Rail Vehicles Brake Components Test Bench Utilisation

Abstract

Reduction of noise due to rolling contact of wheel and rail for fright cars is one of the principal tasks of the European railways to be solved. Experts of railways, industries and universities were engaged during the last about ten years to search for technical solutions. An important noise reduction of fright cars can be achieved by replacing the cast iron brake shoes by composite brake shoes. Doing that, two directions have been taken into consideration. This is due to the fact, that at that time most composite brake shoes were based on friction coefficients were far away from that ones of the cast iron brake shoes. Applying such friction materials on existing vehicles would have as a consequence the change of braking forces acting on the wheels. These types of brake shoes (K-block) show a friction coefficient which is higher than that one of cast iron. As a consequence the application of the silent composite brake blocks of type K affords the adaptation of the braking system of the vehicle, what is cost intensive. For these reason, the application of K-brake block was proposed for new built vehicles. For existing vehicles solutions having the same friction coefficient as the cast iron brake shoes were requested (LL-Brake doing in this way, the modification of the braking equipment of existing fright cars could be avoided.

Analysis of the distribution of temperature fields in the braked railway wheel

“…Investigated issue is process of non-stationary temperature fields spreading, generated by the braking railway vehicles The thermal load on the wheels has a significant rate on the influences due braking by the brakes, that lead to wear -modification and damage of the wheel tread [5,15,21]. In the braking process we have to take into account the fact, that the wheel is a brake block not only overheated at the point of their contact but also loaded with normal and tangential stress, which is the source and the necessary precondition for the braking process creation [7,14]. With regard to the braking design and the braking mechanism, we include braking brakes between the adhesive brakes because the braking effect of the vehicle itself with respect to the track is realized by contacting the wheel and the rail via the contact patch [12,18].…”

Structural Analysis of a Modified Freight Wagon Bogie Frame

“…Nevertheless every intervention in the load-bearing construction requires a through strength calculations supported by experimental measurements on test benches [15,16]. The bogie frame is the main carrying part of the bogie.…”

Strength Analysis of a Steel Structure of Weights Boxes by Means of Simulation Computations

“…2), but the thickness was for individual parts different. In this simulation there were used nine various thicknesses -3, 5,6,8,9,10,11,15 and 17 mm.…”

“…4 left) we launched calculation. After its successful running we checked analysis results in PostProcessor modulus of Adina software [9][10][11][12].…”