LONGITUDINAL-TRANSVERSE VIBRATIONS OF A RESILIENT SYSTEM IN THE DISCHARGE CAR OF DISTRIBUTING CONVEYOR

Details

Parent Category: Geo-Technical Mechanics, 2013

Category: Geo-Technical Mechanics, 2013, Issue 109

UDC 622.647:622.867

Authors:

V.F. Monastyrsky, D.Sc. (Tech.), Professor,

R.V. Kiriya, Ph.D. (Tech.), Senior Researcher,

D.A. Nomerovsky, Doctoral Student,

S.R. Vanin, M.S (Tech.)

(IGTM NAS of Ukraine)

Abstract.

This article presents results of researches of transversal-longitudinal vibrations of a resilient system “belt - resilient foundation” in the charging section of distributing conveyer when the belt is charged by evenly-distributed weights or lumps (external impact) with constant or variable masses and time periods of the impact. Problems of simulating of external impact by stream of bulk weights, rigidity of the resilient system in the charging section and calculation of the system statics under distributed and point loads are considered. Mechanism of the system rigidity changing is described depending on the belt tautness and span of the roll supports placing. A calculation model is presented for specifying the system transversal-longitudinal vibrations under external impact including a system of equations with initial and boundary conditions, which were solved with the help of the Runge-Kutta method of the fourth order and the Maple software package. The findings were analyzed and generalized.

It is stated that longitudinal vibrations reduce the transversal vibrations. High-frequency disturbing force does not cause perceptible vibrations in the low-frequency resilient system as the system too slowly responds to the very quick changes of the force. At the random charging of the system, vibration amplitude reaches 0,1-0,14 m, and, actually, the system vibrates at the same way as it vibrates when the disturbing force changes by the harmonic law. At low frequencies, the system is almost in resonance. However, the vibration amplitude features limited size due to the action of considerable dissipative forces in the resilient system.

Keywords:

lumps, period, mass, low frequency resilient system, vibrations, dissipative forces, amplitude-frequency response.

References:

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About the authors:

MonastyrskyVitaly Fedorovich, Doctor of Technical Sciences (D. Sc), Professor, Senior Researcher in Department of Mining Transport Physics and Mechanics, M. S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kiriya Ruslan Vissarionovich, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mining Transport Physics and Mechanics, M. S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Nomerovsky Denis Anatolyevich, Doctoral Student in Department of Mining Transport Physics and Mechanics, M. S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Vanin Stanislav Romanovich, Master of Science, Engineer in Department of Mining Transport Physics and Mechanics, M. S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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