• Plant Journal
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• v.13 no.3
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• pp.30-35
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• 2017

Module can be categorized as PAS(Pre-Assembled Steel structure), PAR(Pre-Assembled pipe Rack), PAU(Pre-Assembled Unit), VAU(Vendor Assembled Unit) and VPU(Vendor Package Unit). At the stage of design and fabrication of module, the condition of land and ocean transportation is considered and these conditions are reflected on the module division design. The control of the module's center of gravity is important to transport and install modules safely and the steel structure should have the strength enough to resist the sea acceleration force during the ocean transportation. The transportation condition and the installation method influence the size and weight of module. The size and weight of module are considered for the design of module division.

• 전기의세계
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• v.44 no.9
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• pp.38-42
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• 1995

최근 산업 발달과 더불어 증가하는 운송 물량과 일일 생활권의 확대 및 생활 수준의 향상으로 인해, 빠르고 편리하며 안전한 양질의 운송수단에 대한 요구가 점차 높아지고 있다. 이러한 요구의 증대는 자동차와 같은 개별적 운송수단의 증대를 유발하였으며, 기존의 제한된 도로에 대한 운송수단의 점유율을 증가시켰다. 그 결과, 운송소요시간이 불규칙해져 평균수송량이 감소했으며 이로 인해 운송효율이 급격히 저하되었다. 따라서 많은 양의 물량을 한 번에 수송할 수 있으며, 정확한 운송시간을 보장하는 철도차량과 같은 운송수단의 확대가 절실하게 되었다. 도심 내에서는 전기 철도차량인 지하철을 설치하여 점증하는 수요를 충족시켜 왔으며, 도심간에는 기존의 궤도를 이용하는 차량의 운송횟수를 늘려 운송량을 증가시켜 왔다. 그러나 최근, 계속된 수요의 증가로 인해 기존 방식의 철도차량 운송 능력도 포화상태에 이르게 되었다. 이에 따라 기존의 제한된 선로에서 운송량을 향상시키기 위한 연구와 함께 새로운 철도노선 확장 및 차량의 고속화를 위한 연구가 활발히 진행되고 있다.

• Computational Structural Engineering
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• v.12 no.3
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• pp.42-49
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• 1999

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.18 no.6
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• pp.76-95
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• 2019

An on-board truck scale is an essential technical solution for preventing overload, which makes the driver aware of the commercial vehicle weight. This study analyzed the effects of the driving pattern and transportation efficiency by the IoT Platform service for an on-board truck scale. A comparison of before and after installation using the long-term monitored data confirmed the reduction effects both of the overload ratio and overweight value, and their effects on increasing the transportation efficiency. In addition, the analysis result of the driving route showed that the installation of an on-board truck scale could be a more effective way of preventing overload than increasing the weighing checkpoints.

• Journal of the Korean Institute of Gas
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• v.21 no.3
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• pp.46-52
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• 2017

During the transportation of chemicals, quantitative risk assessment for chemical leakage accidents caused by traffic accidents was carried out and the appropriateness of chemical transportation route was evaluated. The quantitative risk assessment method applied to the chemical leakage accidents that may occur in the chemical handling equipments installed in the workplace was presented and applied to the chemical transportation. By analyzing the number of traffic accidents in transportation vehicles, the probability of chemical leakage accidents during chemical transportation was predicted and applied to the quantitative risk assessment of chlorine gas leakage accidents that may occur when transporting liquified chlorine bombe using vehicles. As a result, the most appropriate route of transporting the liquefied chlorine bombe was suggested on the basis of risk.

• Bulletin of the Society of Naval Architects of Korea
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• v.57 no.2
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• pp.6-7
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• 2020

• Journal of Ocean Engineering and Technology
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• v.4 no.2
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• pp.48-58
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• 1990

본 논문은 해양구조물 중 특히 자켓이 부선에 설치되어 운송되는 시스템에 대한 개선된 해상 운송 해석에 대한 고찰이다. 해석 방법의 개선은 파력에 의해 발생되는 부선 운동에 따른 관성력의 추계적 처리에 기본을 두어 얻어지고 있다. 이 방법은 소위 말하는 강체 부선 방법과 연체 부선 방법의 중간적이라고 할 수 있으며, 두가지 방법의 단점을 보완하였다. 전형적인 자켓-부선 시스템에 대하여 유한요소법을 이용하여 모델링한 후 본 해석 방법을 적용하여 해상운송 해석을 수행하였으며, 자켓-부선간 반력을 구하여 기존의 방법과 비교 검토하였다. 본 방법은 현실적이고 효과적임이 증명되었다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.98-100
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• 2011

울산항은 입출항 선박의 항행안전을 위해 1996년 9월부터 해상교통관제실(VTS)을 설치운영하고 있으나 많은 물동량으로 빈번한 선박통항과 액화가스, 케미컬 등의 위험화물운송선박의 통항 등의 여러 가지 위험요소가 상존하고 있는 개항장이다. 특히 현대 미포조선소와 인근에 산재해 있는 중소 조선소 등에서 발생되고 있는 선박 조립용 블록을 운송하는 예 부선들의 빈번한 운항은 울산항의 안전한 물류유통에 많은 어려움을 야기하고 있는 실정이다. 한편 울산항 해상교통관제실에서는 레이더사이트의 운항선박에 대한 데이터, PORT-MIS의 선박관련 데이터 및 최근 선박자동식별장치(AIS)의 데이터 등 많은 정보들에 의해 운항 선박들의 항행 안전을 도모하고 있다. 따라서 본 연구에서는 선박 조립용 블록을 주로 운송하는 울산항의 (주)보성해상개발에서 TRS를 이용한 자체 운항관리실을 운용하여 운송효율과 안전운항을 노력하고 있는 상황과 그 결과 울산항 해상교통관제에 미치는 효과에 대해 분석하여 그 효율성을 나타내었다.

• Journal of Korean Society of Transportation
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• v.36 no.1
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• pp.13-22
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• 2018

Buses, one of the representative public transportation modes, are divided into a vareity of service types according to the purpose of operation, operating distance, and management agencies. Although bus-involved crashes may cause large amount of damage due to the higher number of passengers boarded on a bus, prior research has little focused on crash severity according to bus service types. This study aims to investigate factors influencing crash severity in bus-involved crashes and to present policy implications to reduce crash severity by bus service type. To do this, bus-involved crash data from the Traffic Accident Analysis System (TAAS) during five-year period are used. Ordered probit models for three types of bus service, i.e., city bus, suburban and express buses, and charter buses, are estimated to analyze the factors of accident severity. The results show that there are significant differences of factors affecting crash severity among the types of bus services while speed and road surface influence all the types of buses. In case of local buses, time of day, roadway alignment, and installation of a traffic signal are found to be statistically significant factors. Seat belt and road class have significant effects on injury severity of the intercity and express buses. Chartered buses have time of day, driving experience, seatbelt, traffic signal, and day of week as the significant factors. The results of this study are expected to contribute to the reduction of the crash severity by each bus service type.

• Journal of Wind Energy
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• v.15 no.1
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• pp.11-20
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• 2024

As the generation capacity of floating offshore wind turbines increases, the wind load applied to each turbine increases. Due to such a high wind load, the capacity of transport equipment (such as tugboats or cranes) required in the transportation and installation phases must be much larger than that of previous small-capacity wind power generation systems. However, for such an important wind load prediction method, the simple formula proposed by the classification society is generally used, and prediction through wind tunnel tests or Computational Fluid Dynamics (CFD) is rarely used, especially for a concept or initial design stages. In this study, the wind load of a 10 MW class floating offshore wind turbine was predicted by a simplified formula and compared with results of wind tunnel tests. In addition, the wind load coefficients at each stage of fabrication, transportation, and installation are presented so that it can be used during a concept or initial design stages for similar floating offshore wind turbines.