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- 저자 : 김남포(Nampo Kim) (검색결과 3 건)
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틸팅판토그라프의 틸팅 메카니즘 및 가이드 트랙 형상 설계에 관한 연구
고태환(Ko Taehwan),김남포(Kim Nampo),한성호(Han Seung-Ho) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
The development of tilting train is required for speed-up on the conventional electric railroad due to the characteristic of Korean railroad with a lot of curve track. The study and development of a tilting system and a tilling bogie which have a different mechanism with high speed train will play a important role for enhancement of technology for Korean railway. The study for tilting pantograph mechanism to decrease the displacement between a catenary and a center of pantograph happened when the carbody is tilted in order to maintain the ride comfort and stability on a curving track is proceeding with the development of tilting train. In this paper, we introduce the design concept for the tilting mechanism of a tilting pantograph and the role and characteristics for several devices adopted in the tilting pantograph mechanism. Through the kinematic analysis of tilting mechanism, we will obtain and calculate the optimal tilting angular velocity and acceleration in order to keep the contact behavior of a pnatograph and a catenary according to tilting of a carbody.
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윤지원(Yoon Jiwon),김남포(Kim Nampo),김영국(Kim Youngguk),김석원(Kim Seog-Won),박태원(Park Taewon) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
The tilting train is able to tilt its body towards the center of the turning radius, preventing roll-over of the train as it runs on a curved rail at high-speed. This train, widely accepted for commercial purpose internationally is very beneficial in that the operating time is shortened without much capital investment to the infrastructure where there are many curved rails. Over several years, the Korea Railroad Research Institute(KRRI) has developed such a train. In this paper, the safety of the Korean tilting train express(TTX) is investigated using a dynamic simulation model. Since, proper safety standards have not been established for the TTX, those for the Korean train express(KTX) is employed instead to analyze the safety and ride comfort of the TTX. This study will prove useful in predicting the behavior of the TTX and ride comfort, and conforming that designed TTX measures up to the safety standards. It would be useful to recommend proper normal operating speed and determine the maximum safety speed, according to the result. Furthermore, it would be possible to provide basic reference data when analyzing the dynamic effect of the catenary system and the fatigue of the bogie.
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박준혁(Joonhyuk Park),고효인(Hyoin Koh),허현무(Hyunmoo Hur),유원희(Wonhee You),김남포(Nampo Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Unstable vibrations of railway vehicle wheels generate the curve squeal noise in tight curve. This squeal noise has to be reduced in order to increase the service quality of railway system by eliminating the main factors that make the wheel unstable. In this paper, main parameters which affect the stability of railway vehicle wheel are introduced and the stability analysis is carried out using those parameters in frequency domain. Time domain analysis is also performed. In the time domain analysis, using a conventional Korean subway vehicle model, transient time response of a wheel is analyzed when the vehicle is running in curved track. Finally, the results are compared and discussed.
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