ANALYSIS OF LATERAL STABILITY AND CONTACT OF BOGIE WHEEL WITH ROLLER-RAIL ON FULL-SCALE AND 1:5 SCALED ROLLER RIG

• Main Author: Susanto, Imam
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68536
• Institution: Institut Teknologi Bandung

A roller rig is a device to perform dynamic testing on railway vehicles without using actual rails. The full-scale roller rig is large, so it is less practical and requires expensive construction costs. An alternative design that can be made is a small-scale roller rig. Small-scale roller rig has a smaller size, so it is cheaper and and more practical for testing. Small-scale roller rigs are generally made with a scale of 1:5 for construction and installation in the laboratory. Although the advantages of 1:5 scale roller rig are known, the effect of scale reduction on test results cannot be known for certain yet. This creates the need to conduct research related to the effect of scale reduction on test result The design of a 1:5 scale roller rig is carried out using the scaling method. In this study, a 1:5 scale roller rig was designed using existing scaling methods, namely the MMU, DLR, and INRETS methods. Modeling and testing of the 1:5 scale roller rig was carried out using Universal Mechanism software. The tests carried out were lateral stability tests and bogie wheel contact tests with roller-rail. The critical speeds for the 1:5 scale model created by the MMU, DLR, and INRETS methods are 178 km/h, 244 km/h, and 221 km/h, respectively, while the critical speed on the 1:1 scale model is 220 km/h. The bogie wheel contact area with the roller-rail, normal force, and creep force were compared against the 1:1 scale model qualitatively using the graph of the test results. The differences, from smallest to largest in order, are the models made by the INRETS, DLR, and MMU methods. Thus, the most suitable scaling method for the roller rig model used in this research is the INRETS method.