- Tytuł:
- Evaluation of impact of the deflector shape on effectiveness of weakening the blast wave originating from a mine or IED
- Autorzy:
-
Panowicz, R.
Nowak, J.
Konarzewski, M. - Powiązania:
- https://bibliotekanauki.pl/articles/244439.pdf
- Data publikacji:
- 2013
- Wydawca:
- Instytut Techniczny Wojsk Lotniczych
- Tematy:
-
finite elements method
simulation
military vehicles
deflector - Opis:
- The situations which our forces faced during various stabilization military missions showed that light armored vehicles are not secure enough in the case of the mine or improvised explosive devices explosion. Nowadays, the primary way of protection against this type of threat is application of a V-shape bottom in the vehicle. Such a configuration of the bottom allows dissipation of explosion energy whereby the impulse, which is transmitted to the construction – the vehicle bottom or frame, has a much lower value than in the case where the bottom is flat. In the literature it is possible to find the results of model tests on an experimental laboratory test stand. These studies show that the value of the impulse which is transmitted to the structure depends on the shape of the deflector, actually on its angle. Assuming the above condition, there were performed numerical analyses of the values of the impulse transmitted to the construction for deflectors with different angles and for a variety of loads masses. The aim of the numerical analyses was to find the optimal angle of the deflector for the considered situation. In this model, the optimal value of the angle is that in which the considered value of the impulse transmitted to the construction reaches the minimum value. For this purpose, there was made a finite element model of deflector corresponding to the conditions of the experiment. The shell elements were used in this model. The model was loaded with a pressure impulse derived from the detonation of an explosive. The blast wave interaction with the structure was modeled using the fluid structure interaction. The numerical analyses were based on the finite element method with the explicit time integration method implemented in the LS-DYNA program.
- Źródło:
-
Journal of KONES; 2013, 20, 2; 329-334
1231-4005
2354-0133 - Pojawia się w:
- Journal of KONES
- Dostawca treści:
- Biblioteka Nauki