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

• Published in: Applied Mechanics and Materials Vol. 713-715; no. Mechatronics Engineering and Modern Information Technologies in Industrial Engineering; pp. 1794 - 1799
• Main Authors: Lu, Xi, Wang, Shu Shan, Ma, Feng, Hao, Yun Peng
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.01.2015
• Subjects: Bulging; Computer simulation; Diffraction; Mathematical models; Peak pressure; Rarefaction; Shock waves; Underwater explosions; Underwater Explosion; Double Explosive Sources; Coupled Pressure
• ISBN: 9783038353799; 3038353795
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.713-715.1794

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.