INCREASE OF BRAKING EFFICIENCY OF LOCAL ELECTRIC TRAINS

Senko V.I., D.Sc. in Eng., the Belarusian State University of Transport, Gomel

Galay Ed.I., D.Sc. in Eng., the Belarusian State University of Transport, Gomel

Rudov P.K., Ph.D. in Eng., the Belarusian State University of Transport, Gomel

It was developed a braking system for electric trains equipped with cast iron braking shoes, which allows shortening braking distance at emergency braking. Braking efficiency Increase is provided at the expense of braking force regulation depending on train speed according to calculated force of wheels with rails cohesion change. Analytical dependencies set as the basic of suggested braking model are given. It was made an analysis of ways of change of braking shoes pressing force at speed change. It is given the description of the working principle and operation of braking pressing rapid regulation. The offered braking system is being introduced at motor-carriage depot Minsk. Decrease of braking distance at emergency braking is 15-25 %.

• Galay E.I. Sposob regulirovanija sily nazhatija tormoza zheleznodorozhnogo transportnogo sredstva [Control method of press force regulation of railway vehicle brakes]. Patent RB, no. 107, MPI7 В 60Т 8/82, 1993.
• Galay E.I., Rudov P.K. Tormoznaja sistema zheleznodorozhnogo transportnogo sredstva [The brake system of a rail vehicle]. Patent RB, no. 4989, MPK7 В 60Т 8/58, 13/36, 2003.
• Senko V.I. Sovershenstvovanie organizacii tehnicheskogo obsluzhivanija i tekushhego remonta vagonov na poligone zheleznoj dorogi [Improving the organization of maintenance and repair of cars at the site of the railway].
• Gomel, BelIIZhT, 1986. 46 p.
• Galay E.I. [et al.] Tormoznye kolodki dlja jelektropoezdov: chugunnye ili kompozicionnye [Brake pads for electric trains: cast iron or composite]. Lokomotiv [Locomotive], 2005, no. 6, pp. 34-35.
• Galay E.I. Povyshenie jeffektivnosti jelektropnevmaticheskih tormozov poezda [Improving the efficiency of electro-pneumatic brakes of the train]. Gomel, BelGUT, 2002. 182 p.
• Galay E.I. [et al.] Jeffektivnyj tormoz dlja jelektropoezdov [Efficient brakes for trains]. Lokomotiv [Locomotive], 2005, no. 4, pp. 22-26.

STRUCTURAL DYNAMICS: KEY TRENDS

Algin V.B., D. Sc. in eng., the Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republik of Belarus

Research guidelines in structure dynamics are examined. The key materials of 7th European Conference on structural dynamics (EURODYN 2008) are used.

• Available at: http://www.isvr.soton.ac.uk/eurodyn2008/index.htm.
• Algin V., Ivanov V., Brennan Michael J. Application of Regular Rotational and Translational Constructs to Vehicle Dynamics Problems. Proc.the 7th European Conference on Structural Dynamics. Institute of Sound and Vibration Research; University of Southampton, 2008. 39 p.
• Bathe K-J., Brennan Michael J. On Finite Element Methods for Nonlinear Dynamic Response. Proc. the 7th European Conference
• on Structural Dynamics. Institute of Sound and Vibration Research; University of Southampton, 2008. 2 p.
• Papadrakakis M., Lagaros N.D., Garavelas A.T., Brennan Michael J. Computational Challenges in Seismic Design of Structures. Proc. the 7th European Conference on Structural Dynamics. Institute of Sound and Vibration Research, University of Southampton, 2008. 32 p.
• Mace B.R., Brennan Michael J. Waves and Finite Elements. Proc. the 7th European Conference on Structural Dynamics. Institute of Sound and Vibration Research, University of Southampton, 2008. 62 p.
• Kasperski M., Brennan Michael J. Safety and Serviceability of Stand Structures. Proc. 7th European Conference on Structural Dynamics. Institute of Sound and Vibration Research, University of Southampton, 2008. 62 p.
• Aubry D., B. Tie, Michael J. Brennan Wave Propagation through Honeycomb Shells: Theoretical and Numerical Aspects. Proc. the 7th European Conference on Structural Dynamics. Institute of Sound and Vibration Research, University of Southampton, 2008. 2 p.
• Wang K.W., Brennan Michael J. Research Highlights in Multi-Field Tailoring of Adaptive Structural Systems.Proc. of the 7th European Conference on Structural Dynamics, Institute of Sound and Vibration Research; University of Southampton, 2008. 32 p.
• De Roeck G., Reynders E., Degrauwe D., Brennan Michael J. Variance of Extracted Modal Parameters and Subsequent Damage Identification. Proc. of the 7th European Conference on Structural Dynamics. Institute of Sound and Vibration Research, University of Southampton, 2008. 32 p.
• Takewaki I., Brennan Michael J. Critical Excitation Methods for Important Structures. Proc. the 7th European Conference on Structural Dynamics, Institute of Sound and Vibration Research; University of Southampton, 2008. 2 p.
• Langley R.S., Brennan Michael J. Recent Advances and Remaining Challenges in the Statistical Energy Analysis of Dynamic Systems. Proc. the 7th European Conference on Structural Dynamics. Institute of Sound and Vibration Research, University of Southampton, 2008. 62 p.
• Algin V. B., Hyoung-Eui Kim Reliability and Lifetime of Mechanical Units in Operation and Test. Key Engineering Materials Vols, 2006, pp. 326-328. Available at: http://www.scientific.net/0_87849_415_4/13.html.
• Algin V.B. [et al.] Kinematicheskij i dinamicheskij raschet transmissionnyh sistem na osnove reguljarnyh strukturnyh komponentov [Kinematic and dynamic analysis of transmission systems based on regular structural components]. Teoretich. i prikladnaja mehanika [Teoretical and applied mechanics], 2006, vol. 21, pp. 67-77.
• Vysotskiy M.S., Algin V.B. Raschety kinematiki, dinamiki i resursa mnogomassovyh sistem mobil'nyh mashin: osnovnye napravlenija i perspektivy razvitija [Calculations of kinematics, dynamics and resource multibody systems of mobile machines: the basic directions and prospects of development]. Mehanika mashin, mehanizmov i materialov [Mechanics of machines, mechanisms and materials], 2008, no. 1, pp. 17-23.
• Wang K.W. Multi-Field Tailoring for Structural Monitoring and Control Enhancement. Structural Dynamics and Controls Lab University Park, PA 16802. USA. Available at: http://kirkof.psu.edu/Maiori/Wang%20Presentation.pdf.
• News Briefs MSC.Software # 10 / 2008. Available at: http://www.mscsoftware.ru/index.php?d=press&p=n20080902.
• Na puti k umnym kompozitam: interv'ju s chl.-korr. [On the way to smart composites: an interview with corr. Yu.M. Plekachevskim]. Nauka i innovacii [Science and Innovation], 2008, no. 6(88), pp. 6-7.
• Overview of smart-structures technology at the German Aerospace Center. Available at: www.dlr.de/fa/Portaldata/17/Resources/dokumente/publikationen/2005/16_monner.pdf.

PECULIARITY OF INTERACTIONS IN “MAN-MACHINE-ENVIRONMENT” SYSTEM

Manshin G.G., the Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republik of Belarus

Pyshkin A.B., the Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republik of Belarus

Modern design and analysis of man-machine systems provides decrease of risk of emergency situations while working with technical means. In the article the problem of modelling of interaction between components of "man-machine-environment" system is being observed within multiple-theoretic approach.

• Manshin G.G., Pyshkin A.B., Asanovich V.Ya. Jergatika: Nekotorye problemy modelirovanija slozhnyh cheloveko-mashinnyh sistem [Ergatics: Some problems of complex man-machine systems modeling]. Minsk, Amalhteia, 2008. 206 p.
• Akimov V.A., Faleev M.I. [et al.] Nadezhnost' tehnicheskih sistem i tehnogennyj risk: ucheb. posobie dlja vuzov [Reliability of technical systems and technological risks: college textbook]. Moscow, Business Express, 2002.
• Ryabinin I.A. Nadezhnost' i bezopasnost' strukturnoslozhnyh sistem [Reliability and safety of complex structure systems]. St. Petersburg, Izd-vo S.-Peterb. un-ta, 2007. 276 p.
• Chertykovtsev V.K. Teoreticheskie osnovy obespechenija bezopasnosti zhiznedejatel'nosti cheloveka [The theoretical framework for ensuring human safety]. Samara, 1999. 58 p.
• Shaduya V.L., Filonov I.P. Chelovek i mashina: ucheb. posobie [Man and machine: textbook]. Minsk, Tehnoprint, 2004. 334 p.
• Belov P.G. Sistemnyj analiz i modelirovanie opasnyh processov v tehnosfere [System analysis and modeling of hazardous processes in technosphere]. Moscow, Akademija, 2003. 512 p.
• Nosov V.B., AmbartsumyanV.V. Bezopasnost' truda [Workplace safety]. Moscow, Engineering, 1994. 144 p.

WHEEL ROLLING RESISTANCE COEFFICIENT CALCULATION METHOD

Mikhaylov V.V., the Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republik of Belarus

The paper presents the method for calculating of rolling wheel resistance. The method is based on wheel loads, tire and supporting surface characteristics and wheel dynamic properties. It allows to determine the resistance of the rolling wheel in real time moving.

• O kojefficiente soprotivlenija kacheniju shin: predlozhenija v Pravila EJeK OON No. 30; No. 54: neofic. dokument OON. GRRF-58-10 [On the tire rolling resistance coefficient: proposals to UNECE Regulation number 30; Number 54: unofficial. UN document. GRRF-58-10]. 58-th session of GRRF, 2005.
• Novikov G.V., Pogorelov V.V., Shpilevskiy G.B. Avtomaticheskoe regulirovanie polnoprivodnyh transmissij samohodnyh mashin s besstupenchatymi transmissijami. Gipotezy [Automatic control of all-wheel drive transmissions for self-propelled machines with a continuously variable transmission. Hypotheses]. Avtomobil'naja prom-st' [Automotive industry], 2007, no. 8, pp. 17-19.
• Novikov G.V., Pogorelov V.V., Shpilevskij G.B. Problemy avtomaticheskogo regulirovanija polnoprivodnyh samohodnyh mashin s besstupenchatoj transmissiej [Four-wheel drive automatic control problems of self-propelled vehicles with continuously variable transmission]. Avtomobil'naja prom-st' [Automotive industry], 2006, no. 7, pp. 21-24.
• Valeev D.KH., Karabtsev V.S. Teorija razmernostej i soprotivlenie kacheniju shin [The theory of dimensions and the rolling resistance of tires]. Mehanika mashin, mehanizmov i materialov [Mechanics of machines, mechanisms and materials], 2008, no. 2, pp. 30-32.
• Moskovkin E.V., Vokhminov D.E. Shkel A.S. Novyj metod raschetnyh issledovanij [A new method for PBX / E.V. computational research]. Avtomobil'naja prom-st' [Automotive industry], 2007, no. 8, pp. 33-35.
• Tokarev A.A. Opredelenie kojefficienta soprotivlenija dorogi po skorosti i puti vybega [Defining of road coefficient of resistance at speed and run-out path] Avtomobil'naja prom-st'[Automotive industry], 1998, no.1, pp. 17-18.
• Tarnovskiy V.N., Gudkov V.A., Tretyakov O.B. Kak uvelichit' probeg shin. Sovety avtoljubiteljam [How to increase the tire life. Tips to auto enthusiasts]. Moscow, Transport, 1993.
• Petrushov V.A., Shuklin S.A., Moskovkin V.V. Soprotivlenie kacheniju avtomobilej i avtopoezdov [The rolling resistance of cars and trucks]. Moscow, Mashinostroenie, 1975. 224 p.
• Ulyanov N.A. Kolesnye dvizhiteli stroitel'nyh i dorozhnyh mashin: Teorija i raschet [Wheeled movers of building and road machines: Theory and calculation]. Moscow, Mechanical engineering, 1982. 279 p.
• Knoroz V.I., Klennikov E.V. Shiny i kolesa [Tires and wheels]. Moscow, Mashinostroenie, 1975. 183 p.
• Grishkevich, A.I. Avtomobil'. teorija [Automobile theory]. Minsk, Vysh. shk., 1985. 208 p.
• Algin V.B., Mikhaylov V.V. Metodika rascheta nagruzochnogo rezhima traktornoj transmissii s uchetom kinematicheskogo nesootvetstvija, reaktivnyh momentov vedushhih mostov i otbora moshhnosti [Methods of calculating of the load mode of the tractor transmission, taking into account the kinematic inconsistency, jet drive axles moments and take-off power]. Trudy "Jenergosberegajushhie tehnologii i tehnich. sredstva v s.-h. pr-ve" [Proc. “Energy-saving technologies and techniques in agricultural production”]. 2008, pp. 37-40.
• Guskov A.V. Uprugie i dissipativnye svojstva shin vedushhih koles traktorov [Elastic and dissipative properties of the tires of the drive wheels of tractors]. Traktory i s.-h. mashiny [Tractors and agricultural machinery], 2007, no. 8, pp. 33-34.
• Tsitovich I.S., Mikhaylov V.V. Dinamika transmissii samohodnogo kombajna s gidroobemnoj peredachej [Dynamics of transmission of self-propelled combine harvester with hydrostatic transmission]. Ves. Nac. akad. navuk Belarusi. Ser. fiz.-tjehn. navuk [News of the NAS of Belarus. Edition of physical and engineering sciences], 1986, no. 4, pp. 80-85.