• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2005.06a
• /
• pp.355-360
• /
• 2005

This paper describes how to measure the running safety using vibration accelerometers theoretically, and considers the effect of vibration parameters, such as amplitude and period, on the running safety by numerical analysis, which shows that the running safety are decreased as those parameters are increased.

• Proceedings of the KIEE Conference
• /
• 2001.07b
• /
• pp.1266-1268
• /
• 2001

ProfiBus provides real-time data communication among field devices in the EMU (Electrical Multiple Unit) and TCMS (Train Control Monitoring System). This paper presents an adapt to Train Communication Network for EMU using ProfiBus DP(Decentralized Periphery) mathod, which is the layer 2 DDLM(Direct Data Link Mapper) protocol of ProfiBus.

• Proceedings of the KSR Conference
• /
• 2000.11a
• /
• pp.219-225
• /
• 2000

This study is to develop a Fe-based disc brake lining with sponge structure for rolling stock of 150km/h train and to concept design with 3 groove type for brake disc reducing hot hair-crack and certainly friction coefficient. The developing brake lining would be to presumption of saving 300 million won during one year

• Proceedings of the KWS Conference
• /
• 2004.05a
• /
• pp.290-292
• /
• 2004

In this paper, static and fatigue load tests for the specimens, components and carbody were carried out to investigate the strength of welded joints in aluminum rolling stock. Tensile load test results showed that the static strength of welded joint for heat-treated alloys is reduced significantly and fatigue strengths are scattered by the welding imperfections. Component and whole carbody fatigue test results showed agreements with the design fatigue strength standards for specimens of same joint detail. Test results revealed that full penetration welding and strict management of welding procedure are crucial for securing strength of welded joint in aluminum carbody.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2006.05a
• /
• pp.1453-1458
• /
• 2006

KTX Railway rolling stock wheel run its course to corrode, deteriorate and wear away through out the time. So it is natural that the performance and ability of wheel gets declined. The frequency characteristic analysis were accomplished to above trend and shock wave flow to wheels were examined. The result will be used to find Railway rolling stock wheel crack and maintenance method hereafter.

• Proceedings of the KSR Conference
• /
• 2004.10a
• /
• pp.663-667
• /
• 2004

Underframes of rolling stock structure are made of hot rolled steel of SS400 or SM490A. While these underframe steels are designed to satisfy the mechanical requirements, their corrosion behavior also should taken into account. Underframes are coated to prevent corrosion, but they are often defected by external factors to result in local corrosion which may cause the weakness of mechanical strength. Thus, the corrosion of underframe steels was examined through atmospheric corrosion test to estimate service life and safety.

• Proceedings of the KSR Conference
• /
• 2002.10b
• /
• pp.954-961
• /
• 2002

Ventilation system on passenger rooms should be designed for the health and comfort of the passengers. One of the main aim is to create an acceptable thermal environment without draught problems. The draught sensation increases when the air temperature decreases and the air velocity increases. Airflow in passenger rooms is turbulent. Lateral temperature and humidity gradients in the electric rolling stock have been studied. And, the difference in the mean temperatures measured at 0.7, 0.9, 1.2, 1.7 m above the floor. It has been found that temperature with large fluctuations caused more draught complains.

• Proceedings of the KSR Conference
• /
• 2000.05a
• /
• pp.652-659
• /
• 2000

The machine structure or parts has been arrive at a fracture, depend on crack by repeated load. Machine designer is estimate of fatigue strength in early stages the design for prevent fatigue fracture, then necessary its load history. This research study is using diesel locomotive in measurement of load history for fatigue design of rolling stock. The relation between velocity and amplitude of load history was found. We confirmed that the increase of velocity make to increase the magnitude of amplitude.

• Proceedings of the KSR Conference
• /
• 2005.11a
• /
• pp.569-574
• /
• 2005

In this study, test standards were developed for performance verification of the high speed(350km/h) rolling-stock. The performance test system consist of three type tests; the component test for core item, the completed car test for combined function & operation and the trial driving test for compatibility & interrelationship with infrastructure.

• Proceedings of the KSR Conference
• /
• 2003.10c
• /
• pp.307-311
• /
• 2003

Taegu subway fire accident happened on 18th February this year, which was recorded as the 2nd biggest subway accident in the world. The accident was inspected and reviewed by Task Force Team of MOCT and KRRI, which results in the integrated safety plan for subway system. Among the safety plan. this report describes the analysis of the accident causes and safety plan in the field of rolling stock.