Samusya S. Mobile emergency hoists rational operation modes and paramters feasibility

The object of study - the dynamic processes within the cable system, a mobile hoist in the breaking modes. The purpose of the work - to ensure efficient and safe use of emergency mobile lift systems through the rational justification of the parameters and modes of operation, taking into account the mutual influence of dynamic processes in a string and a plumb line. Methods of investigation - a comprehensive method for theoretical studies of the dynamics of mobile elevating installation based on the solution of the equations of theoretical mechanics and mathematical physics, and experimental studies on the existing lifting complexes using standard measuring and recording equipment. Mathematical model of the hoist braking process as a single mechanical system including a sloping sagging string and plumb with the vessel has been developed. It allows studying dynamic processes in the rope system and the kinematics of the hoist. Zones of parametric instability in mutual vibrations of a string and plumb have been established, their presence is explained by the appearance of parametric resonance between vibrations of the string and plumb of the hoist rope.Developed “Method of determining rational operational parameters mobile rescue hoist equipment” is used by LTD “SRI of mining mechanics by M.M. Fedorov” and rescue service of Ukraine. Using the results of the work gives the social impact by improving the efficiency and safe operation of mobile lifting equipment for rescue and remedial work.