Analysis of meso-mechanism of ice damage under two loads of underwater explosion

Abstract

Subglacial explosion is mainly used for ice breaking operation, and it is widely used in daily production and life, military, scientific research and other fields. When using numerical analysis software to deal with the ice breaking problem of nearfield underwater explosion, this paper takes the damage of shock wave load and bubble jet load to the ice layer as the research object. Aiming at the meso damage of ice layer under near-field underwater explosion, a numerical model of shock wave ice layer and bubble ice layer coupling effect is established based on one-dimensional stress wave propagation theory, The meso evolution process of ice damage under near-field underwater explosion is analyzed. Compared with the empirical formula and numerical calculation results, the law and mechanism of ice damage and crack propagation under near-field underwater explosions are obtained.