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서정원(Seo Jung-Won),허현무(Hu Hun-Mu),이동형(Lee Dong-Hyeong),정흥채(Chung Heung-Chai) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Railway wheels and axles belong to the most critical components in railway vehicles. The service conditions of railway vehicles became more severe in recent years due to the increase of speed. Therefore, a more precise evaluation of wheelset life and safety has been requested. One of the major reasons of railway wheel damage is a contact zone failure by wheel/rail contact. In this paper, we conducted a rolling contact fatigue test for wheels using a specimen of wheel/rail. the behavior of hardeness and residual stress below the contact surface of the test pieces in the fatigue process were analyzed. Finally, the relation between fatigue life and contact pressure was obtained.
권성태(Kwon Sung-Tae),정종덕(Chung Jong-Duk),김원경(Kim Won-kyung),홍용기(Hong Yung-Ki),허현무(Hu Hun-Mu) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper describes the result of carbody and vibration test for freight car. The purpose of the test is to evaluate an safety which carbody structure shall be considered fully sufficient rigidity so as to load a freight car under maximum load and operating condition on line track. The test carbody is constructed by RS korea co., LTD. in accordance with KNR specfication. The test cases of the carbody is tested the vertical load and compressive load to verify the strength and stiffness. The vibration test is tested for analysis and evaluation of vibration, to allow for the fact that mechanical vibration in railway vehicles have specific characteristics.