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CCD카메라와 수위계를 조합한 철도교량 실시간 홍수위 감시시스템 개발
박영곤(Park Young Kon),윤희택(Yoon Hee Taek),김선종(Kim Seon Jong),신민호(Shin Min Ho),정승용(Jung Seung Yong) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
In these days, as it frequently happens that water level in the river exceeds the design floods due to irregular heavy rainfall, so it is required, first of all, to manage with railroad bridge safely. Because train control criterion under heavy rainfall is still not prepared and automatic flood monitoring system for railroad bridges is not used, worry over invisible economic loss due to train passage delay is in existence. Therefore, it is important to secure the safety and detect the risk like turnover or failure of railroad bridges through systematic disaster prevention system. And the transition from conventional monitoring method to realtime monitoring method supported by sensors and communication system with high technology is rapidly needed. This research is on developing the realtime flood monitoring system which prevents railroad disasters in advance by detecting continuously the water level of railroad bridge through CCD camera and water level gauge.
전단변형을 받는 비대칭 박벽 보-기둥 요소의 엄밀한 동적강도행렬
윤희택(Yoon Hee-Taek),박영곤(Park Young-Kon),김용기(Kim Yong-Ki) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
Derivation procedures of exact dynamic stiffness matrices of thin-walled curved beams subjected to axial forces are rigorously presented for the spatial free vibration analysis. An exact dynamic stiffness matrix is established from governing equations for a uniform curved beam element with nonsymmetric thin-walled cross section. Firstly this numerical technique is accomplished via a generalized linear eigenvalue problem by introducing 14 displacement parameters and a system of linear algebraic equations with complex matrices. Thus, displacement functions of dispalcement parameters are exactly derived and finally exact stiffness matrices are determined using element force-displacement relationships. The natural frequencies of the nonsymmetric thin-walled curved beam are evaluated and compared with analytical solutions or results by ABAQUS"s shell elements in order to demonstrate the validity of this study.
바이모달트램 운행을 위한 운영기반시스템 개발에 관한 연구
윤희택(Yoon Hee-Taek),박영곤(Park Young-Kon),변윤섭(Byun Yun-Sup),이강원(Lee Kang-Won),홍용기(Hong Yong-Ki) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
Bimodal tram is being developed to be completed in 2010 and the infrastructure needs to be developed to make the operation in time. Through the study of infrastructure reflecting domestic condition, dedicated lane, station, connection center, automated operation, precise docking, ticketing system, information system, management system for operation and maintenance, and refueling station will be developed and their performances will be also verified through the construction of test bed. The economical, safe and environment-friendly operation of the bimodal tram will be established through the present study.