explosion of a condensed explosive charge, destruction of a beam on supports in water, shock wave, reflection, immersion depth, compressibility of water.

The conditions of guaranteed destruction of the beam in water by the explosion of a condensed explosive charge are found. Guaranteed destruction of a beam is understood as a violation of its bearing capacity due to the appearance of cracks, chips in it, leading to unacceptable maximum deflections, its separation into fragments, jumping off supports with further fluctuations. The effects of compressibility of water are taken into account; its effect on the movement of the beam under the action of the pulse load of the explosion is taken into account by the introduction of the attached mass, the depth of immersion of the beam and the charge from the surface of the reservoir, the location of the charge relative to the beam, the effects of shock wave reflection from the surface of the beam, geometric and physical characteristics of the explosive charge are taken into account.

Volodin Gennady Timofeevich, Doctor of Technical Sciences, Professor, Tula State University, Tula, Russia.

Kochergin Denis Sergeevich, postgraduate student, Tula State University, Tula, Russia.