IMPROVING AN INTEGRATED APPROACH BASED ON ANALOG VISUALIZATION TOOLS IN STUDYING HIGH-SPEED PENETRATION INTO ICE

Abstract

An analog optical-radiographic complex is presented, consisting of portable pulsed X-ray equipment and an electron-optical camera, designed to study the processes of penetration of high-speed strikers thrown by ballistic installations into solid media. The use of the complex when conducting experiments on the penetration of impactors into salt and fresh ice with an average speed of 1000 m/s is described. To produce the salted ice barrier (SIP) used in the experiments, tap water was used, frozen in a climate chamber in a specially designed container and sea salt pre-dissolved in hot water at the rate of 190–210 grams per volume of water (~23 liters) used for receiving SIP. The impactor was introduced normal to the front surface of the target, and the length of the measuring section was the same in all experiments. Based on the experimental response times of the sensors in the ice obstacle, the dynamic hardness and hydrodynamic drag coefficient were determined using the least squares method in relation to the Poncelet-shaped motion pattern. The dimensions of the cavity formed in the ice were determined by measuring (taking into account a magnification factor of 1.28–1.32) the cavity recorded on the X-ray image. The cavity radius was defined as half the cavity diameter at a fixed distance. It was revealed that the dimensions of the resulting cavity in fresh and salt ice under the implementation conditions implemented in the experiments, practically, taking into account the measurement error, do not depend on temperature; in salt ice, the cavity is, on average, 20% wider than in fresh ice.