MODERN LEVEL AND FUTURE TRENDS OF METRO RAILWAY CONSTRUCTIONS

Bochkaryov D.I., Candidate of Technical Sciences, Dean of the Civil Engineering Faculty, Associate Professor of the Department "Machine parts, travel and construction machinery", Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Kebikov A.A., Candidate of Technical Sciences, Associate Professor of the Department "Construction and Operation of Roads", Belarusian State University of Transport, Gomel, Republic of Belarus

Miroschnikov N.E., Assistant of the Department "Construction and Operation of Roads", Belarusian State University of Transport, Gomel, Republic of Belarus

Polyschuk V.P., Chief Engineer, OAO "Minskmetroproekt", Republic of Belarus

Kazak P.M., PTE Leading Engineer, OAO "Minskmetroproekt", Republic of Belarus

During more than half of century period of use the typical construction of upper building metro railway with wood ties and strengthening "Metro" a number of disadvantages has been discovered. The main of them were heightened level of noise and vibration, traction current leakage, low repairability, higher costs at current keeping etc. Because of exceeding the sanitary regulations noise and vibration level in buildings, border upon metro railway lines shallow foundation, enhancement of railway construction in today mainly direct to solve this problem. In article has been viewed main constructions of upper building and strengthening of metro railway, analysed particular qualities of their exploitation and suggested technical decisions on development a new construction with heightened protection against vibration properties.

noise and vibrations, standard design of a way, vibration properties, sleeperless track

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• Kravchenko N.D. [et al.]. Osobennosti puti s zhelezobetonnymi ramnymi shpalami [Features of the way with concrete sleepers by web]. Put i putevoe hozjajstvo [Road and track facilities], 2009, no. 7, pp. 9-11.
• Ermakov V.M. Skreplenija dlja zhelezobetonnyh shpal: trebovanija, obosnovanija i ocenka [Bonds to concrete sleepers: requirements, study and evaluation]. Put i putevoe hozjajstvo [Road and track facilities], 2009, no. 2, pp. 9-16.
• Naumov B.V. O vybore tipa verhnego stroenija puti metropolitena: cifry i fakty [On the choice of the type of track superstructure of metro: facts and figures]. Put i putevoe hozjajstvo [Road and track facilities], 2010, no. 7, pp. 30-34.

PHYSICAL AND CHEMICAL ANALYSIS, MULTIFRACTAL AND WAVELET ANALYSIS OF STRUCTURE AND FRICTION SURFACE RELIEF

Vityaz P.A., Academician of the NAS of Belarus, Doctor of Technical Sciences, Professor, Head of the National Academy of Sciences of Belarus, Head of the Department of Technology of Mechanical Engineering and Metallurgy of the Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus
Ilyuschenko A.F., Corresponding Member of the NAS of Belarus, Doctor of Technical Sciences, Professor, General Director of SSPD Powder Metallurgy of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
Kheifetz M.L., Doctor of Technical Science, Professor, Deputy Academician-Secretary of the Department of Physics and Technical Sciences of the NAS of Belarus, Minsk, Republic of Belarus
Solntsev K.A., Academician of the RAS, Doctor of Chemistry, Professor, Deputy President of the RAS - Managing Director of the RAS, Director of the Institute of Metallurgy and Materials Science n.a. A.A. Baikov of the RAS, Moscow, Russia
Barinov S.M., Corresponding Member of the RAS, Doctor of Technical Sciences, Deputy Director for Sciences of the Institute of Metallurgy and Materials Science n.a. A.A. Baikov of the RAS, Moscow, Russia
Kolmakov A.G., Doctor of Technical Sciences, Professor, Deputy Director for Scientific Work of the Institute of Metallurgy and Materials Science n.a. A.A. Baikov of the RAS, Moscow, Russia

Using system approaches provides essential development of traditional methods in materiology and their effective application for objects with difficult multiscale structure and for nano-structural materials as well. It shows application of complex physical and chemical analysis, multifractal and wavelet analysis to describe material structures in qualitative and quantitative way, which allows revealing the differences poorly distinguished with other separate methods and estimating system characteristics of material structures and characterizing the process in self-organizing in structures. Formation by tearing of friction surface structures for composite materials with additives of Al₂O₃ and SiC is described in comparable thermodynamic conditions. Adding SiC in comparison with Al₂O₃ promotes to a lesser extent fragmentation and increase in frequency of setting and breaking processes. Adding graphite to reinforced SiC composite material results in increase in nonequilibrium of thermodynamic condition of structure formation. Additional introduction of graphite in even greater degree strengthens distinctions between materials with SiC and Al₂O₃ additives, which results in formation of the least ordered structures of friction surface.

nanostructured materials, aluminum alloys, wavelet analysis, composite materials, surface topography

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EFFECTIVENESS INCREASE OF CARGO HANDLING OPERATIONS OF MULTILINK TRUCKS

Ablameiko M.N., Senior Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
Andreichik A.F., Senior Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus
Korotky V.S., Senior Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus
Kochetov S.I., Head of the Department of Modular Multi-Link Vehicles, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus
Susha S.A., Senior Researcher, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus

The paper discusses issue and limitations of cargo handling operations of multilink trucks at logistic centers. Suggestions for effectiveness increase of cargo handling operations of multilink trucks are offered.

multilink truck, load, cargo, handling operations

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STRESS-STRAIN STATE AND DAMAGE OF TRIBO-FATIGUE SYSTEM CLAMP-KNIFE-BASE OF HARVESTER CUTTING INSTRUMENT

Scherbakov S.S., Candidate of Physical and Mathematical Sciences, Associate Professor of the Department "Theoretical and Applied Mechanics", Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Multicomponent clamp-knife-base system of cutting instrument of a harvester is considered. Stress-strain and damage states of the system are calculated in two-dimensional statement. Both the cutting force and contact interaction between the elements of the system were taken into account. Significant influence of knife’s material on its damage and influence of cutting force on contact tractions distribution are shown.

stress-strain state, multi-component system, cutting drum, contact forces

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