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8327459 
Journal Article 
An Evaluation Method of Internal Blast Power in a Perforated Cylinder Device 
Li, SQ; Li, ZR; Zhang, YL; Zhai, HB 
2020 
43 
3 
341-344 and 350 
Chinese 
To evaluate the internal blast power more scientifically, the internal blast experiments and power evaluation of five kinds of bare explosive grain (TNT, pressed and cast aluminized explosives) were carried out using a closed cylinder device with a prefabricated strip hole at one end. The impulse, quasi-static pressure, thin plate central point deflection and strip hole crack length were selected as indicators to characterize the air explosion performance, implosion performance and thin plate deformation energy. Then an evaluation method of internal blast power based on the perforated cylinder device was proposed and applied to the five explosives by assigning different weights to the indicators and the results were compared and analyzed. The results show that the blast power of formula 4 and TNT are more excellent when considering only peak overpressure, impulse and quasi-static pressure, which is difficult to reflect the structural deformation energy and characteristics of excellent internal blast power of aluminized explosive. According to the method of this study, the value of quasi-static pressure and thin plate deformation of formula 5 are greater, therefore the internal blast power ranks first. Conversely, TNT ranks the last one. The method can comprehensively and objectively evaluate the internal blast power, and can be used to evaluate the internal blast power of the warhead in limited space and select the charge type. © 2020, Editorial Board of Journal of Explosives & Propellants. All right reserved. 
Confined device; Explosion mechanics; Internal blast; Power evaluation; Prefabricated strip hole