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정우진(W. J. Chung),오일근(I. G. O),허만선(M. S. Huh),김성원(S. Kim),서정희(J. H. Seo),조광수(K. S. Jo) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
The critical speed of a train running on the straight railway track is investigated by in-house program. The program is developed to find out nonlinear critical speed and it bases on the bifurcation theory. As a result, it is found that nonlinear critical speed exists on the lower speed band than linear critical speed and this fact imply a possibility of induction of a big accident.