• Proceedings of the Korean Society for Language and Information Conference
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• 2002.02a
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• pp.465-474
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• 2002

Korean government has adopted the French TGV as a high-speed transportation system and the first service is scheduled at the end of 2003. TGV-relevant documents are consisted of huge volumes, of which over than 76% has been translated in English. A large part of the English version is, however, incomprehensible without referring to the original French version. The goal of this paper is to demonstrate how DiET 2.5, a lexicon builder, makes it possible to build with ease domain-specific terminology lexicon that may contain multimedia and multilingual data with multi-layered logical information. We believe our wok shows an important step in enlarging the language scope and the development of electronic lexica, and in providing the flexibility of defining any type of the DTD and the interconnectivity among collaborators. As an application of DiET 2.5, we would like to build a TGV-relevant lexicon in the near future.

• Proceedings of the Korea Society of Design Studies Conference
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• 2000.11a
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• pp.84-85
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• 2000

G7 고속전철개발 산업에서 계획된 부속실은 경부 고속전철(K-TGV)의 부속실을 그대로 사용하는 것으로서 좁은 통로와 획일적 공간, 불필요한 공간에 의한 승객 편의시설의 결여되었기에, 이의 수정보완이 요구되었다. 아래의 사진들은 K-TGV의 부속실 모습이다. (중략)

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.1A
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• pp.95-104
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• 2008

Dynamic behaviors of the two-span continuous bridge which is one of prototypes on Gyoung-Bu high-speed railway are analyzed and some methods for reducing the resonance of the bridge are proposed. The bridge is modeled as a two-span continuous beam and the load is a vehicle of TGV-K (2p+18T) with length of 380.15 meter traveling on the railway bridge at some constant velocity. The equations governing the dynamic behaviors of the bridge are partial differential equations produced by using a system with distributed mass and elasticity. The analysis of the governing equations is performed by the mode superposition method which has modal coordinates solved by Duhamel's integral. Without considering the train velocity the dynamic reponses can be greatly reduced at some special lengths of bridge. It is different from the results of simple bridges researched so far. When the dynamic responses increase rapidly to make a resonance phenomenon depending on the train velocities, the several methods are proposed to deduce the resonance.

• Proceedings of the KSR Conference
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• 1998.11a
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• pp.522-529
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• 1998

In this study, system analysis for a train vehicle with an articulated bogie frame adopted in TGV and TGV-K system is performed. System analysis is carried out as follows. First, modal analysis of each subsystem is performed to obtain the natural frequencies and mode shapes. Then modal analysis, of a whole vehicle is performed to obtain the potential interaction between the subsystems. Finallyforced response analysis, such as driving point mobility, is performed to obtain the dynamic response of specific points.

• Proceedings of the KSR Conference
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• 1999.11a
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• pp.526-533
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• 1999

Tn this study, the crashworthy design of the full rake of KHST (Korean High Speed Train under development in G7-project) is numerically evaluated using 2-dimensional crash dynamics. The results of KHST are compared with those of TGV-K (TGV for Seoul-Pusan line). KHST shows better crashworthy behaviors after impact. Specifically, impact forces, decelerations and overriding displacements are much reduced in KHST All the design guidelines under SNCF accident scenario (collision against a movable rigid mass of 15 ton at 110 km/h) are satisfied in KHST.

• Journal of Sensor Science and Technology
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• v.29 no.5
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• pp.354-359
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• 2020

The high vacuum hermetic sealing technique ensures excellent performance of MEMS resonators. For the high vacuum hermetic sealing, the customization of anodic bonding equipment was conducted for the glass/Si/glass triple-stack anodic bonding process. Figure 1 presents the schematic of the MEMS resonator with triple-stack high-vacuum anodic bonding. The anodic bonding process for vacuum sealing was performed with the chamber pressure lower than 5 × 10^-6 mbar, the piston pressure of 5 kN, and the applied voltage was 1 kV. The process temperature during anodic bonding was 400 ℃. To maintain the vacuum condition of the glass cavity, a getter material, such as a titanium thin film, was deposited. The getter materials was active at the 400 ℃ during the anodic bonding process. To read out the electrical signals from the Si resonator, a vertical feed-through was applied by using through glass via (TGV) which is formed by sandblasting technique of cap glass wafer. The aluminum electrodes was conformally deposited on the via-hole structure of cap glass. The TGV process provides reliable electrical interconnection between Si resonator and aluminum electrodes on the cap glass without leakage or electrical disconnection through the TGV. The fabricated MEMS resonator with proposed vacuum packaging using three-layer anodic bonding process has resonance frequency and quality factor of about 16 kHz and more than 40,000, respectively.

• Proceedings of the KSR Conference
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• 1999.05a
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• pp.176-184
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• 1999

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

• Proceedings of the KSR Conference
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• 1999.05a
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• pp.275-282
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• 1999

This paper presents the current-fed inverter of a TGV-K traction system with thyristor switches using phase control and commutation techniques. The current-fed inverters have two modes of operation which consist of forced commutation and natural commutation. In forced commutation mode, at speed of less than 120km/h, commutation is forced by means of the commutation capacitors and the thyristors. Above 120km/h, the thyristors operate in natural commutation mode, according to the voltages between phases of the motors. In this paper, the power conversion theory of the TGV-K traction system and the control principle of the converter and current-fed inverter are discussed.

• Journal of the Earthquake Engineering Society of Korea
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• v.4 no.4
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• pp.117-123
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• 2000

열차와 교량의 3차원 모델링을 사용한 고속철도 교량의 동적해석이 수행되었다. 철도교의 모델인은 판요소와 3차원 뼈대요소로 모델링되었다. 상판과 주형 사이의 offset은 기하학적인 구속조건을 사용하여 고려하였다. 본 연구에서 사용된 고속철도는 2량의 동력차와 2량의 모터차와 16량의 객차로 구성되어 있다. 관절형 대차로 연결되어 전체 열차계의 운동방정식은 Lagrange 방정식을 이용하여 유도되었으며, 차제와 대차 그리고 자축의 3차원인 운동을 고려하였다. 이동 열차에 의한 교량의 응답은 predictor-corrector 반복법에 의한 Newmark-$\beta$ 법에 의해서 그 해가 구해진다. 매개변수해석에 의해서 열차의 이상화방법, 열차의 제동, 철도교량의 주행면 조도에 의한 영향이 고찰되었다.

• Proceedings of the KSR Conference
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• 1998.11a
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• pp.379-387
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• 1998

HVAC systems are used to maintain comfort conditions in occupied spaces. Like rolling noise and aerodynamic noise, noise from the HVAC system of train increases interior noise level. For an appropriate interior noise level, it is necessary not to find noise sources and their propagation paths. Noise emission from the sources and propagation through the propagation paths should be regulated in order to reduce their effect to the interior noise level. In general, the main noise source in the HVAC system is blower which operates at high static pressure. This noise propagates through ducts which are directly connected to the residential area. Since the blower noise can be reduced only to some degree, it is necessary for the propagation paths to have enough noise attenuation. Acoustic properties of ducts are usually found by experimental methods but it is rather difficult and expensive to set up such test equipments. In this thesis, the design and the noise characteristics of TGV-K HVAC system are studied. Finite element method in accordance with experimental method is used to study the acoustic properties of TGV-K duct system.