Theory of Traction

• Rail Vehicles, Semester 1, position 2

Knowledge acquiring in designing, production and exploitation of railway vehicle, in designing of rail tracks as well as the organization of railway traffic. Introducing students with: - The Forces acting on railway vehicle, - Calculation methods for traction, resistance and braking force and the velocity, using modern computer tools, - The methods for determination of optimal movement conditions of railway vehicles, - Ways of solving practical problems related to the movement of railway vehicles and rail tracks configuration.

After successfully finishing of course students would be able to: - define tasks and way of functioning elements, subassemblies and assemblies of tractive vehicles; - calculate tractive effort, train resistance, braking force and velocity of railway vehicle using special software package; - discuss about advantages and disadvantages of the different types of power transmissions and their characteristics; - assessment of advantages and disadvantages of different types of coupling which can be used in tractive railway vehicles; - implementation of regulations and standards in the field of railway vehicle traction.

Characteristics of the railway transport, Analysis of the influencing factors on the traction forces, Transmission of traction forces – adhesion as requirement for traction forces, Traction features of high-speed railway vehicles, Traction features of the diesel traction railway vehicles, Basic characteristics of running gear and drive of traction vehicle, Traction features of the electric traction railway vehicles, Train resistance – main and additional resistance, High speeds train resistance, Railway vehicles braking force – characteristics of the braking process, Equations of the train.

Practical learning, Auditory exercises (Introduction to the examples in modern railway transport, Recapitulation of learned material necessary for passing this subject (mechanics, machine elements and electrical engineering), Using of computer tools to solve problems in train traction, Guidance of wheel set in track, The relative velocity of wheel set in relation to the rail, Forces at the wheel set edge point and the contact point of the wheel-rail , Basic characteristics of traction features, adhesion as requirements for traction forces , Basic characteristics of diesel and electric traction railway vehicles, The resistance forces in motion the train, Task (Determination of traction characteristics of the diesel traction vehicles with mechanical and hydraulic power transmission, Determination of traction characteristics of the diesel traction vehicles with electric power transmission, Determination of traction characteristics of the electric traction vehicle, Analytical determination of the resistance force when moving train, Solving differential equations of train ), Discussions and workshops.

Nothing

Class book, Literature that is available in the Faculty Bookstore and Library; Internet resources (KOBSON).

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 9
Laboratory exercises: 0
Calculation tasks: 10
Seminar paper: 5
Project: 0
Consultations: 0
Discussion/workshop: 6
Research study work: 0

Review and grading of calculation tasks: 5
Review and grading of lab reports: 0
Review and grading of seminar papers: 0
Review and grading of the project: 0
Test: 5
Test: 0
Final exam: 5

Activity during lectures: 10
Test/test: 20
Laboratory practice: 0
Calculation tasks: 30
Seminar paper: 5
Project: 0
Final exam: 35
Requirement for taking the exam (required number of points): 40

Lucanin, V., Theory of Traction, University of Belgrade Faculty of Mechanical Engineering, Belgrade, 1996. CIP 629.42(075.B) in Serbian; Andreas Steimel, Electric Traction - Motive Power and Energy Supply, Oldenbourg Industrieverlag Munich, 2008. ISBN 978-3-8356-3132-8; Brenna M., Foiadelli F., Zaninelli D., Electrical Railway Transportation Systems, IEEE PRESS, Wiley, 2018. ISBN:9781119386803; Tanasković J., Fundamentals of railway mechanical engineering, University of Belgrade Faculty of Mechanical Engineering, Belgrade, 2022. ISBN 978-86-6060-130-0 in Serbian