• Journal of the Korean Society for Railway
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• v.12 no.6
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• pp.983-988
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• 2009

When the railway vehicle passing through curves & transitions, the running speed must improve by proposing the practical standard about maximum running possibility speed of each section on existing line considering running safety. In this paper, when the railway vehicle passing through curves of actual track conditions (Namsunghyun-Chungdo up & down lines), the effect that has influence on running safety is examined to devise the high speed of vehicle which passing through curves which risk of derailment is high. The running safety analysis is performed that running speed by curve radius improves 5-20% compared with existing speed under actual track conditions. In result of the running safety analysis, in case the speed condition is fewer than 15% compared with existing speed, the derailment coefficient and unloading ratio are within acceptable level. so we could confirm possibility of speed improvement on the whole Namsunghyun-Chungdo up & down lines.

• Journal of Navigation and Port Research
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• v.32 no.8
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• pp.583-588
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• 2008

The planing craft is designed specifically to achieve comparatively high speed on the surface of the water. In general, the stepped hull craft has effect improvement in speed and fuel-efficiency because of the reduction of total resistance by a small wetted surface area without corresponding stepped hull craft. In this paper, the high speed stepped hull crafts with respect to the number of bottom steps were performed to compare the effect of resistance performance using at-sea model-test method. In conclusion, the stepped hull craft with twin-step was proved to be effective to reduce the total resistance.

• Journal of Navigation and Port Research
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• v.36 no.3
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• pp.157-162
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• 2012

A planing craft is designed specifically to achieve comparatively high speed on the surface of the water. The frictional resistance of planing craft can be reduced further by injecting air to the craft's bottom. In this paper, the resistance characteristics of high speed planing crafts with & without air injection at the bottom were compared by sea model-test method. As a result, we conformed that planing craft with air injection has much greater the effect of resistance reduction.

• The Science & Technology
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• no.10 s.413
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• pp.6-7
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• 2003

국산 고속철 시속 300km 시험주행 성공/ 세계 초일류 기술 · 경영대학원 추진/ 한국 IT산업 OECD 28개국 중 6위/ 차세대 인프라 구축계획 발표/ '기술사'합격자 322명 발표/

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.987-988
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1575-1576
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• 2013

• Computational Structural Engineering
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• v.23 no.3
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• pp.75-79
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• 2010

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.1483-1484
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• 2010

• The Safety technology
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• no.145
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• pp.15-17
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• 2010

1969년 설립된 한국도로공사는 고속국도의 신설과 확장, 유지관리, 휴게 및 편의시설 설치 관리, 관련 업무에 대한 연구와 기술개발 업무를 담당하고 있다. 현재 우리나라 총 29개 고속도로 3,426km를 관리하고 있으며, 국민들이 언제나 안전하고 편안하게 고속도로를 주행할 수 있도록 24시간 최선의 노력을 다하고 있다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.06a
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• pp.979-980
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• 2008