1. Institute of Mechanics, Ural Division, Russian Academy of Sciences, Kalashnikov Izhevsk State Technical University, Izhevsk, Russia
2. Kalashnikov Izhevsk State Technical University, Izhevsk, Russia
3. Kalashnikov Izhevsk State Technical University, Izhevsk, Russia *Corresponding author. E-mail: vakhrushev-a@yandex.ru *Corresponding author. E-mail: vakhrushev-a@yandex.ru