Numerical Simulations of 122 mm M-21OF Missile Fragments Propulsion

• Autorzy: Imbierowicz Wojciech , Fikus Bartosz

Identyfikatory

DOI

10.5604/01.3001.0054.6154

Warianty tytułu

PL

Badania numeryczne procesu napędzania odłamków 122 mm rakietowego pocisku M-21OF

• Języki publikacji: EN

Abstrakty

EN

This paper presents numerical simulations of 122 mm M-21OF rocket fragments propulsion. A simplified geometry of the rocket was constructed and analysed with two main numerical FE approaches: a mesh-based lagrangian-eulerian FSI method and a coupled meshless SPH-lagrangian approach. The resulting fragment velocities were compared with those obtained from an analytical approach (Gurney formula). The shell fragmentation process was also successfully depicted. Both numerical approaches differed from the analytical velocity results to a comparable degree. Considering that the Gurney energy of a high-explosive is obtained from cylinder expansion tests, results obtained with the Gurney method can be treated as a reference point and validation method for natural fragmentation warhead models.

PL

W pracy przedstawiono badania numeryczne procesu napędzania odłamków 122 mm rakietowego pocisku M-21OF, który jest podstawowym środkiem bojowym polskiej artylerii rakietowej, jednak skuteczność jego głowicy bojowej nie została zadowalająco przebadana. Opracowano uproszczoną geometrię pocisku, którą przeanalizowano za pomocą dwóch głównych podejść numerycznych: siatkowej metody lagrange'owsko-eulerowskiej ze sprzężeniem płyn-ciało stałe (FSI - Fluid Structure Interaction) oraz sprzężonego bezsiatkowego podejścia SPH (Smoothed Particle Hydrodynamics) z siatkowym opisem lagrange'owskim. Uzyskano wartości prędkości początkowych odłamków, które porównano z prędkościami uzyskanymi analitycznie ze wzoru Gurneya. Odwzorowano także proces fragmentacji pocisku. Oba podejścia numeryczne różniły się od wyników analitycznych w niewielkim, porównywalnym stopniu. Biorąc pod uwagę, że energia Gurneya materiału wybuchowego jest wyznaczana z badań doświadczalnych, wyniki uzyskane metodą Gurneya mogą być traktowane jako punkt odniesienia i metoda walidacji wyników uzyskanych dla modeli cylindrycznych głowic bojowych o naturalnej fragmentacji.

Słowa kluczowe

EN

mechanical engineering; terminal ballistics; numerical simulation; initial fragment velocity; LS-DYNA

PL

balistyka końcowa; inżynieria mechaniczna; badania numeryczne; prędkość odłamków; LS-DYNA

• Wydawca: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
• Rocznik: 2024
• Tom: Vol. 15, Nr 2 (56)
• Strony: 55--70
• Opis fizyczny: Bibliogr. 33 poz., rys., tab.

Twórcy

autor

Imbierowicz Wojciech

• Military University of Technology, Faculty of Mechatronics, Armament and Aerospace, 2. Gen. Sylwestra Kaliskiego Str., 00-908 Warsaw, Poland

autor

Fikus Bartosz

• Military University of Technology, Faculty of Mechatronics, Armament and Aerospace, 2. Gen. Sylwestra Kaliskiego Str., 00- 908 Warsaw, Poland

• https://orcid.org/0000-0002-0383-6984

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