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http://dx.doi.org/10.5139/JKSAS.2005.33.7.033

A Study on Model Establishment and Structural Analysis for Gun Blast Load  

Kim, Dae-Kwan (한국과학기술원 항공우주공학과)
Han, Jae-Hung (한국과학기술원 항공우주공학과)
Jang, Jae-Ho (한국항공우주산업)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.7, 2005 , pp. 33-39 More about this Journal
Abstract
A mathematical model, GUNBLAST, of blast waves emitted from a gun muzzle is established, and structural response analyses for the blast load are performed. The blast wave can be divided into two kinds of waves, free field and reflected blast waves. In this research, the free field blast wave model is established by the use of a scaling approach, and the reflected blast wave is calculated by using the oblique shock theory and computational fluid dynamic calculation. GUNBLAST is applied to two kinds of structural models. To investigate the effect of the muzzle distance from a structural surface, the blast waves on a plate for various muzzle distances are compared to uniform loads. Moreover, the transient response analysis of an aircraft wing model with a 12.7mm gun is carried out by using MSC/NASTRAN. From the results, it can be shown that the blast wave can cause broad random vibration and high frequency damage to equipments mounted in the aircraft.
Keywords
Gun Blast Waver; Scaling Approach; Mach Reflection; Transient Response Analysis;
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  • Reference
1 Ishii, R., Fujimoto, H., Hatta, N., and Umeda, Y., 'Experimental and Numerical Analysis of Circular Pulse Jets', Journal of Fluid Mechanics, Vol. 392, 1999, pp. 129-153   DOI
2 Liepmann, H. W, 'Elements of Gasdynamics', J. Wiley, New York, 1957
3 Gunfire Vibration, Aircraft, MIL-STD-810E, 14 July 1989
4 McCarthy, D. K., 'Analysis and Test of Gun Blast Resistant Composite Structure', Boeing Company
5 Moretti, G., 'A Numerical Analysis of Muzzle Blast Precursor Flow', Computers and Fluids, Vol. 10, No. 1, 1982, pp. 51-86   DOI   ScienceOn
6 Turkmen, H. S., 'Structural Response of' Laminated Composite Shells Subjected to Blast loading: Comparison of Experimental and Theoretical Methods', Journal of Sound and Vibration, Vol. 249, No. 4, 2002, pp. 663-678   DOI   ScienceOn
7 Heaps, C. W., Fansler, K. S., and Schmidt, E. M., 'Computer Implementation of a Muzzle Blast Prediction Technique', The Shock and Vibration Bulletin, Bulletin 56, 1986, pp. 213-229
8 Fansler, K. S., 'Dependence of Free-Field Impulse on the Decay Time of Energy Efflux for a Jet Flow', The Shock and Vibration Bulletin, Bulletin 56, 1986, pp. 203-212