Abstract:

A numerical model for simulating the underwater explosion of bottom charge was established using the hydrodynamics analysis software, and the underwater explosion process was numerically simulated to obtain the law of its shock wave propagation. For the underwater explosion of a bottom charge, the shock wave propagation complies with the law of exponential decay. The bottom affected the shock wave propagation. Mach wave was formed due to the reflective wave catching up with the incident wave at the gauge points which were close to the explosion point on the bottom. For the points near the bottom their incident wave was strengthened or weakened by the shock wave or the rarefaction wave reflected from the bottom.

Key words: ordnance science and technology, underwater explosion, shock wave, bottom charge