• Proceedings of the Safety Management and Science Conference
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• 2005.11a
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• pp.30-39
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• 2005

Line capacity calculation has been used to determine optimum efficiency and safe train service for train scheduling plan and investment priority order throughout detecting bottleneck section. Because of some problems of Yamagisi and UIC methods for line capacity calculation, developing of the method of line capacity calculation and evaluation for the Korea circumstance is important. This paper deals with the integrated system of TPS(Train Performance Simulator), PES(Parameter Evaluation Simulator), LCS (Line Capacity Simulator) and sensitivity analysis for line capacity calculation model.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.159-160
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• 2008

기존 열자 승차감은, 주행중인 철도차량에서 승객이 느끼는 진동에 대하여 쾌적함의 정도라고 정의할 수 있으며, 기존 열차 승차감 기준으로는 ISO규격, Wz 평가법, UIC규격, KS규격 등이 있다. 기존의 열차 승차감 기준은 진동, 속도, 노이즈 등 기계적 요소만을 고려하므로, 승객이 느끼는 쾌적함을 평가하기에 한계가 있으며, 특히 곡선부 승차감을 평가하지 못하는 문제점이 잇으므로, 틸팅열차의 승차감을 평가하는데 어려움이 있다. 생체 신호를 기반으로 한 열차 승차감은, 기계적 요소들이 승객에게 미치는 영향이 심박, 혈압, 체온 등의 변화로 나타나므로, 이러한 생체 파라미터를 이용하여 열차 승차감을 평가하는 것이다. 특히 틸팅열차의 곡선부운행에 따른 틸팅 정도에 따라 발생하는 승차감의 변화를 측정하는데 적합하다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.10a
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• pp.593-594
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• 2006

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.293-298
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• 2001

2span continuous Prestressed concrete girder railway bridges, span length 21m, 25m, 30m, 35m, that down-up method is applied and that designed to satisfy service load in accordance with design criteria of railway bridge can be dropped in their hight compared with existing simply supported prestressed concrete girder railway bridges. Continuous bridges result in guaranteeing safety against bending behavior by loading the practical railway moving load with each velocity. But the natural frequency of span length 21m is estimated not to satisfy recommended limitation of UIC 776-1R..

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.304-309
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• 2001

Natural frequencies are studied for dynamic analysis of plate girder bridges which are made up about 34% in the existing railway bridges in Korea. In this study, standard plate girder bridges designed by L-22, a standard load type of the railway specification in Korea, are modeled for finite element method analysis. SAP2000n, a commercial finite element method analysis tool, is used for structural analyses and evaluations. Span lengths of Plate girders have 7 types : 6m, 9m, 12m, 15m, 22m, 24m, and 30m. Natural frequencies are considered in mass rations and span lengths and they are compared with a recommendation of UIC 776-1R for alterations, from now on, in train conditions of operation. For changes of natural frequencies in plate girders by damages of structures, Parameter studies are accomplished.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.640-645
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• 2005

Safety requirment or guidance have been developing for a long time in the UIC, Germany, France, and Japan etc. Also, In Korea, the Ministry Construction & Transportation make an progress about this issue, document, called 'railroad tunnel safety standards 6th draft', was developed. In this paper, we'll show standard of other country and compare with Korea draft. next, we'll show some kind of railroad safety facility and installations and explain a relationship of safety issue and standards

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.430-437
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• 2007

The experiments for aerodynamic characteristics on railway acoustic screen are performed using 1/61 scale-down mock-up facility. The train model for the experiment is high speed train (KTX) and the tested speed is about 300km/h. The tested train length is about 61cm which is corresponding to two units of train. The strength of pressure wave is measured using piezo typed pressure sensor. The measured pressure is compared with field test data and UIC 779-1 values.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.686-691
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• 2007

The ride comfort is more important according to train speedup. Generally it is defined as the vehicle vibration. There are many studies on evaluation method of ride comfort for railway. In the case of Korean high speed train(HSR 350x), the ride comfort has been assessed by statistical method according to UIC 513R. To verify the design requirements for the performance of HSR 350x, the qualification tests had been conducted from August 19, 2002 to December 2004 and the stabilization and reliability tests are carried out nowadays. Up to December 2006, total test runs and the accumulated milage of the train were 357 times and 164,000km, respectively. A total of 352 ride indices had been acquired through the on-line test from Aug. 2002 to Dec. 2006. In this paper, we have reviewed the characteristics of ride comfort for HSR 350x according to the operational conditions, such as load and track conditions, season and used time, by using the tests data.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.1768-1773
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• 2010

CEN/TS 45545 is Europe consolidation standard for fire safety on railway behicles. This is based on the International Union of Railways(UIC) and different European countries. It is intended to protect passengers and staff in railway in the event of a fire on board. It will be prepared in 2012. Based on this consolidate standard, they are going to make single market, for raising technical competitiveness, technical innovation and globalization of that standard. For this reason, European academies, manufacturers, and sub-manufacturers confer and stady animated about CEN/TS 45545. In Korea, get out the safety assessment for ues incombustible interior material, the needs of quantitative analysis on fire protection, demand on recognition of fire protection scenario, and define about fire load analysis are becomin more and more important. Therefore, this paper will estimate and compare Flammability, Smoke Density, Toxicity Index( this is the key point for appraised fire safety performance of material) between CEN/TS45545 and fire standards on railway vehicle. Then suggest criteria for fire safety on railway vehicles.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.1460-1465
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• 2007

CWR(Continuous Welded Rail) and bridge interaction produce rail force, bridge displacement and rail/bridge relative displacement. Each of these has limitation by many codes. In this paper, analysis of interaction has been carried out by using foreign codes(UIC 774-3 R code of Europe etc.) because there is no code about interaction between rail and bridge in Korea. Recently, railway bridges with CWR has been constructed for structural and economical reasons. When designer plans railway bridges, design a bridge model first and then investigate railway forces and displacement by interaction analysis. If these results go out bounds from limitation, designer plans railway bridges again and again. In this paper, using the parametric study on CWR and railway bridge interaction, railway bridge parameters such as length of bridge span, area of bridge, moment of inertia, stiffness of pier, etc. are presented. It helps preliminary design of railway bridges.