• Proceedings of the KIEE Conference
• /
• 2001.07b
• /
• pp.1233-1235
• /
• 2001

본 논문은 경량전철차량시스템의 출입문장치에 주어진 목표신뢰도를 바탕으로 출입문장치 구성품별 목표신뢰도를 정의하였으며 출입문 구성품의 목표신뢰도 배분은 출입문의 설계 및 유지보수과정에서 발견된 문제점을 분석하여 작성되었다. 또한 경량전철차량 출입문을 설계, 제작 및 유지보수에 필요한 지침을 마련하였다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2011.04a
• /
• pp.245-247
• /
• 2011

본 연구에서는 제연구역과 옥내와의 차압 및 출입문의 폐쇄력 측정을 통해 제연구역 출입문의 작동패턴을 해석하였다. 이를 통해 제연구역 출입문의 폐쇄력 측정시 정확한 측정을 위해 출입문을 완전히 폐쇄한 상태에서 측정을 하여야 하며, 문의 크기에 비례하여 증가하는 폐쇄력을 고려한 제연설비 설계에 대한 근거를 제시하였다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2011.11a
• /
• pp.294-297
• /
• 2011

본 연구는 11층 이상의 고층 건축물 화재 시 피난로를 확보하기 위해 급기가압 제연설비가 작동하게 되는데, 이로 인하여 제연구역에 양압이 형성되면서 출입문 개폐장애라는 문제점이 발생하여 오히려 피난로를 가로막는 장애요소가 될 수 있다. 따라서, 이러한 현실을 해결하기 위하여 출입문 해정장치를 개발하고 이를 장착한 출입문을 제안한다. 본 개발의 목표는 시스템적인 문제점으로 인하여 발생하는 제연구역의 과압에 대한 대책이며, 현행법에서 요구하고 있는 출입문 개방력 110N이라는 임계수치로 인하여 현저하게 신체능력이 낮은 노약자의 화재 시 출입문을 통한 대피 장애를 극복하기 위함이다. 본문에서는 해정장치의 기계적인 시스템적 구조를 단순하게 구성함으로써 작동상의 신뢰도가 높은 장치를 설계하며, 해정장치의 배치와 개구부의 크기 및 누설 틈새에 대한 설계를 제안한다.

• Journal of the Korean Society for Railway
• /
• v.16 no.2
• /
• pp.144-150
• /
• 2013

This paper presents an analysis of door design for the Ui LRT based on experiments to predict doorway flow-time and their analyses results. A similar railway vehicle (from Gimhae LRT) and operational conditions are utilized to assess the doorway flow-time through repetitive experiments. Design of the experiments consists of four scenarios, and the experiments are repeated 39 times in total. We use the results of the experiments to verify the design of doors of Ui LRT (e.g. the required number of doors and their width). Various statistical analyses are carried out for the flow-time with respect to the number of boarding/alighting passengers. We make three category levels of boarding/alighting passengers, and analyze the mean and variance for each category, and then carry out One-Way ANOVA to analyze how the number of boarding/alighting and onboard passengers impact flow-time. The results of this paper can be used for making decisions about doors of the LRT vehicle.

• Journal of Energy Engineering
• /
• v.24 no.1
• /
• pp.17-23
• /
• 2015

Electrical door system is one of the most essential items for the successful commercial operation of the railway vehicles. Nowadays, reliability values of electrical door system have a tendency to be included in technical requirements for design and manufacturing of rolling stocks. Manufacturer shall meet the reliability target values of electrical door system which is proposed by railway operator in procurement contract book. Railway operator shall approve the supplier's the reliability target values based on maintenance operation data. Railway operators are in the transition stage from the framework of maintenance interval based on time to the framework of maintenance interval based on distance. In this study, failure rates of the electrical door system currently used in railway vehicles are collected from maintenance field data. Failure rates are analyzed by using Minitab. Several kinds of plan for improving reliability are also suggested. It is necessary to keep studying on reliability prediction methodology, applying it in the field and implementing on improvement of reliability through feedback as well. Further, it will be useful for determining new maintenance policies or changing maintenance intervals for existing railway vehicles.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.6
• /
• pp.697-702
• /
• 2017

A preliminary study was carried out to investigate the feasibility of replacing honeycomb cores with pyramidal truss cores in the doors of urban transit railway vehicles. The doors in current operation are sandwich structures comprising a honeycomb core and reinforcements between two facesheets. The structural requirements of doors for urban transit vehicle are specified in the KRS and KRT and standards, according to which the deflections from three-point bending tests must be limited. To this end, two types of pyramidal truss cores with equivalent mass to a honeycomb core were designed. The structural stiffness of doors with pyramidal truss cores and honeycomb cores were numerically calculated via finite element analysis. The three-point bending models were constructed and simulated, and then the calculated deflections were compared with the requirements specified in the regulations. The results show that doors with pyramidal truss cores satisfied the stiffness requirements, although their deflections were 2.5% larger than that of the honeycomb cores. Therefore, the pyramidal truss cores could replace the aluminum honeycomb cores, and their multi-functional capability could be exploited.

• Journal of the Institute of Electronics Engineers of Korea SC
• /
• v.48 no.4
• /
• pp.47-53
• /
• 2011

The Electric Multiple Unit (EMU) has many types of door system such as sliding door, plug door etc.al. according to customer's requirements. The sliding door is widely used in Korea but has weak point in the noise problem. In the low operation speed, the noise coming from outer side of the EMU is not an important factor. As the speed is higher than before, noise is increased and make a problem. The main cause of noise is the imperfect air tightness in the EMU. The plug door system has advantages for the noise reduction characteristic in the high speed area. We have been developing electric plug-in door. The door is controlled by Door Control Unit(DCU) following the order of Automatic Train Protection (ATP) that is a kind of train signalling system. DCU has to simultaneously open and close the doors and the operation of it is related to the passengers safety. So DCU is a safety device that is important to reliability and safety. DCU is composed of several devices of control, motor driving, Input/Output, communication and power. In this paper, we will describe the functions, characteristic, requirement, subsystem and test results of DCU used for the electric plug-in door.

• Fire Science and Engineering
• /
• v.25 no.2
• /
• pp.132-137
• /
• 2011

A relationship between resisting moment and the structure of an automatic closure device is introduced for analyzing the effect of opening and closing condition on various fire door sizes in the pressurized room for smoke control system. The larger the size of fire door is, the more force is required for reaching to opening and closing conditions and there exists the design range of fire door in the pressurized room reflecting the closing time of fire door, rotative velocity, a relation between rotative angle and force and the efficiency of the automatic closure device.

• 방재와보험
• /
• s.110
• /
• pp.18-23
• /
• 2005

화재 시 연소확대 경로가 되는 엘레베이터 출입문의 층별 방화구획을 위한 우리나라의 기준과 선진 각국의 시험방법과 성능기준에 대해 고찰하는 한편, 방화성능 시험방법을 앞으로의 제도적 개선방안을 모색해보도록 하자.

• The Journal of the Korea Contents Association
• /
• v.12 no.7
• /
• pp.255-260
• /
• 2012

This study aims to examine the generation of scatter rays by dividing it into the presence of the subject at the chest X-ray examination, the X-ray tube and detector in the X-ray room, the front of the patient window, the outside of the entrance door of the patient waiting room, opening of the entrance door, the outside of the radiological technologist's entrance door, and the opening of the radiological technologist's entrance door, etc. When there is a subject, as the subject is thicker, more scatter rays occur at each of the spots for measurement. And when the entrance door is closed at the measurement, fewer scatter rays are generated.