DESIGN OF BOOM LIFTING DEVICE OF MINIMUM WEIGHT 

Kravchenko Pavel Davidovich, Doctor of engineering sciences, professor, vice president for research, Volgodonskiy Service Institute (branch) South-Russian State University of Economics and Service (16 Mira avenue, Volgodonsk, Rostov region, Russia), krapa21@yandex.ru
Dudchenko Anatoliy Nikolaevich, Candidate of engineering sciences, associate professor, sub-department of mechanical engineering and applied mechanics, Volgodonskiy Institute (branch) National Research Nuclear University "MIFI" (73/94 Lenin street, Volgodonsk, Rostov region, Russia), krapa21@yandex.ru 

624.04 

Background. Work on the demolition of the destroyed buildings in emergency situations require primarily minimization of time for delivery and installation of material handling equipment. These costs depend on the number and weight of the finite element assembled in mobile lift - transport device manually. The aim of this work is to determine the valid data for the design of the boom lifting device with the minimum mass of each of the assembled items under the terms of reliability and safety operation.
Materials and methods. Structurally-power scheme of lifting device is an assembly of individual elements of the weight of any of them no more than 150 kgs to provide conditions for the assembly by hand in case of emergency. Based on the basic formulas for the calculation of the strength of the elements of the boom, working in bending and compression such optimization methods as thin-walled cross sections - successive approximations using Yasinskiy simplifying approximations and design rules according to the regulations for the design of building constructions were used.
Results. The optimal geometry of the cross-section boom length of 18m in the form of a rectangular box-section of the rod, tested the strength condition in the plane of the bending moment was calculated. The possibility of using structural steel instead of expensive alloy and possible ways to further optimization of the design process was represented.
Conclusions. The results obtained are valid for use in the process of constructing prefabricated boom lifting device. 

optimization, boom, crane, bending, compression. 

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