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차세대 분산형 고속열차의 후미진동 저감에 관한 연구
- Alternative Title
- Chang Sung Jeon
- Author(s)
- 전창성
- Alternative Author(s)
- Chang Sung Jeon
- Advisor
- 박태원
- Department
- 일반대학원 기계공학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2015-02
- Language
- kor
- Keyword
- 동역학
- Alternative Abstract
- The dynamic behavior of HEMU-430X, the Korean next -generat ion high-speed train, was invest igated through numerical analysis and an on -t rack test . Before the on-t rack test , VAMPIRE analysis resul ts showed that HEMU-430X was expected to sway st rongly at the tai l end because of the yaw damper posi t ion. Some countermeasures such as changing the wheel profi le, damping coeff icient of the 2nd lateral damper, and damping coeff icient of the yaw damper were taken into account to solve this problem. By changing the yaw damper posi ton, the hunt ing mot ion was expected to disappear effect ively. In the on -track test , the dynamic behavior of HEMU-430X was assessed according to the EN 14363 standard by measuring the carbody, bogie, and axle accelerat ions, and i t sat isf ied the safety cri teria. From the viewpoint of the running characterist ics, the RMS value of the carbody lateral accelerat ion occasional ly exceeded the cri teria; however, this was related to the ride qual i ty and not the safety assessment . Thehunt ing mot ion appeared at speeds of 150, 350, and 387 km/h, and countermeasures such as the changing the yaw damper posi t ion, instal l ing carbody to carbody dampers, and increasing the damping coeff icient of th e MC car yaw damper, respect ively, were taken to reduce these vibrat ions; then, a highest test speed of 421.4 km/h was achieved. Subsequent ly, the cr i t ical speed tended to decrease wi th mi leage; this was at t ributed to carbody hunt ing. To suppress this carbody hunt ing, the relat ion between the cri t ical speed and the yaw damper proper ty was invest igated in detai l . Carbody hunt ing was at t ributed to excessive lateral damping ar ising f rom improper design of the yaw damper instal l angle. To solve this problem, the removal of some yaw dampers was examined in an on-track test and found to be somewhat effect ive. The revised design was proposed based on numer ical analysis, and i t wi l l be verified in an on-track test . Final ly, the parameters of suspension were opt imize d to improve cri t ical speed.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Mechanical Engineering > 4. Theses(Ph.D)
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