1. Lviv Polytechnic National University , Institute of Engineering Mechanics and Transport , Department of Mechanics and Automation of Mechanical Engineering , Lviv , 79013 , Ukraine
2. Lviv Polytechnic National University , Institute of Civil Engineering and Building Systems , Department of Strength of Materials and Structural Mechanics , Lviv , 79013 , Ukraine
3. Lviv National Agrarian University , Faculty of Mechanic and Power Engineering, Department of Project Management and Occupational Safety , Lviv-Dubliany , 80381 , Ukraine