ABSTRACT
In this paper, ANSYS/LS-DYNA is used as the technical means to construct a two-dimensional model of explosive explosion in air, and the influence of two kinds of circular holes and two kinds of specialshaped holes on explosion-proof performance of the blast wall is compared and analyzed, the results show that: the peak reflection pressure in front of the blast wall with YX1 pressure relief hole is the largest, while the overpressure behand the wall is the smallest, and compared with YX2 pressure relief holes, the weakening effect of the former is stronger than the latter on the peak reflected pressure in front of the blast wall, while the effect on the overpressure behind the wall is just the opposite; the setting of special shaped relief holes will reduce the positive pressure on the blast facing surface of the blast wall, but greatly increase the negative pressure strength, and especially the wall with YX2 pressure relief hole is the most obvious; on the whole, the total energy and energy density of all kinds of blast walls increased first and then decreased with the increase of time, the energy and energy density on the blast facing surface of blast wall with the YX2 pressure relief hole increase to the largest extent.
