• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.26 no.1D
• /
• pp.125-132
• /
• 2006

In the present study, in order to elucidate the vibration characteristics of track and train body according to the type of track in tunnel, the vibration accelerations of the track and the KTX train body have been measured in tunnels of Kyong-Bu high-speed railway(HSR) lines, and the frequency analysis of the measured data has been performed. From this, the vibration characteristics of the track components such as rail, sleeper, ballast and slab, the tunnel lining and the vehicle body according to the type of track are investigated and their relation is analyzed. The test results show that the vibration of rail and vehicle body rapidly increases at 80Hz in tunnel, and that is much higher in the tunnel on which the concrete slab track is placed. According to the results of the present study, rail supporting stiffness can variate the vibration characteristics of the total system including the vehicle, and therefore the correlation between the vibration of vehicle should be taken into account to determine the supporting stiffness of the slab track.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2012.10a
• /
• pp.161-162
• /
• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2013.05a
• /
• pp.181-182
• /
• 2013

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2008.06a
• /
• pp.103-104
• /
• 2008

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2010.05a
• /
• pp.136-137
• /
• 2010

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2010.05a
• /
• pp.284-285
• /
• 2010

• Venture DIGEST
• /
• s.58
• /
• pp.10-11
• /
• 2004

금융은 해를 따라 움직인다는 말이 있다. 국가간의 시차로 인해 결제시간의 공백이 생기기 때문에 나온 말이다. 외환동시결제시스템 ‘CLS’를 구축하며 이 말을 정면으로 거스르는 기업이 있으니 바로 금융솔루션 전문기업 코마스이다. 1993년 SWIFT의 한국 비즈니스 파트너로서 첫발을 내딛고, 이후 12년 간 금융솔루션분야에 주력해온 코마스. 그 해가 지지 않는 쟁기질 소리를 들어보자.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2011.06a
• /
• pp.1459-1460
• /
• 2011

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2010.11a
• /
• pp.443-444
• /
• 2010

• Journal of Advanced Marine Engineering and Technology
• /
• v.35 no.6
• /
• pp.786-795
• /
• 2011

This paper described the characteristic of vibration in wind turbine system including gearbox housing, gear drive, blade, generator. Especially, in planetary gear set, planet gears are supported by flexible pin. So, in planet gear, to consider not only torsional movement but also lateral movement. And include housing movement, because wind turbine system is supported by mount. To find out the characteristic of vibration, take the excitation source and study campbell diagram in operating range. Results of campbell diagram, resonances are occurred at 81.2HZ, 104.7Hz by 2nd tooth passing frequency. And resonance are also occurred at 264.5HZ, 377Hz, 424.6Hz by 3th tooth passing frequency. From the result, take vibration reduced measures.