Study on the Adhesion Characteristic between Wheel and Rail Using the Scaled Test-Bench

초록

Railway vehicles driven by wheels obtain driving force required to propulsion and braking by adhesion force between wheels and rails, this adhesion force is determined by multiplying adhesion coefficient of the friction surface by the applied axle load. In railway system, this adhesion coefficient is usually defined as the maximum traction/braking coefficient. To get the maximum traction/braking force represented as the adhesion coefficient, it is necessary to estimate the adhesion coefficient according to the speed difference between the wheel and the rail on the contact point. Scaled adhesion test-bench is an experimental device that contacts mutually with disc rollers which are equivalent to wheels and rails of railway vehicles, and rotates mutually by friction by driving each motor connected with roller axes. Test procedure for adhesion characteristics on slip change is following