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허신(S. Hur),경진호(J.H.Kyung),H.S.Han,송달호(D.H.Song),박성훈(S.H.Park),김정수(J.S.Kim) 한국철도학회 1999 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, we developed the simulation program of an overhead catenary-pantograph system. The overhead catenary is modeled with point mass and the pantograph is replaced wi th 3 d.o.f model which is composed of mass, spring and damper. Using the developed program, we analyzed the static structure of the overhead catenary and the dynamic characteristics of an overhead catenary-pantograph system such as uplift displacement of contact wire and contact force. we compared the analysis resul ts wi th the results of GASENDO software developed at RTRI in Japan. The behaviors of uplift displacement of contact wire and contact force were similar with the results of GASENDO software.
허신,경진호,송달호,김정수,조용현,Hur, S.,Kyung, J.H.,Song, D.H.,Kim, J.S.,Cho, Y.H. 한국철도학회 2002 한국철도학회논문집 Vol.5 No.1
In this study, we have developed the static and dynamic simulation program of a high speed current collection system. The catenary wire is modeled to discrete masses connected by massless strings and the pantograph is replaced with 3 d.o.f equivalent models that are composed of masses, springs and dampers. We derived partial differential equations of motion from the equivalent model and developed the simulation program. Then, we calculated the static equilibrium state of the overhead catenary and the dynamic behaviors of the high speed current collection system. The analysis results were compared with the results of GASENDO software developed at RTRI in Japan.
허신(S. Hur),경진호(J. H. Kyung),송달호(D. H. Song),김정수(J. S. Kim),조용현(Y. H. Cho) 한국철도학회 2002 철도저널 Vol.5 No.1
In this study, we have developed the static and dynamic simulation program of a high speed current collection system. The catenary wire is modeled to discrete masses connected by massless strings and the pantograph is replaced with 3 d.o.f equivalent models that are composed of masses, springs and dampers. We derived partial differential equations of motion from the equivalent model and developed the simulation program. Then, we calculated the static equilibrium state of the overhead catenary and the dynamic behaviors of the high speed current collection system. The analysis results were compared with the results of GASENDO software developed at RTRI in Japan.
박성훈(S.H. Park),김정수(J.S. Kim),허신(S. Hur),경진호(J.H. Kyung),송달호(D.H. Song) 한국철도학회 1999 한국철도학회 학술발표대회논문집 Vol.- No.-
Dynamic characteristics of pantograph-catenary system that supplies electrical power to high-speed trains are investigated. A simple catenary is composed of the contact and messenger wires connected by hamgers possessing bi-directional stiffness properties. The influences of parameters that determine the contact properties of pantograph - catenary system are investigated through numerical simulations. For the catenary, a finite difference model composed of 10 spans is constructed. The contact and messenger wires are modeled as strings with respective tension and damping ratio values. The pantograph is modeled as a linear 3-degree-of-freedom system. It is found that the tension, number of hangers and damping ratios as well as the speed of the train significantly influence the contact forces and contact separation rate.
구정서(J. S. Koo),송달호(D. H. Song) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
A study on collision analysis of TGV-K using a 2-dimensional model is described to evaluate its crashworthiness. Two-dimensional analysis gives good information on overriding behaviour and impact forces applied to interconnecting devices such as side buffers, ball &socket joints, hooks, pins, and fingers. Since the headstock of TGV-K is not designed in a crashworthy point of view, its conceptual design for KHST(Korean High Speed Train), under development, is suggested to improve crashworthiness. The suggested design, which adopts an energy absorber and a crashworthy headstock, is compared with the conventional headstock on dynamic behaviour to the vertical direction under the accident scenario of SNCF (collision at 110 ㎞/h against a movable rigid mass of 15 ton). It is concluded that the design modification make little difference in vertical motion. To evaluate validation of the 2-dimensional model, the results for longitudinal motion is compared with those of 1-dimemsional one. It is found that the two results are in good agreements.
고속전철 TGV-K 전체 차량에 대한 충돌안전도 해석 연구
구정서(J. S. Koo),송달호(D. H. Song) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
Described in this paper is the result of a study on collision analysis of TGV-K using I-dimensional model for crashworthy design. Crashworthy design of the front end is very important because majority of the impact energy (more than 70%) is absorbed by the crush of the front end when the train is collided with an obstacle like a tank lorry, Guideline for the crashworthy design can be described from the collision analysis of the whole train using a 1-dimensional model. Since the headstock of TGV-K is not designed in a crashworthy point of view, a conceptual design of the headstock to improve crashworthiness is suggested and evaluated using 1-dimensional collision analysis. The suggested design, which adopts an energy absorber and a crashworthy headstock, shows a good behaviour on the accident scenario of SNCF (collision at 110 ㎞/hr against a movable rigid mass of 15 ton).
속도 향상을 위한 고속전철 TGV-K 집전시스템의 성능에 관한 연구
허신(S. Hur),경진호(J. H. Kyung),한형석(H. S. Han),송달호(D. H. Song) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
Described in this paper are the dynamic model and the dynamic performance of catenary-pantograph system for TGV-K(maximum operating speed of 300㎞/hr). Dynamic simulations showed that the system satisfies the performance criteria such as contact loss ratio, contact force and lift-off of the contact wire. It is also shown by the simulations that the dynamic behavior and contact performance of the system at the operating speed of 350 ㎞/hr are found unacceptable. Design parameters of the catenary-pantograph system should be optimized for the speed-up of the TGV-K.