Articles published in the issue 11, 2021

Modern rail fastenings in the St. Petersburg metro

Keywords: subway superstructure, intermediate rail fastening system Vossloh System 300 UTS for P50 rails, vertical movements, vibration acceleration.

Kolodkin Mikhail — Head of Track Service, State Unitary Enterprise «Petersburg Metro». E-mail: kolodkin.m@way.metro.spb.ru

Nurullin Oskar — General Director of Vossloh Bahn-und Verkehrstechnik LLC. E-mail: vossloh-rail.ru

Zamukhovsky Alexander — Ph.D., Associate Professor of the Department of «Way and track facilities» Russian University of transport (MIIT). E-mail: miit.ppx@gmail.com

Semyonov Evgeniy — engineer of the Research Laboratory «Railway Track Testing» Russian University of transport (MIIT). E-mail: zhenek100396@gmail.com

Аbstract. The article presents the results of operational observations of the operation of the subway track with intermediate rail fastening system Vossloh System 300 UTS with P50 rails. The results of measuring the vertical displacements of rails relative to the track concrete in a curve with a radius of 150 m, the results of measuring vibration accelerations are given.

Modeling of the interaction of a bridgework and a rolling-stock under the increased tonnage rating of a train

Keywords: moving load, modeling, heterogeneous rolling stock, tonnage rating of a train, vibration diagnostics, finite-element model, vibration amplitude, forced vibration frequency, dynamic characteristics, Baikal-Amur Railway.

Usoltsev Andrey — Head of the Department, Siberian Research Institute of Bridges, Siberian Transport University. Novosibirsk, Russia. E-mail: uam@stu.ru. SPIN-code: 6167-6140.

Popova Ekaterina — Senior Researcher, Siberian Research Institute of Bridges, Siberian Transport University. Novosibirsk, Russia. E-mail: kgp@stu.ru

Kobelev Kirill — Engineer, Siberian Research Institute of Bridges, Siberian Transport University. Novosibirsk, Russia. E-mail: jamkka@mail.ru. SPIN-code: 7814-9100.

Zhunev Kirill — Engineer, Siberian Research Institute of Bridges, Siberian Transport University. Novosibirsk, Russia. E-mail: junev.kirill@yandex.ru. SPIN-code: 7887-5244.

Abstract. The article presents the results of an experimental and theoretical study of the interaction of a rolling stock with elements of a unique bridge.

The results of the simulation modeling allowed finding that crossing a bridge by a rolling stock, which has a homogeneous weight of its cars, does not cause any significant additional dynamic effects, regardless of the tonnage rating and the speed of the train. However, when moving across a bridge by a freight train of a heterogeneous structure (in terms of its cars’ weight) at speeds from 20 to 40 km/h, the frequencies of forced vibrations coincide with the frequencies of natural vibrations of spans and supports, that causes a dynamic effect that significantly exceeds the standard value.

Improving the technology of laying the rail-sleeper grid in small radius curves

Keywords: laying of the track in curves of small radius, the force of pressing the rails to the sub-rail supports, the lateral rigidity of the rail-sleeper grid, the bending of the rail length when the intermediate rail fasteners are loosened.

Ovchinnikov Dmitry — Ph.D., Associate Professor of the Department «Road and Track Management», Samara State University of Railway Transport. Samara, Russia. E-mail: ovchinnikov@samgups.ru. SPIN-code: 2384-0535.

Dorofeev Yakov — Senior Lecturer of the Department «Road and Track Management», Samara State University of Railway Transport. Samara, Russia. E-mail: yakovputeez@mail.ru. SPIN-code: 9406-5540.

Tarasov Andrey — Senior Lecturer of the Department «Road and Track Management», Samara State University of Railway Transport. Samara, Russia. E-mail: andrey_2008@mail.ru. SPIN-code: 1771-9604.

Gallyamov Damir — Lecturer of the Department «Road and Track Management», Samara State University of Railway Transport. Samara, Russia. E-mail: gallyamov_damir@bk.ru. SPIN-code: 3896-0667.

Abstract. The article presents a method for improving the technology of laying rail-sleeper grid links in curved sections of small radius by changing the lateral stiffness of the rail length. The different stiffness of the rail length in the horizontal plane is achieved by weakening the grid section by changing the forces of pressing the rails against the sub-rail supports. Thus, a uniform bending of the link with a constant curvature is achieved, and also when laying the path, the force required to create the desired bending radius of the curve is reduced.

He influence of operational conditions on the organization of work on a closed stage

Keywords: operational parameters of the railway track, technology of «closed stage», development of mechanized complexes, organization of repair and track work.

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

Galysheva Evgeniya — category II technologist, Track machine station № 262 of the Northern Railway. E-mail: eugeniya97@gmail.com

Abstract. The article analyzes the influence of the operational parameters of the railway track on the organization of the implementation of the track by the technology of «closed stage».

Protection against degradation of permafrost soils on snow-covered areas

Keywords: thermocomplex, deflector, permafrost

Valiev Novruz AliOgly — road master on the roadbed of the Novocharskaya distance of the East Siberian Directorate of Infrastructure of JSC «Russian Railways». Novaya Chara, Russia. E-mail: novruz_valiev@mail.ru.

Kovenkin Dmitriy — Ph.D., associate Professor, head of the Department of «Way and track facilities» of the Irkutsk State Transport University. Irkutsk, Russia. E-mail: kovenkin_da@irgups.ru. SPIN-code: 6005-4179, AuthorID: 520202

Abstract. The article describes the problems of maintaining the railway track in the presence of permafrost. Measures are proposed to prevent the degradation of permafrost soils at the base of the roadbed on the sections of the Novo-Charskaya distance of the track.

Integration of coordinate and relative measurements of the railway track for tamping

Keywords: method of coordinate, tamping track

Manoylo Dmitriy — Ph.D., associate Professor of the Department of «Geodesy, geoinformatics and navigation», Russian University of Transport (MIIT). Moscow, Russia. E-mail: m_dmit@mail.ru

Abstract. The technology of setting the railway to the design position using coordinate methods based on a high-accuracy coordinate system is considered.

Influence of profile outlines in the wheel-rail system on the stress-strain state of the track

Keywords: high-speed traffic, railway track, modeling, stress-strain state, outline of wheel and rail profiles, wheel rental, contact pressure, vertical forces.

Abdurashitov Anatoly — Ph.D., associate Professor, Head of department of PKB I — branch of JSC «Russian Railways». Moscow, Russia. E-mail: abdran@yandex.ru

Yurkova Yulia — postgraduate student of the department of «Railway track and track facilities» of the Russian University of Transport (MIIT). Moscow, Russia. E-mail: y.lenin@bk.ru

Abstract. Based on the experience of operation on high — speed sections of the Russian railways using the finite element method, a model of the stress-strain state of the railway track is developed depending on the shape of the profiles in the «wheel-rail» system. The results of calculations of the interaction forces of the track and rolling stock on the sections of high-speed traffic, depending on the state of the rolling surface of the rails and wheels, are presented.