Numerical Simulation on Pressure Field Characteristics of Underwater Explosion with Double Explosive Sources

Abstract:

By using the AUTODYN, the study of numerical simulation on pressure field characteristics of underwater explosion detonated by the double explosive sources at the same time shows that a coupled zone with increased pressure appears after the two initial shock waves transmit through each other and at the intersection of the two initial shock waves, the mach wave appears. The transmitted waves diffract around bubbles with a reflected rarefaction wave. The peak pressure in the central area between the two explosive sources is caused by transmitted wave and has dishing isosurface. And the peak pressure outside the two explosive sources is caused by initial shock wave and has spherical isosurface. Coupled peak pressure in the plane of symmetry is two times more than incident peak pressure and with the propagation of shock wave, the ratio of coupled peak pressure and incident peak pressure gradually increases.

• Periodical: Applied Mechanics and Materials (Volumes 713-715)
• Pages: 1794-1799
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.713-715.1794
• Online since: January 2015
• Authors: Xi Lu*, Shu Shan Wang, Feng Ma, Yun Peng Hao
• Keywords: Coupled Pressure, Double Explosive Sources, Underwater Explosion

References

[1] R. H. Cole, Underwater Explosion. Princeton University Press, New Jersey: (1948).

[2] Wu Guo-qun, Zhang Ming-xiao, Gong Qi-xiang, Wang Chen. Study on the Interaction of the Shock Waves in Underwater Explosion[J]. Coal Mine Blasting. 2011, (2): 12-15.

[3] Zamyshlyayev B V. Dynamic Loading in Underwater Explosion[R]. AD-757183, (1973).