Articles published in the issue 09, 2021

Express method for measuring of the efficiency of flaw detection equipment during high-speed rail inspection

Keywords: rails, high-speed testing, ultrasonic flaw detection, diagnostic complex, car-flaw detector, rail control efficiency, limit control speed, conventional  length of reflector, integral parameter.

Markov Anatoliy — D.Sci., Deputy General Designer, Head of the Department «Methods and means of nondestructive testing», Radioavionica JSC. St. Petersburg. Russia. E-mail: amarkovspb@gmail.com

Maksimova Ekaterina — Head of the nondestructive testing laboratory, Radioavionica JSC.  St. Petersburg. Russia.  E-mail: kuznetsova@radioavionica.ru

Abstract. High-speed diagnostic systems are being widely implemented on the Russian railway network. They carry out ultrasonic testing of rails at speeds from 10 to 120 km/h. In such a wide range of scanning speeds, the conditions of ultrasound testing change significantly. There are practically no effective methods for checking the technical characteristics of flaw detection equipment. In this article, a method of rapid verification of the operability (efficiency) of rail testing systems is proposed. It allows you to determine the limit control speed for different sections of the track, taking into account their state.

Organization of maintenance of the track at the high-density heavy traffic lines

Keywords: high-density heavy traffic lines, track maintenance, track alignment, preventative measures of the track deteriorations.

Pevzner Viktor — D.Sci., professor, chief researcher of the Science Center «TsPRK» of JSC «VNIIZHT». Moscow, Russia. E-mail: vpevzner@list.ru

Lisitsyn Angrey — head of the Department of Labor Protection, Industrial Safety and Environmental Control of JCS «Russian Railways». Moscow, Russia. E-mail: alis2008@mail.ru

Sidorova Elena — Ph.D, senior researcher of the Science Center «TsPRK» of JSC «VNIIZHT». Moscow, Russia. E-mail: Sidorova.Elena@vniizht.ru

Chechelnitskiy Aleksander — head of the Department «Track and track facilities» of the Central Directorate of Infrastructure — branch of the JCS «Russian Railways». Moscow, Russia. E-mail: chechelnickiyai@center.rzd.ru

Baronayte Renata — leading engineer of the Science Center «TsPRK» of JSC «VNIIZHT». Moscow, Russia. E-mail: Baronayte.Renata@vniizht.ru

Vaganova Olesya — head of the Normative and Methodological Department of the track and structure management of the Central Directorate if Infrastructure – branch of the JSC «Russian Railways». Moscow, Russia. E-mail: vaganovaon2@center.rzd.ru

Shapetko Kirill — researcher of the Science Center «TsPRK» of JSC «VNIIZHT». Moscow, Russia. E-mail: Shapetko.Kirill@vniizht.ru

Grin Elena — Ph.D., associate professor at the Department of railway tracks and track facilities of Russian University of transport (MIIT). Moscow, Russia. E-mail: miit-grin@yandex.ru

Abstract. The article is devoted to the issue of organizing the maintenance of the track at the high-density heavy traffic lines of the Russian railways network. The relevance of the study has been substantiated and the main features of high-density heavy traffic lines responsible for the need for a special system of their maintenance are given.

The issues of determining the total productive time for maintenance are considered and recommendations for their implementation at the high-density heavy traffic lines are given. Particularly the problem of performing preventative measures of the track deteriorations on such lines is highlighted, taking into account statistical data, and predictive models of track condition with and without taking into account preventive alignments are proposed.

The results of the statistical analysis of the data characterizing the time expenditure on the occurrence of incidents are presented, and the measures for increasing the possible capacity of track alignment are considered.

Influence of the state of the track on the level of interaction with the rolling stock

Keywords: drawdown of the path, stresses in the rails, stress intensity coefficient, vertical forces, the speed of movement, calculation algorithm, wheel and rail contact, the Universal Mechanism software package.

Abdurashitov Anaioly — Ph.D., head of department of PKB I – branch of Russian Railways. Moscow, Russia. E-mail: abdran@yandex.ru

Ovchinnikov Dmitry — Ph.D., Associate Professor of the Department «Road and Track Management», Samara State University of Railway Transport. Samara, Russia.  Е-mail: d-mon38@yandex.ru

Pokatsky Vladimir — Ph.D., Associate Professor, Samara State Transport University. Samara, Russia.  Е-mail: d-mon38@yandex.ru

Kadyrov Rifat — leading designer department of PKB I – branch of Russian Railways. Moscow, Russia. Е-mail: rifat-kadyrov@yandex.ru

Abstract. A calculation model is presented to assess the effect of track subsidence on the stress level in the rails. The result of the calculation of the influence of the state of the track on the vertical dynamics in the «wheel—rail» system is given. The maximum permissible values of the rail defect according to code 21 are determined in the presence of deviations in the profile in the form of drawdowns.

Experimental studies of the wheel-rail interaction forces on a spatial curve

Keywords: transition curve, Vertical curve, spatial curve, modeling, forces, wheel and rail, defects, railway track, research, designing.

Akkerman Gennady — D.Sci., professor of the department of «Track and rail construction» of the Ural state University of Railway Transport. Yekaterinburg, Russia. E-mail: GAkkerman@usurt.ru

Kargapoltsev Dmitriy — Postgraduate student of the Department of «Track and rail construction» of the Ural State University of Railway Transport. Yekaterinburg, Russia. E-mail: DVKargapoltsev@gmail.com.

Abstract. Modern tendencies for designing and development of a railway system should take into account the development of technologies both in the designing and current maintenance of railway. The article researches the movement of rolling stock along current railroad curves in one of the parts of the Sverdlovsk railway, where was the imposition of the transition curve on the vertical curve in the profile according to the plan during the process of operation. Thus, «spatial» curve was formed. The article analyzes «spatial» curve influence on the rolling stock and forces both in the «wheel-rail» interaction and in inter-car spaces. Moreover, there are arguments given in favor of dropping the restrictions on the prohibition of designing combined transition and vertical curves.

Possibility to change the angle profile of the counter-rail SP-850

Keywords: switch, d-pad, controls, the shape, the width of the rut, gutters.

Korolev Vadim — Ph.D., associate Professor of the Department of «Transport construction» of the Russian University of Transport (MIIT). Moscow, Russia. E-mail: Korolevadim@mail.ru

Abstract. The parameters of the track width and the gutters on the cross nodes of the switches are analyzed. New promising scientific developments of the counter-rail special profile are presented. Variants of changing the rolling special profile of the corner of the counter-rail SP-850 are proposed.

Improving the efficiency of machine operation through improved management of their reliability

Keywords: failure, trouble-free operation, efficiency increase, reliability.

Shalamova Oksana — Ph.D., associate Professor of the Department of «Technology of Transport Engineering and Operation of Machines» of the Siberian Transport University. Novosibirsk, Russia. E-mail: oksana.sh73@mail.ru

Yadroshnikova Galina — Ph.D., associate Professor of the Department of «Technology of Transport Engineering and Operation of Machines» of the Siberian Transport University. Novosibirsk, Russia. E-mail: galinattm@bk.ru

Abstract. This article addresses the issue of managing the state of transport and technological complexes during operation as a complex technical and economic task, which allows ultimately to manage reliability and improve it.