THE BASIS OF RESONANCE-STRUCTURE THEORY FOR VIBROIMPACT UNLOADING OF THE VEHICLES
DOI:
https://doi.org/10.15802/stp2014/30458Keywords:
oscillations, resonance, unloading, deformation, strainAbstract
Purpose. The use of the main provisions of the resonance-structure theory for theoretical study of basic physical and mechanical processes taking place in unloading material during the vibrimpact discharge in order to substantiate the efficiency of their application. Methodology. Unloading material during vibroimpact unloading, as the study object, appeared as phenomenological model of spatial dispersion medium. The dynamics equations of unsteady forced particle oscillations of the "linked" structure under the action of vibration and impact loadings, taking into account the vibro rheological effect, with the establishment of resonance zones were considered. Findings. When considering the resonance zones of unstable forced oscillations of the "linked" structure particles it was found out that under the influence of vibration loadings the system is effectively affected by the monoharmonic pulse of external forces in the form of sinusoidal wave with an angular frequency. This frequency is equal to the main frequency of the natural oscillations of the unloading material. Under the impact loading it is necessary to affect the system by the accumulation of external force pulses in the form of single instant impulse. Under the given load conditions in these systems the phenomenon of resonance, which provides absolute deformation in handling system of the "linked" structure of the material due to discrete growth in the range of plastic deformations takes place. Absolute deformation, resulting in handling material exceed the permissible elastic deformations for the particles of this system and the destruction of the contact zones of these particles takes place. Originality. The authors studied unstable forced oscillations of the "linked" structure particles based on the phenomenological model of the spatial dispersion medium of unloading material. Thus, for each type of vibro-impact loads were calculated the conditions for resonant processes. That was presented by the relevant type of the actuating force. Practical value. The main provisions of the resonance-structural theory in theoretical study of the vibroimpact load processes prove the use efficiency of the vibroimpact equipment to increase the intensity of the vehicles unloading. The use of resonance-structural theory allows predicting the required parameters of vibro-impact loading on the unloading material, depending on its physical and mechanical properties that ensures the efficient unloading due to the destruction of the power relations of unloading material particles.
References
Babichev A.P., Trunin V.B., Samodumskiy Yu.V. Vibratsionnyye stanki dlya obrabotki detaley [Vibration machines for parts processing]. Moscow, Mashinostroyeniye Publ., 1984. 168 p.
Bauman V.A., Bykhovskiy N.N. Vibratsionnyye mashiny i protsessy v stroitelstve [Vibration machines and processes in construction]. Moscow, Vysshaya shkola Publ., 1977. 255 p.
Chelomey V.N., Bolotin V.V. Vibratsii v tekhnike. T. 1: Kolebaniye lineynykh sistem [Vibrations in engineer-ing, Vol. 1: Oscillations of linear systems]. Moscow, Mashinostroyeniye Publ., 1979. 352 p.
Chelomey V.N., Blekhman I.I. Vibratsii v tekhnike. T. 2: Kolebaniye nelineynykh mekhanicheskikh system [Vibrations in engineering, Vol. 2: Oscillations of non-linear mechanical systems]. Moscow, Mashinostroy-eniye Publ., 1979. 351 p.
Bauman V.A., Bykhovskiy N.I., Goldshteyn B.G. Vibratsionnyye mashiny v stroitelstve i proizvodstve stroitelnykh materialov [Vibrating machines in the construction and production of building materials]. Mos-cow, Mashinostroyeniye Publ., 1970. 548 p.
Volkova V.Ye. Dinamicheskoye povedeniye sistem s nesimmetrichnymi kusochno-lineynymi uprugimi kha-rakteristikami [Dynamic behavior of systems with unsymmetrical piecewise linear elastic characteristics]. Vіsnyk Dnіpropetrovskoho natsіonalnoho unіversytetu zalіznichnoho transportu іmenі akademіka V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2003, issue 1, pp. 137-141.
Volkova V.Ye. Chislennoye modelirovaniye poligarmonicheskikh kolebaniy nelineynykh dinamicheskikh sistem [Numerical simulation of polyharmonic fluctuations of non-linear dynamical systems]. Vіsnyk Dnіpropetrovskoho natsіonalnoho unіversytetu zalіznichnoho transportu іmenі akademіka V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2004, issue 3, pp. 115-120.
Goncharevich I.F., Frolov K.V. Teoriya vibratsionnoy tekhniki i tekhnologi [The theory of vibrating equip-ment and technology]. Moscow, Nauka Publ., 1981. 365 p.
Iskovich-Lototskiy R.D., Matveyev I.B. Vibratsionnyye protsessy [Vibration processes]. Moscow, NIIMash Publ., 1979. 50 p.
Iskovych-Lototskyi R.D., Ivanchuk Ya.V. Vibratsiini ta vibroudarni prystroi dlia rozvantazhennia transportnykh zasobiv [Vibration and vibvroimpact devices for unloading of the vehicles]. Vinnytsia, VNTU Publ., 2012. 156 p.
Iskovych-Lototskyi R.D. Osnovy teorii rozrakhunku ta rozrobka protsesiv i obladnannia dlia vibroudarnoho presuvannia [Fundamentals of the theory for calculation and development of processes and equipment for vibro-pressing]. Vinnytsia, Universum Publ., 2006. 3308 p.
Glushak B.L., Novikov S.A., Ruzanov A.I. Sadyrin A.I. Razrusheniye deformiruyemykh sred pri impulsnykh nagruzkakh [The destruction of deformable media under pulse loading]. Nizhniy Novgorod, Nizhegorodskiy universitet Publ., 1992. 192 p.
Cheli F. On rail vehicle vibrations induced by track unevenness: Analysis of the excitation mechanism. Journal of Sound and Vibration, 2011, vol. 330, issue 15, pp. 3744-3765. doi: 10.1016/j.jsv.2011.02.025.
Nejez J. Cableway oscillation problems. Intern. Ropeway Review, 2011, no. 6, pp. 47.
Thelisson G. Overhead line from start to finish. Railway Gazette Intern., 2012, July, pp. 48-49.
Downloads
Published
How to Cite
Issue
Section
License
Copyright and Licensing
This journal provides open access to all of its content.
As such, copyright for articles published in this journal is retained by the authors, under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0). The CC BY license permits commercial and non-commercial reuse. Such access is associated with increased readership and increased citation of an author's work. For more information on this approach, see the Public Knowledge Project, the Directory of Open Access Journals, or the Budapest Open Access Initiative.
The CC BY 4.0 license allows users to copy, distribute and adapt the work in any way, provided that they properly point to the author. Therefore, the editorial board of the journal does not prevent from placing published materials in third-party repositories. In order to protect manuscripts from misappropriation by unscrupulous authors, reference should be made to the original version of the work.