• Proceedings of the KSR Conference
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• 2004.10a
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• pp.601-605
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• 2004

Railway wheel is the important element of rolling-stock in the viewpoint of running safety. Thus, the material properties of strength, fatigue crack, durability are needed, and the standards for test and criteria of whee] are established to guarantee quality of wheel. In the meantime, the suppliers for wheel in domestic are varied from domestic monopolization to diverse company of China, Russia, Czech Republic, etc. The uniform quality of wheel is important from a maintenance point of view. We collected wheel samples of diverse vendors to analyze the uniformity of wheel on the basis of korea national standard. We tested material properties and analyzed the test data statistically.

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.1118-1123
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• 2003

Based on the design requirements(size, strength, structure, weight, and etc.) for the rubber-tired AGT vehicle, carbody made of aluminum alloy is designed. The analysis of strength and stiffness is performed in the designed carbody, which results in the modification for optimal shapes and structures. It consists of a under frame, side frame, roof frame, end frame and forehead frame. After the carbody manufactured, tests are performed, which are vertical load test, longitudinal compressive load test, twisting load test, twisting natural frequency measurement, bending natural frequency measurement and 3 points supporting test. Results of them can guarantee a structural safety.

• Journal of the Korean Society for Precision Engineering
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• v.29 no.6
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• pp.621-625
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• 2012

Conventionally, to measure derailment coefficient of a railway wheel, strain gauges for lateral force measurement are attached to both side of the wheel. But narrow gap between railway wheel and traction motor makes it difficult to attache the strain gauges at the inner side of wheel. In this study, to overcome the hard accessibility to the strain gauge points by narrow gap, a new Wheatstone bridge connection method is presented by attaching all the strain gauges at the outer side of wheel with a new bridge connection. We evaluate the running safety of railway vehicles in accordance with railway safety regulations. The experimental results obtained shows higher sensitivity than conventional methods and the derailment coefficient measurement procedure becomes simpler.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.262-267
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• 2006

The maximum speed of the conventional railway rolling-stock which is restrained to 150km/h will be increased to 200km/h with the development of korean tilting train. The improvement of quality for railway wheel which is closely connected with the safety of train is needed. On the one hand, the speed limit of the wheel standard for the conventional rolling-stock is 150km/h. Thus, a study on the safety of wheel structure, test items and criteria is needed to apply this standard to tilting train wheel. This study is started to present the improvement scheme and to extend the speed limit for conventional wheel standard. For this, we studied the safety of wheel structure, wheel material tests and the criteria for wheel standard and show the results