Influence of armoured vehicle's bottom shape on the pressure impulse

• Autorzy: Barnat W. , Panowicz R. , Niezgoda T.
• Języki publikacji: EN

Abstrakty

EN

This paper presents the results of a numerical analysis of military vehicles hulls mine resistance. The research concerns armours loaded with blast wave from large IED charges in three cases. First is an explosion in Euler domain without any boundary conditions. Second consists of Euler domain with flat bottom and the ground. Third is simulated Euler domain with ground and deflector. Boundary conditions used both in second and third case resulted in growth of the pressure impulse due to the reflection from a rigid obstacle. In the article different hull bottom shapes are compared. The gap between the bottom and the ground is fixed in all cases. Explosion in Euler domain without limitations is added as a reference. The blast wave caused by the detonation (simulated as a point detonation) propagated in cubic mesh with appropriate boundary conditions. Theoretical solution of spherical non-linearity is given in a form of Taylor equations. It was used to verify the numerical model. The research showed that the ground proximity affects the results of the simulation. The pressure impulse is amplified due to the wave reflection from both the bottom of the vehicle and the ground. As well as that, the study confirmed that the usage of the deflector considerably reduces the impact load to the structure.

Słowa kluczowe

EN

IED; improvised explosive device; mine resistance; armour; deflector; hull design; light armoured vehicle

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2011
• Tom: Vol. 18, No. 1
• Strony: 39--46
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Barnat W.

autor

Panowicz R.

autor

Niezgoda T.

• Military University of Technology, Faculty of Mechanical Engineering Department of Mechanics and Applied Computer Science Gen. S. Kaliskiego Street 2, 00-908 Warsaw, Poland tel.: [phone], fax: [phone],

Bibliografia

• [1] Barnat, W., Transporter Opancerzony Adi Bushmaster, Myśl Wojskowa 5/2005.
• [2] Trzciński, W., Trębiński, R., Cudziło, S., Investigation of the Behaviour of Steel and Laminated Fabric Plates Under Blast Wave Load, Part I: Experimental Approach, V International Armament Conference, Waplewo 2005.
• [3] Krzewiński, R., Rekrucki, R., Roboty budowlane przy użyciu materiałów wybuchowych, Polcen 2005.
• [4] Thornton, P. H., Jeryan, R. A., Crash Energy Management in Composite Automotive Structures, International Journal of Impact Engineering, Vol. 7, No 2, pp. 167-180, 1988.
• [5] Babul, W., Odkształcanie metali wybuchem, WNT Warszawa 1980.
• [6] Włodarczyk, E., Wstęp do mechaniki wybuchu, PWN, Warszawa 1994.
• [7] Dytran Theory Manual, 2004; LS-DYNA theoretical manual, 1998.
• [8] Łęgowski, Z., Rafa, J., Modelowanie wielokrotnych oddziaływań powybuchowych fal uderzeniowych na elementy konstrukcji, I Konferencja odporność Udarowa Konstrukcji Gdynia 1993.
• [9] Ls_Dyna Theory Manual, Livemore, CA, 2005.
• [10] Baker, W. E., Explosions in Air, University of Texas Press, Austin and London 1973.
• [11] Barnat, W., Wybrane problemy energochłonności nowych typów paneli ochronnych obciążonych falą wybuchu, BEL Studio, Warszawa 2010.
• [12] Barnat, W., Panowicz, R., Niezgoda T., Numerical investigation of the influence of a rigid obstacle on the multiple reflected pressure impulse, Journal of KONES, Warsaw 2010.