system loaded with a pressure impulse.
Źródło:: Journal of KONES; 2010, 17, 4; 19-26
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Numerical analysis of the influence of blast wave on human body
Autorzy:: Sławiński, G.
Niezgoda, T.
Barnat, W.
Wojtkowski, M
Powiązania:: https://bibliotekanauki.pl/articles/244503.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: improvised explosive devices
blast wave
survivability
numerical study
Opis:: Threats for military personnel during combat missions nowadays are of different sources. Further development of methods for neutralization of mines or improvised explosive devices (IED) explosions must be preceded by identification of the impact phenomenon on crew of the military vehicle. Large accelerations cause injury to a person located in the interior of the vehicle and may lead to permanent disability exempting soldiers from the battlefield. Information about overload coming from the explosion of IEDs on humans are difficult to access or not sufficiently detailed. Therefore, the basis for their acquisition is conducting experimental research and modelling. The paper is presents finite element analysis of blast wave effects on a human body simulated by a numerical 50th percentile HYBRID III dummy. Coupled Euler and Lagrange (ALE) formulations are used in the finite element analysis of such problems to accurately represent the detonation phenomenon. Numerical model was developed in LS-PrePost software. All the computational analyses were carried out using an explicit LS-DYNA solver on multiprocessor cluster. Data such as hip and knee moment of inertia, femoral force, and foot acceleration are collected from the numerical dummy, which simulates the occupant’s response. These data are then compared to injury threshold values from various references to assess survivability
Źródło:: Journal of KONES; 2013, 20, 3; 381-386
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of a protective composite panel with energy adsorbent in the form of foamed aluminium
Autorzy:: Barnat, W.
Panowicz, R.
Niezgoda, T.
Gieleta, R.
Powiązania:: https://bibliotekanauki.pl/articles/247656.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: blast wave
analytical model
FE analysis
aluminium panel
Opis:: The article presents the results of the investigations into modelling a blast wave for huge charges of l kg TNT equivalent. Modelling of huge charges is a very interesting problem due to a scale effect. During numerical analyses a detonation phenomenon was ignored (for the reason of the analysis time). The paper considers the effects of the influence of a pressure wave coming from a huge TNT charge (modelled with energy) on a 6 mm thick steel plate as well as on a protective panel made of foamed aluminium with composite layer. A panel of foamed aluminium was used for the protection of the described plate. The particular elements of a panel, subjected to an experimental analysis, were jointed with the use of a glueing method. In the numerical model the particular component layers were jointed with contact. The ALE (Arbitrary-Lagrange-Euler) function was used for coupling between the Euler domain and the Lagrange domain. The method requires absolute location compatibility of the nodes from both jointed areas. In the results of the conducted investigations, the permanent deformation of the steel plate was obtained.. Additionally, the possibility of the steel plate deformation evaluation was considered on the basis of accessible literature. Due to a huge charge, the analysis was performed with the use of the finite element method with the eiperimental verification.
Źródło:: Journal of KONES; 2010, 17, 4; 35-44
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Numerical Analysis of IED Detonation Effect on Steel Plate
Autorzy:: Barnat, W.
Panowicz, R.
Niezgoda, T.
Dybcio, P.
Powiązania:: https://bibliotekanauki.pl/articles/387041.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: fala uderzeniowa
improwizowane ładunki wybuchowe
MES (metoda elementów skończonych)
blast wave
IED
improvised explosive device
FEM
finite element method
Opis:: The article presents the results of initial works on protection of vehicles crews against improvised explosive mechanisms (charges) IED. The presented coupled problem of explosion and interaction of pressure impulse coming from detonation was described in available standard documents. The presented results are the introduction to works oncomposed protective layers applied in vehicles.
Źródło:: Acta Mechanica et Automatica; 2012, 6, 1; 10-12
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Numerical-Experimental Investigation of Squared-Based Metal Pyramids Loaded with A Blast Wave From A Small Explosives Charge
Autorzy:: Panowicz, R.
Barnat, W.
Niezgoda, T.
Szymańczyk, L.
Grzymkowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/387276.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: MES (metoda elementów skończonych)
fala uderzeniowa
interakcja struktury płynu
FEM
blast wave
flud structure interaction
Opis:: The paper presents the results of computer simulation and experimental investigation of blast wave action arising from a small explosive charge on a metal pyramid with a square base. This explicit finite element has been used to perform numerical analyses. This method is included in the Ls-Dyna software for modelling the behaviour of the pyramid exposed to the action of a pressure wave arising from the detonation of an explosive charge. The detonation process was described in programming bubble structure interaction was used to describe an influence of a blast wave on the structure.
Źródło:: Acta Mechanica et Automatica; 2012, 6, 1; 49-52
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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