Influence of the shape of the explosive charge on blast profile

• Autorzy: Hryciów Z. , Borkowski W. , Rybak P. , Wysocki Z.

Identyfikatory

DOI

10.5604/12314005.1130466

• Języki publikacji: EN

Abstrakty

EN

When an explosive charge is fired, the nature and mass of the explosive are the only parameters of importance usually considered. The shape however, also plays a major role in the effect of an explosive charge. Knowledge of shape effect can be important before the use of the explosive (in order to create a maximum effect with a given mass of explosive), or in post-explosion damage assessment. The shape effect however is only significant within a certain range from the charge. At longer distance, the produced blast wave tends to be spherical. The shock wave parameters studied in this work are the peak overpressure and the first positive impulse. A series of numerical test has been performed in order to determine the range of influence of the charge shape. Different locations of initiation were compared. A hemispherical charge was point detonated at its centre whereas a cylindrical shape was detonated at the centre of an upper or lower plane. Numerical simulations of near field burst were conducted using LS-DYNA software. During numerical tests a pressure fields were determined for different shapes of explosive charges as well as the pressure waveforms at points located 1000 mm from a centre. Additionally, reference pressure history curves from LOAD_BLAST_ENHANCED procedure were calculated.

Słowa kluczowe

EN

cylindrical and rectangular charge; blast overpressure; blast impulse; LS-DYNA; ALE

• 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: 2014
• Tom: Vol. 21, No. 4
• Strony: 169--176
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Hryciów Z.

• Military University of Technology Kaliskiego Street 2, 00-908 Warszawa, Poland tel.: [phone], fax.: [phone]

autor

Borkowski W.

• Military University of Technology Kaliskiego Street 2, 00-908 Warszawa, Poland tel.: [phone], fax.: [phone]

autor

Rybak P.

• Military University of Technology Kaliskiego Street 2, 00-908 Warszawa, Poland tel.: [phone], fax.: [phone]

autor

Wysocki Z.

• Military University of Technology Kaliskiego Street 2, 00-908 Warszawa, Poland tel.: [phone], fax.: [phone]

Bibliografia

• [1] Cheng, D., Hung, C., Pi, S., Numerical Simulation of Near-Field Explosion, Journal of Applied Science and Engineering, Vol. 16, No. 1, pp. 61-67, 2013.
• [2] Hallquist, J., O., LS-DYNA Keyword User's Manual.VolumeI. Version 971 R6.0.0, Livemore Software Technology Corporation, Livermore 2012.
• [3] Maranda, A., Koślik, P., Hadzik, J., Wilk, Z., Research of ANFO cylindrical explosive charge detonation in air using modern numerical modeling methods, Chemik, No. 1, 68, pp. 13-16, 2014.
• [4] Mespoulet, J., Plassard, F., Hereil, P., Lefrançois, A., Influence of HE shape on blast profile, 8th European LS-DYNA Users Conference, Strasbourg 2011.
• [5] Slavik, T. P., A Coupling of Empirical Explosive Blast Loads to ALE Air Domains in LSDYNA, Livermore Software Technology Corporation Livermore, California, U.S.A.
• [6] Simoens, B., Lefebvre, M., Minami, F., Influence of Different Parameters on the TNTEquivalent of an Explosion, Central European Journal of Energetic Materials, 8(1), pp. 53-67, 2011.