Determination of location of the most lateral forces at motion of the rolling stock through the curve

2017 ◽  
pp. 101-110
Author(s):  
Dmitri Alexandrovitch Skutin ◽  
Keyword(s):  
Rolling Stock ◽  
Lateral Forces

Development of a device for application of vertical and lateral forces on rail head for determination of scale of strain measurement circuits for measuring influence of rolling stock on track

2020 ◽  
pp. 50-55
Author(s):  
Darya Vladimirovna Rasshhepkina ◽  
◽  
Mariya Viktorovna Zimakova ◽  
Dmitriy Vladimirovich Beloborodov ◽  
◽  
...  
Keyword(s):  
Strain Measurement ◽  
Structural Strength ◽  
Lateral Force ◽  
Rolling Stock ◽  
Vertical Force ◽  
New Device ◽  
Rail Head ◽  
Lateral Forces ◽  
Axis Of Symmetry

On the basis of analytical method of studying devices for the application of forces on a rail head and numerical method of calculating structural strength the authors have developed a new device for loading the rail head by vertical and lateral forces. The device that simulates force of wheel influence on rail allows applying vertical force on the axis of symmetry and with the offset of ±20 mm simultaneously with lateral force. Due to the lightened collapsible frame and the existence of roller bearings the device is comfortable in use, which contributes to the increase of speed of tests on the influence on track and researches in this sphere.

Tribology of rail bogie

2018 ◽  
Vol 77 (4) ◽  
pp. 230-240
Author(s):  
D. P. Markov
Keyword(s):  
Contact Fatigue ◽  
Basic Element ◽  
Difficult Problem ◽  
Railway Track ◽  
Rolling Stock ◽  
Kinematic Parameters ◽  
Approximate Estimation ◽  
Railway Bogie ◽  
Classical Calculation

Railway bogie is the basic element that determines the force, kinematic, power and other parameters of the rolling stock, and its movement in the railway track has not been studied enough. Classical calculation of the kinematic and dynamic parameters of the bogie's motion with the determination of the position of its center of rotation, the instantaneous axes of rotation of wheelsets, the magnitudes and directions of all forces present a difficult problem even in quasi-static theory. The paper shows a simplified method that allows one to explain, within the limits of one article, the main kinematic and force parameters of the bogie movement (installation angles, clearance between the wheel flanges and side surfaces of the rails), wear and contact damage to the wheels and rails. Tribology of the railway bogie is an important part of transport tribology, the foundation of the theory of wheel-rail tribosystem, without which it is impossible to understand the mechanisms of catastrophic wear, derailments, contact fatigue, cohesion of wheels and rails. In the article basic questions are considered, without which it is impossible to analyze the movement of the bogie: physical foundations of wheel movement along the rail, types of relative motion of contacting bodies, tribological characteristics linking the force and kinematic parameters of the bogie. Kinematics and dynamics of a two-wheeled bogie-rail bicycle are analyzed instead of a single wheel and a wheelset, which makes it clearer and easier to explain how and what forces act on the bogie and how they affect on its position in the rail track. To calculate the motion parameters of a four-wheeled bogie, it is represented as two two-wheeled, moving each on its own rail. Connections between them are replaced by moments with respect to the point of contact between the flange of the guide wheel and the rail. This approach made it possible to give an approximate estimation of the main kinematic and force parameters of the motion of an ideal bogie (without axes skewing) in curves, to understand how the corners of the bogie installation and the gaps between the flanges of the wheels and rails vary when moving with different speeds, how wear and contact injuries arise and to give recommendations for their assessment and elimination.

scholarly journals DETERMINATION OF RAILWAY ROLLING STOCK OPTIMAL MOVEMENT MODES

2017 ◽  
Vol 0 (6) ◽  
pp. 27-31
Author(s):  
A. N. Petrenko ◽  
B. G. Liubarskiy ◽  
V. E. Pliugin
Keyword(s):  
Rolling Stock ◽  
Optimal Movement ◽  
Railway Rolling Stock

scholarly journals Online Determination of Graphene Lattice Orientation Through Lateral Forces

2016 ◽  
Vol 11 (1) ◽  
Author(s):  
Yu Zhang ◽  
Fanhua Yu ◽  
Guangyong Li ◽  
Lianqing Liu ◽  
Guangjie Liu ◽  
...  
Keyword(s):  
Lattice Orientation ◽  
Lateral Forces ◽  
Graphene Lattice

Mathematical Justification of the New Method of Determination of Wheel Pair’s and Rail’s Damage

2009 ◽  
Author(s):  
Nikoloz Mgebrishvili ◽  
Guri Sharashenidze ◽  
Manana Moistsrapishvili ◽  
Sergo Sharashenidze ◽  
Liana Kuparashvili ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Mobile Device ◽  
Traffic Safety ◽  
Economic Effect ◽  
Rolling Stock ◽  
Wheel Pair ◽  
Railway Traffic ◽  
Accuracy Of Measurement ◽  
Mathematical Justification

Development of modern railways largely depends on the control of intactness of the wheel pairs and rails. It is impossible to ensure safety and increase the speed of railway traffic without providing such control. Detection of the wheel pairs’ and rails’ wear and damage is one of the key problems of railway science. Many scientific works are accomplished and lot of devices are elaborated in this field, but the mentioned problem still remains urgent. In order to increase the traffic safety, the group of authors has proposed a constructional scheme of the mobile device for detection of wheel pairs’ and rails’ wear and damage, which will have increased accuracy of measurement. Increasing of accuracy of measurement is carried out on the basis of development of mathematical model, which provides the realization of equal wear of wheel pairs’ as well as ones no equal wear. By installation of the proposed device on each wheel pair of each railcar of the rolling stock, the automatic control of wheel pairs’ and rails’ condition will be achieved. Namely: -Detection of the worn out wheel pair and determination of wear degree; -Detection of the damaged wheel pair; -Identification of the worn out or damaged wheel pair. Besides, on the basis of elaborated mathematical model: -Detection of the worn out rail; -Detection of the damaged rail; -Identification of location of the worn out or damaged rail. The obtained information will be constantly connected to the locomotive computer system. Therefore, for checking rolling stocks, there will no longer be need to build expensive stationary systems, to move trains great distances for their inspection and in the result, the time lost for stoppage will be saved. So, with the help of proposed mobile device, the traffic safety increases and at the same time expenses for detection of wheel pairs’ wear and damage decrease, which results in significant economic effect.

Determining the optimal load capacities units of forestry rolling stock

2015 ◽  
Vol 5 (4) ◽  
pp. 97-102
Author(s):  
Макеев ◽  
Viktor Makeev
Keyword(s):  
Load Capacity ◽  
Scientific Paper ◽  
Rolling Stock ◽  
Optimum Load ◽  
Optimal Load ◽  
Load Unit ◽  
Time Optimal ◽  
The Cost ◽  
Cost Of Transportation

Improving the efficiency of freight transport and industrial processes of forest complex is of great importance in the production activities of its business depends on many factors. The most important factor is the choice of the type operated by forestry staff and capacity of its units. In a scientific paper delivered and successfully solved the problem of determining the optimum load capacity of rolling stock unit forestry given distance transportation of timber cargo and average technical speed of vehicles in the transportation of timber cargo. At the same time optimal load unit Forestry rolling stock is determined by the conditions at the lowest cost to transport certain types of timber cargo and operational performance logging train (short log). The formula determining the cost of transportation of one ton (1 m3) timber cargo, which was the basis for the determination of the optimum load capacity of logging trucks. For greater clarity of how the optimal load on the logging train hauling timber (timber assortments) of the distance transportation, ways to perform loading and unloading operations and technical speed on the example of existing timber companies (Kulikovskii forestry) built a graph.

scholarly journals Determination of the maximum dangerous width of a rail track on a reinforced concrete base with fasteners of the КБ type, taking into account all influencing factors

2021 ◽  
pp. 113-120
Author(s):  
Vadym Novikov ◽  
Andriy Babenko ◽  
Oleksandr Kharkivskyi ◽  
Olena Olexandrivna Tkachenko
Keyword(s):  
Reinforced Concrete ◽  
High Speed ◽  
Railway Track ◽  
Rolling Stock ◽  
Lateral Direction ◽  
Maximum Width ◽  
Rail Track ◽  
Emergency Braking ◽  
Simultaneous Influence

Railway track retention standards in Ukraine do not take into account theconstruction of the subrail base, but regulate one for all types maximum dangerous value of the trackwidth, which was changed from 1546 mm to 1548 mm without any justification of scientific researchor explanations of the effects of tolerances the width of the rail track and the wheel track, which ingeneral at that time were not fully investigated but taking into account the emergence anddevelopment of new scientific problems associated with the emergence of intensive lateral wear ofrails and ridges of locomotive and wagon wheels. The deterministic dependences of lateralimpressions of the P65 type rail thread head on the simultaneous influence of vertical and horizontalforces for the newly installed repair profiles of UZ rolling stock on the basis of previously performedexperimental and theoretical studies were investigated. The results allow at this stage of research todetermine and calculate the practical values of the maximum dangerous width of the track, in whichthe subrail base consists of reinforced concrete sleepers and separate rail fasteners, which are usedboth on conventional highways with mixed traffic and on high-speed lines UZ.The article establishes the need to take into account new factors influencing the dangerouswidth of the rail track with intermediate rail fasteners of separate type depending on the load stress of sections and new repair profiles of rolling stock, as well as wear processes of intermediate railfasteners type KБ and its elements on the appearance of elastic backlash in the lateral direction fromthe influence of the guide wheels of the rolling stock. The recommended value of the maximum widthof the rail track for areas where service or emergency braking is applied - 1550 mm, taking intoaccount that the contact of the wheel and the rail is not at a point, but on an ellipse. The establishednorm of the maximum width of a rail track allows to define economic efficiency of introduction in theconditions of operation of a track in curved sections of a track of small radii with limited use of themaximum admissible lateral wear (15 mm) of a head of a rail thread provided that the normal-forcedentry of rolling stock carts.

Requirements for check-rail switch joints

2021 ◽  
pp. 48-52
Author(s):  
B. E. Glyuzberg ◽  
◽  
A. A. Loktev ◽  
I. V. Shishkina ◽  
M. E. Berezovskiy ◽  
...  
Keyword(s):  
Calculation Method ◽  
Rolling Stock ◽  
Strain Condition ◽  
Stress Strain ◽  
Necessary And Sufficient

The paper is devoted to a problem of passing of rolling stock wheelsets with minimum deterioration of a crossing joint of a switch. The authors have formulated criteria representing necessary and sufficient requirements, on the basis of which it is possible to determine permissible values of check-rails wear and dimensions of their gutters. The paper also presents a method for calculation of rolling stock passage on the crossing joint equipped with check-rails that are not connected to running rails. With the u se of the experimental and calculation method the authors have highlighted stages for determination of stress-strain condition of check-rails. The have analysed the operation of check-rails made of RK special profiles that are mounted to a running rail by inserts. As a result, the authors have assessed the advantages of application of check-rails with mounts that are not connected to running rails. Since the method of check-rails calculation for the operation in other parts of the switch is similar, they have analysed the operation of a protector checkrail for switches and discussed the efficiency and disadvantages of its application.

Sign in / Sign up

Export Citation Format

Share Document