• Journal of the Korean Society for Railway
• /
• v.19 no.5
• /
• pp.565-575
• /
• 2016

Wheel reprofiling is frequently conducted to remove faults such as flange wear, flat areas, and cracks that occur in railway vehicle operation. We analyzed the dynamic performances of a vehicle before and after wheel reprofiling to grasp the influence of reprofiling on the dynamic behavior of the vehicle. We measured the wheel profile of the test vehicle and conducted a running test to analyze the vibration and comfort characteristics of the test vehicle. The result of the test indicated that vibration of the test vehicle after wheel reprofiling was reduced compared to that before wheel reprofiling. And, comfort level of the test vehicle after wheel reprofiling was improved by about 3dB laterally and vertically. Consequently, the positive effect of wheel reprofiling on the dynamic performance of vehicle was verified.

• Railway Journal
• /
• v.13 no.5
• /
• pp.16-25
• /
• 2010

• Journal of the Korean Society for Railway
• /
• v.8 no.3 s.28
• /
• pp.40-44
• /
• 2005

• Railway Journal
• /
• v.16 no.1
• /
• pp.27-38
• /
• 2013

• Proceedings of the KSR Conference
• /
• 2004.06a
• /
• pp.710-713
• /
• 2004

The domestic railroad industry 2004 April high-speed railroad commerce is the actual condition which is operated and the fact that in spite of railroad standard field many portion does not correspond in international standardize actuality. International standard correspondence propulsion direction and hereafter of railway rolling stock wheel standard it was presented from the research which it sees and the railway rolling stock wheel relation KS standard establishment by law direction it introduced.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2004.05a
• /
• pp.176-176
• /
• 2004

21세기 고속철도시대에 진입하면서 차량고속화에 수반하여 주행안전성 면에서 빼놓을 수 없는 문제로 가장 중요한 탈선의 현상이 있다. 철도에 있어서 탈선은 대형사고로 직결되기 때문에 결코 쉽게 간과할 수 없는 부분이며, 철도가 다른 교통수단에 비해 상대적인 장점으로 내세울 수 있는 안전성을 확보하기 위하여 반드시 차륜과 레일 사이에서 발생하는 상호 작용력을 측정하여 탈선가능성을 평가하여야만 한다.(중략)

• Journal of the Korean Society for Railway
• /
• v.11 no.3
• /
• pp.23-28
• /
• 2008

• 전기의세계
• /
• v.37 no.4
• /
• pp.58-70
• /
• 1988

이하에서는 자기부상철도의 기본적인 동작원리와 특징, 개발 및 실용의 현상, 고속 시스템의 실용화의 전망, 종래의 철차륜, 철레일 방식의 철도와 비교했을 경우의 특징등에 대해서 설명한다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.7 no.6
• /
• pp.1012-1020
• /
• 2006

The crack that occurs on the wheels of railroad cars can be categorized into a surface crack that starts from the surface or a subsurface crack that starts from the inside and can be detrimental to safe railroad operations. Therefore, estimating the growth life span of this type of crack is very important. In this research, the stress distributions, displacements, and the growth-life spans of both surface cracks and subsurface cracks have been studied. By using the finite element analysis, especially in the life span prediction process, the stress conditions and the stress intensity factors of the crack tip have been discovered. The Paris formula has been used to analyze the growth-life span prediction.

• Journal of the Korean Society for Railway
• /
• v.8 no.5
• /
• pp.483-489
• /
• 2005

Railway wheel/rail contact conditions have influences on dynamic behavior of the rolling stock. If there are incompatibility problems between the wheel and rail, damages like wheel wear, wheel spalling, rail wear, etc are occurred. Especially wheel and rail profiles are important factors of vehicle curving performance, so compatibility studies between wheel and rail profiles have to be carried out preferentially. In this study, we have studied the compatibility between wheel and rail profiles of KNR conventional line to analyze the dynamic performances of the rolling-stock. Thus we showed the results relating to wheel/rail geometric contact, vehicle running performances as the change of wheel/rail combination.