Present problems of vibration isolation in heavy mining machines at long-term cyclic loads

¹ Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 49005, Dnipro, Simferopolska Str., 2a, Ukraine
² Dnipro State Agrarian and Economic University, 49600, Dnipro, Serhiia Yefremova Str., 25, Ukraine
³ Prydniprovsky Scientific Center of National Academy of Sciences of Ukraine and of Ministry of Education and Science of Ukraine, 49600, Dnipro, Leshko-Popelia Str., 15, Ukraine
⁴ State Agrarian and Engineering University in Podilya, 32300, Kamianets-Podilskyi, Khmelnytskyi region, Schevchenko Str., 13, Ukraine
⁵ Kazakh Research and Design Institute of Construction and Architecture, 050036, Almaty, 3rd microdistrict, 45/1, Kazakhstan

^* Corresponding author: vita.igtm@gmail.com

Abstract

On the basis of the developed simulation model and the Boltzmann-Volterra integral relations with kernels of relaxation and aftereffect, an equation was worked out, which made it possible to take into account the rubber viscoelastic properties in full volume; in this equation, stiffness operator of elastic suspension in the machine is written by using fractional exponential function of the Yu. Rabotnov’s type; on the basis of the mathematical model, the basic parameters of the machine under the study were calculated; in particular, for the vortex mixer, the time dependences of amplitude of the mixer housing vibrations and coefficient of vibration isolation efficiency were calculated with taking into account aging of elastic link material in the machines; the calculation results were compared with the results of industrial tests of the vortex mixer operation lasting for 16 years. The theory and method for calculating vibration isolation systems with rubber elastic links for heavy mining machines were developed with taking into account material structure changes due to the effects of aging.