RESULTS OF AN EXPERIMENTAL STUDY OF IMPACT ON ICE, FROZEN ON POWER LINES 

Ratushnyak Valentina Sergeevna, postgraduate student, Irkutsk State Transport University (2i Novaya zarya street, Krasnoyarsk, Russia), E-mail: ratushnyak_vas@krsk.irgups.ru 

531.663 

10.21685/2307-5538-2020-1-8 

Background. When solving the problem of freeing power lines from icing by mechanical shaking, the phenomenon of ice brittleness at high loading speeds can be used. The object of study is an ice tube frozen on a power line wire. The aim of this work is to identify the dependence of the energy required for ice destruction on the speed of impact and to verify the assumption that with an increase in the speed of the dynamic effect on ice destruction, less energy is required.
Materials and methods. The study was performed using the developed laboratory setup. The blows on the chipper fixed directly to the wire before the icing began were carried out using a pendulum 2 m long with a removable mass of cargo.
Results. A criterion is formulated that makes it possible to uniquely determine the parameters of the impact necessary for the destruction of ice. The dependences of the stored and transferred energy on the velocity of the striking body are given, taking into account that the shock is not completely elastic.
Conclusions. The assumption of a decrease in the energy required for the formation of cracks and shaking off of ice with an increase in the speed of dynamic action along the chipper fixed directly to the wire is confirmed. 

icing of power line wires, brittle destruction of ice, energy for ice destruction, destruction criterion, partially elastic impact