Experimental study on TNT equivalent coefficients for two new kinds of propellants

GAO Jinming; ZENG Dan; SUN Lei; CHEN Li; HE Chenglong

doi:10.11883/bzycj-2020-0432

Volume 41 Issue 10

Oct. 2021

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GAO Jinming, ZENG Dan, SUN Lei, CHEN Li, HE Chenglong. Experimental study on TNT equivalent coefficients for two new kinds of propellants[J]. Explosion And Shock Waves, 2021, 41(10): 102101. doi: 10.11883/bzycj-2020-0432

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GAO Jinming, ZENG Dan, SUN Lei, CHEN Li, HE Chenglong. Experimental study on TNT equivalent coefficients for two new kinds of propellants[J]. Explosion And Shock Waves, 2021, 41(10): 102101. doi: 10.11883/bzycj-2020-0432

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Experimental study on TNT equivalent coefficients for two new kinds of propellants

doi: 10.11883/bzycj-2020-0432

GAO Jinming^1
,,
ZENG Dan¹,
SUN Lei¹,
CHEN Li^{2
,
,},
HE Chenglong³

1.
China Ordnance Engineering and Safety Technology Research Institute, Beijing 100053, China
2.
Engineering Research Center of Safety and Protection of Explosion and Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China
3.
College of Mechatronics Engineering, North University of China, Taiyuan 030051, Shanxi, China

Received Date: 2020-11-24
Rev Recd Date: 2020-12-28

Available Online: 2021-09-01

Publish Date: 2021-10-13

Abstract

Abstract

The TNT equivalent coefficient is an important evidence to guide the blast-resistant design and safe-distance determination for dangerous goods. To find out the TNT equivalent coefficients of two new kinds of propellants (H1, H2), a series of free-field static detonation tests were performed for the two propellants (H1, H2) and flaky 2,4,6-trinitrotoluene (TNT). Five repeated tests were carried out for each explosive and the mass of the tested explosive was 10 kg in each test. And the existing method for calculating the TNT equivalent coefficients was modified. Base on the overpressure-time curves of the shock waves at different distances from the explosion centers, the TNT equivalent coefficients for overpressure and specific impulse at different scaling distances were analyzed by the modified calculation method. The results show that the propagations of shock waves induced by explosions of the propellants agree well with the similar law, and are similar with that induced by explosion of the TNT explosive. Meanwhile, the overpressures and specific impulses of shock waves induced by explosions of the two propellants are much higher than those of the TNT explosive. With the increase of scaling distance, the overpressure TNT equivalent coefficient of H1 first increases to 1.34 and then decreases, while that of H2 decrease monotonously, and the maximum value is 1.26. With the increase of the scaling distance, both the specific impulse TNT equivalent coefficients of H1 and H2 first increase and then decrease. The specific impulse TNT equivalent coefficient of H1 with the peak value 1.38 is greater than that of H2. The modified method can be used to accurately calculate the TNT equivalent coefficients of the tested samples, and the results can improve the safety design of blast-resistant structures.
- propellant,
- TNT equivalent coefficient,
- overpressure,
- specific impulse,
- static explosive

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References(19)

References

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