Obiekt

Tytuł odmienny:

Wstępne oszacowania numeryczne wybranych efektów balistyki końcowej powstałych na skutek wybuchu pocisku moździerzowego ; Wstępne oszacowania numeryczne wybranych efektów balistyki końcowej powstałych na skutek wybuchu pocisku moździerzowego

Abstrakt:

Results of theoretical modelling of mortar projectile’s fragments propulsion were shown. Taking into account universality of application of the considered ammunition, it seems to be reasonable to conduct simulations of projectile’s fragments propulsion and interaction with the environment. In the conducted investigations, due to dynamic character of the whole phenomena, characterized by extremely high values of strains and strain’s rate, the meshless explicit approach was used (Smoothed Particle Hydrodynamics method implemented in AUTODYN software). This approach minimalized the negative effects of deformation of “classical” Lagrangian mesh. In order to validate a numerical model, the results were compared with the simplified Gurney’s formula, which provides high accuracy of fragment’s velocity for regular shapes of casing. Comparison of the results showed low value of relative discrepancy (lower than 10%) for the cylindrical part of the casing in which detonation was fully developed and resulted in higher values of relative discrepancy of initial velocity for the non – cylindrical region, especially where the detonation was not developed.
; Results of theoretical modelling of mortar projectile’s fragments propulsion were shown. Taking into account universality of application of the considered ammunition, it seems to be reasonable to conduct simulations of projectile’s fragments propulsion and interaction with the environment. In the conducted investigations, due to dynamic character of the whole phenomena, characterized by extremely high values of strains and strain’s rate, the meshless explicit approach was used (Smoothed Particle Hydrodynamics method implemented in AUTODYN software). This approach minimalized the negative effects of deformation of “classical” Lagrangian mesh. In order to validate a numerical model, the results were compared with the simplified Gurney’s formula, which provides high accuracy of fragment’s velocity for regular shapes of casing. Comparison of the results showed low value of relative discrepancy (lower than 10%) for the cylindrical part of the casing in which detonation was fully developed and resulted in higher values of relative discrepancy of initial velocity for the non – cylindrical region, especially where the detonation was not developed.

Miejsce wydania:

Warszawa
; Warszawa

Wydawca:

Wojskowa Akademia Techniczna ; Wojskowa Akademia Techniczna

Data utworzenia:

2010 r.0

Data złożenia:

2017-12-26 ; 2017-12-26

Data wydania:

2018-03-31 ; 2018-03-31

Rozmiar:

B5 ; B5

Identyfikator:

oai:ribes-88.man.poznan.pl:2492

Sygnatura:

DOI 10.5604/01.3001.0011.7178 ; DOI 10.5604/01.3001.0011.7178

ISSN elektroniczny:

2720-5266 ; 2720-5266

ISSN drukowany:

2081-5891 ; 2081-5891

Język:

angielski ; angielski

Właściciel praw:

Wojskowa Akademia Techniczna ; Wojskowa Akademia Techniczna

Strona początkowa:

49 ; 49

Strona końcowa:

60 ; 60

Tom:

9 ; 9

Słowa kluczowe:

mechanics, Gurney’s formula, mortar projectile, explosion, terminal ballistics, meshless methods ; mechanics, Gurney’s formula, mortar projectile, explosion, terminal ballistics, meshless methods