• Rail Vehicles, Semester 2, position 2

1. Understanding different constructions of the freight wagons and passenger coaches 2. Acquiring the knowledge necessary to understand the functioning of wagon or coach assemblies 3. Application of knowledge in the design, development, repair and maintenance of wagons and coaches

After completion of the course the student should be able to: 1. Explain the functional and structural characteristics of various types of rolling stock. 2. Explain the tasks and functioning principles of the assemblies of the rail vehicles. 3. Identify actions required to resolve failures in operation and maintenance of rail vehicles. 4. Apply appropriate regulations and standards for design and maintenance of railway vehicles. 5. Applicate computer tools for calculating and designing rail vehicles.

General characteristics of the elastic suspension system. Suspension with helical springs. Suspension with leaf springs. Suspension with rubber springs. Air suspension system. Elastic pendulum-based systems. Natural and forced tilt of the rail vehicles in curves. Torsional characteristics of the rail vehicles. Damping elements. Active and passive suspension systems. Draw-buff gear. Design and mechanical characteristics of buffers. Draw gear. Automatic couplers. Equipment of the passenger coaches. Doors, windows, stairs. Heating and air conditioning requirements and design performance. Electrical installation. Passenger information system. Fire protection. Noise inside the vehicle and noise emission. Specifics of passenger coaches for high speeds. Specifics of the freight wagons for increased speeds.

Initial requirements and general constraints for design of the elastic suspension system. Design of suspension springs system with double ring links. Design of the systems with helical springs. Design of the systems with rubber springs. Air suspension system design. Determination of the torsional characteristics of the rail vehicle. Design of the anti roll system. Active and passive tilt systems. Design of buffers. Limitation of space on the ends of the wagon. Calculation of the buffer plates dimensions. Calculation of the draw gear angular deflection in curves. Gangway connection systems. Examples of design solutions for different equipment of the wagons.

Previously passed course Railway vehicles 1.

D. Milkovic, Rail vehicles, hand-out G. Simic, Instructions for writing student papers, hand-out For preparation tasks as a basis should be used the appropriate regulations and standards

Total assigned hours: 75

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

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

Review and grading of calculation tasks: 0
Review and grading of lab reports: 0
Review and grading of seminar papers: 0
Review and grading of the project: 6
Test: 4
Test: 0
Final exam: 5

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

Simic, G., Railway vehicles, Constructions and calculations, Faculty of Mechanical Engineering, Belgrade, 2013., ISBN: 978-86-7083-809-3