In this study, core technologies are developed for a bogie system to enable the bogie to run on a track that has a steep gradient and sharp curves. The bogie is designed to run on a minimum curve radius of 10 m by developing independently rotating wheels and axles. It is also designed to run on a maximum gradient of 180‰ with reduced noise by developing an elastic pinion. The traction motor power required for a steep gradient is calculated and reflected in the design of the traction system. In addition, a band braking system is developed to improve the braking force while running on a steep gradient track. The developed main parts are tested to evaluate their performance and are subsequently applied to the bogie systems designed to run on a steep gradient and sharp curve tracks. The maximum load on the bogie frame is reassessed by considering the running conditions on a track that has a steep gradient and sharp curves. The safety of the bogie frame is verified through a loading test. Finally, the developed bogie system with the incorporated parts and core technologies undergoes a running test on a roller rig for evaluating its performance.

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In this study, loading tests and a strength evaluation of the bogie frame were conducted to verify the structural safety of the bogie system in an intermodal tram, which runs with cars on a road track. The loads were calculated taking into account the features of the road track with many sharp curves and steep gradients, which are different from the track of conventional railway. They were compared with the loads specified in the previous standard specifications. After the comparison, it was confirmed that the loads acting on the bogie system operating on a road track are slightly different from the specified loads. The specified vertical load of the standard specification for all kinds of trains is conservative, but the specified lateral and longitudinal loads are less than the calculated loads. The application of the actual loads was proven to be reasonable in the development of a new railway system. Based on the defined loads, the bogie frame was fabricated on which strain gauges were attached. It was set on the large loading frame so that the stresses could be measured when loads were applied by hydraulic actuators. After measuring the stresses, it was shown that they were below the allowable stress, which verified the structural safety of the bogie frame. Keywords : 556 ContentsSpec.