Temat: Numerical Simulation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental research and numerical analysis of 9 mm Parabellum projectile penetration of ultra-high molecular weight polyethylene layers
Badania eksperymentalne i analiza numeryczna penetracji 9 mm pociskiem Parabellum warstw polietylenowych o ultra-wysokiej masie cząsteczkowej
Autorzy:: Wiśniewski, A.
Pacek, D.
Powiązania:: https://bibliotekanauki.pl/articles/235372.pdf
Data publikacji:: 2013
Wydawca:: Wojskowy Instytut Techniczny Uzbrojenia
Tematy:: UHMWPE
numerical simulation
AUTODYN
symulacja numeryczna
Autodyn
Opis:: The paper presents results of experimental research and numerical analysis of the 9 mm Parabellum projectile (brass jacket, lead core) impact (impact velocity Vi = 365 m/s) into layers of the nonwoven polyethylene Dyneema®SB71 (100x100 mm) placed on the backing material. 3D numerical simulations with the use of the Ansys Autodyn v14 program were made. On the basis of the literature and own results of the weight drop test into ballistic plasticine (backface signature BFS = 18-24 mm) conforming to experimental tests numerical model of backing material was made. As a boundary condition in the numerical simulations of projectile impact into Dyneema®SB71 layers it was assumed loading of the tightening belt with 25 N force. In difference to experimental results in numerical simulations the front part of the jacket torn off and the core material flow outside the jacket and there were no perforated layers.
W artykule przedstawiono wyniki badań ostrzałem oraz analiz numerycznych uderzenia pocisku 9 mm Parabellum (płaszcz mosiężny, rdzeń. ołowiany, prędkość uderzenia Vi = 365 m/s) w warstwy nietkanego wyrobu polietylenowego Dyneema®SB71 (100x100 mm) umieszczonego na podłożu balistycznym. Symulacje numeryczne 3D zrealizowano w programie do analiz dynamicznych Ansys Autodyn v14. W oparciu o dane literaturowe oraz własne wyniki zrzutu swobodnego ciężarka na plastelinę balistyczną (głębokość deformacji podłoża BFS = 18-24 mm) opracowano zgodny z wynikami badań eksperymentalnych model numeryczny podłoża balistycznego. Jako warunek brzegowy w symulacji uderzenia pocisku w warstwy Dyneema'y®SB71 przyjęto obciążenie paska dociskającego siłą 25 N. W odróżnieniu od badań ostrzałem w symulacji numerycznej oderwała się przednia część płaszcza pocisku oraz nie nastąpiło przebicie żadnej z warstw wyrobu polietylenowego Dyneema®SB71.
Źródło:: Problemy Techniki Uzbrojenia; 2013, 42, 127; 55-64
1230-3801
Pojawia się w:: Problemy Techniki Uzbrojenia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Numerical-Experimental Evaluation of the Armour Protection Capabilities
Autorzy:: Wiśniewski, A.
Żochowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/403544.pdf
Data publikacji:: 2015
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: mechanics
composite armour
7.62 mm API BZ projectile
numerical simulation
Opis:: This paper presents a numerical and experimental study of a composite add-on armour panel used for protection of lightweight armoured vehicles impacted by the 7.62 mm API (Armour Piercing Incendiary) BZ projectile (2nd level of International Agreement STANAG 4569). The composite armour consists of a number of ceramic tiles supported by one layer of aramid fabric placed inside an aluminium casing. The problem of the impact of the projectile onto the composite armour has been solved in three-dimension space (3D) with the use of CAD and CAE methods implemented in Ansys Autodyn v15 software. On the basis of the results of computer simulations, the proportions of the thickness of the armour layers were chosen. After that, the real model of the composite armour was built and tested in the firing range. The results obtained in the simulations were compared with the depth of penetration (DP) tests results, and satisfying agreement was obtained.
Źródło:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2015, 6, 3 (21); 7-18
2081-5891
Pojawia się w:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Flexible Modular Armour for Protection Against the 5.56 × 45 mm SS109 Projectiles
Autorzy:: Wiśniewski, A.
Pacek, D.
Powiązania:: https://bibliotekanauki.pl/articles/403781.pdf
Data publikacji:: 2015
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: mechanics
body armour
5.56x45 mm SS109 projectile
flexible module
armour
numerical simulation
Opis:: The paper presents the results of the depth of penetration tests (DOP) and numerical simulations of the 5.56 × 45 mm SS109 projectile impact onto passive, layered armours placed on the armour backing material. Investigated passive layered armours (with dimensions 100 × 100 mm) were composed of polyester cover; soft ballistic aramid textile layers and Al₂O₃ ceramic tile placed inside rubberized aramid bag. The 5.56 × 45 mm SS109 projectile was stopped for 7-mm thick ceramic tile. In the final armour modular interlayer will be used and each module will have common area near its edges with neighbouring modules. Considering that for 7-mm thick ceramic tile, the areal density of armour equals 42.1 kg/m² . To decrease the areal density of the modular armour to the value of 20÷30 kg/m² the numerical simulations with the use of the Ansys Autodyn v15 program were performed as the base for further DOP tests. One and two-layer armours with two kinds of ceramic tiles (Al₂O₃, SiC), armour steel plate (Armox 500) and titanium plate (Ti₆Al₄V) were investigated. The results of numerical simulation for the most effective armour for protection against the 5.56 × 45 mm SS109 projectile were presented.
Źródło:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2015, 6, 2 (20); 21-40
2081-5891
Pojawia się w:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Numerical research on the special container of increased technical and design requirements
Autorzy:: Rybak, P.
Borkowski, W.
Hryciów, Z.
Michałowski, B.
Wiśniewski, A.
Wysocki, P.
Powiązania:: https://bibliotekanauki.pl/articles/242624.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: numerical research
dynamical loads
simulation
Opis:: This paper presents issues related to the process of designing a 30-feet container to be used as a mobile laboratory for collecting the environmental samples and identification of biological threats. Tactical and technical assumptions for the container, taking into account the requirements of the transport and movement of the army at long distances and in the difficult areas by means of transport characterized by increased traction properties, made the starting point. A possible way of relocation on the land roads using commonly available and military means of transport, possibilities of loading and unloading using the autonomic system and automatic levelling system are described. It describes the process of creating the MES model of the supporting structure and assumptions taken for that purpose. The basic assumption included invariability of shape, geometry and dimensions of a container compared to containers recognized in the world as the standard ones. Some results of numerical calculations carried out at two stages are presented. At the first stage, the issues on the own values were solved. Frequencies of own vibrations and associated forms of vibrations were identified. At the second stage, forced container vibrations were analysed. Resistance calculations were performed for the supporting structure of the container in the aspect of evaluation of the strain condition of the whole structure, as well as its components for assumed load variants. A variability of resistance calculations takes into account such cases as the influence of the under-container trailer riding on the uneven ground, loading and unloading a container from a trailer using autonomous system, diversity of loads on the supports resulting from the change of the ground density under the supports. A preliminary analysis of container transport possibilities and transport unit traction properties have been also carried out.
Źródło:: Journal of KONES; 2013, 20, 3; 347-352
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Numerical research on dynamic loads of wheeled armoured personnel carrier during overcoming terrain obstacles
Autorzy:: Borkowski, W.
Michałowski, B.
Rybak, P.
Wiśniewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/241735.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: numerical research
dynamical loads
wheeled armoured personnel carrier
simulation
Opis:: Paper presents the results of numerical research on the influence of the movement conditions (velocity and various types and parameters of obstacles) on the level of dynamic loads of the body shell and the vehicle crew of the basic version of Wheeled Armoured Personnel Carrier (Wheeled APC) ROSOMAK. The research work was aimed at analysis of the dynamic loads resulting from the overcoming various terrain obstacles. Kinematic constraints acting on suspension used during tests were random and deterministic, e.g. sine, cosine, triangle as well as mixed, imitating fallen tree trunk on smooth surface. Simulations were carried out with the genuine proprietary software for numerical analysis of dynamics of multi-axis vehicles equipped with independent suspension. The paper consists description of the mathematical model of multi-axis vehicle, deterministic and random generated inputs and range of performed tests. Time courses of displacement, velocity, vertical and angular (longitudinal and transverse) accelerations were determined for chosen parts of vehicle. Paper also contains time courses of deflection for every suspension wheel and dynamical reactions of the ground as well as selected time charts and cumulative statistics. Finally paper presents conclusions formulated about dynamic loads of APC ROSOMAK depending on parameters and types of obstacles and vehicle velocity.
Źródło:: Journal of KONES; 2012, 19, 4; 83-92
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Numerical Simulations of Penetration of 9 mm Parabellum Bullet into Kevlar Layers : Erosion Selection in Autodyn Program
Autorzy:: Wiśniewski, A.
Pacek, D.
Powiązania:: https://bibliotekanauki.pl/articles/403498.pdf
Data publikacji:: 2011
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: numerical simulations
AUTODYN
SPH method
Lagrange method
kevlar
9 mm Parabellum bullet
erosion in simulation
Opis:: A numerical model was performed of penetration of 9 mm Parabellum bullet into Kevlar layers, with the use of the AUTODYN software program. Simulations were conducted with a bullet modelled by means of the Smooth Particle Hydrodynamicsmethod (SPH) and with an armour coded by a Lagrange grid. The simulations were performed for 20 layers of Kevlar (one layer: thickness - 0.3 mm, surface density - 220 g/cm²) and for impact velocity of 350 m/s. The comparison included the mean velocity of the bullet (which takes into account the velocities of particles that separated from the part of the bullet penetrating the armour) and the velocities at gauge points established near the axis of symmetry of the bullet. The gauge point representative for velocity of the bullet was indicated. With regard to excessively large deformations of the grid, that caused interruption of the initial simulation, the criteria of erosion (cells removal) were introduced. From effective strains available in the AUTODYN software, the effective instantaneous geometric strain was selected. Influence of the erosion strain (value of strain for which cells are removed) onto the mass of removed cells and the residual velocity of the bullet were investigated. Simulations with neglect and respect to mass of removed cells in further calculations were performed. The erosion criteria for which further simulations should be conducted were indicated.
Źródło:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2011, 2, 3 (5); 11-20
2081-5891
Pojawia się w:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:: Biblioteka Nauki

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