Natural Frequencies of Small Cylinders and Tubes

• Autorzy: Lisy P. , Perun P.

Identyfikatory

DOI

10.5604/20815891.1157770

• Języki publikacji: EN

Abstrakty

EN

The paper deals with modal analysis of the cylinders and tubes and their mutual comparison. Nowadays, modal analysis is a powerful method of describing the vibration properties. When we know own shapes and natural frequencies, we can predict e.g. behaviour of tubes under loading conditions. The tubes dimensions were taken as dimensions which are close to assault rifle barrels. The same dimensions were taken for cylinders. The cylinders and tubes as 3D objects were modelled and their lengths and thicknesses were modified. Modal analysis was performed by LS-DYNA software using FEM with iterative Lanczos method. In Tables 1-12, the natural frequencies for these cantilever beams and their corresponding own shapes with modification in fixing length for three different thicknesses are listed. In Figure 2 and 7-9, these natural frequencies versus modification in fixing length for three different thicknesses for corresponding modes are shown. In Figure 3-5 and 10-12, natural frequencies versus length of cylinders and tubes for three different thicknesses for corresponding modes are shown.

Słowa kluczowe

EN

mechanics; modal analysis; cylinder; tube; small weapon barrel

• Wydawca: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
• Rocznik: 2015
• Tom: Vol. 6, Nr 2 (20)
• Strony: 7--20
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Lisy P.

• Department of Mechanical Engineering Academy of the Armed Forces Gen. M.R. Štefánik, Demänová 393, 031 06 Liptovský Mikuláš 6, Slovak Republik

autor

Perun P.

• Department of Mechanical Engineering Academy of the Armed Forces Gen. M.R. Štefánik, Demänová 393, 031 06 Liptovský Mikuláš 6, Slovak Republik

Bibliografia

• [1] Lisý P., Štiavnický M., Modal analysis of barrels for assault rifles, Problems of Mechatronics. Armament, Aviation, Safety Engineering, Warsaw, Military University of Technology, vol. 3, no. 2(8), pp. 7-16, 2012.
• [2] Deng S., Sun H. K., Chung-Jung Chiu, Rifles in – bore finite element transient analysis, Proceedings of the International Conference on Mechanical, Production and Materials Engineering (ICMPME 2012), June 16-17, 2012, Bangkok, pp. 58-62, 2012.
• [3] Vítek R., Influence of the small arm barrel bore length on the angle of jump dispersion, Proceedings of the 7th WSEAS International Conference on System Science and Simulation in Engineering – ICOSSSE ’08, Wisconsin, pp. 114-118, 2008.
• [4] Lisý P., Štiavnický M., Weapon barrel and its additional accessories, Proceedings of the 9th International Armament Conference on Scientific Aspects of Armament & Safety Technology, Pułtusk, Poland, September 25-28, 2012, pp. 485-497, 2012.
• [5] Jedlicka L., Beer S., Videnka M., Modelling of pressure gradient in the space behind the projectile, Proceedings of the 7th WSEAS International Conference on System Science and Simulation in Engineering-ICOSSSE ’08, Wisconsin, pp. 100-104, 2008.
• [6] Varmint A., Barrel Tuner Vibration Analysis, 2012 http://www.varmital.com/amode.htm.
• [7] Bathe K.J., Finite Element Procedures, Pretince-Hall, Inc. 1996.
• [8] LS – DYNA Keyword User´s Manual, Version 971, Livermore Software Technology Corporation, May 2007.