• 자동차안전학회지
• /
• 제10권1호
• /
• pp.6-11
• /
• 2018

Recently, many drivers of two-wheeled motorcycles in leisure and express delivery industries etc. brought increasing issues for the motorcycle safety. This paper has studied the structural safety of two-wheeled motorcycles considering the regulations for stand, rear registration plate and anti-tampering measures. The authors have investigated and compared a variety of international and domestic regulations and specifications for structural safety of those components. Detailed experimental procedures of stand, mounting for rear registration plate and anti-tampering measures are proposed to secure the two-wheeled motorcycle safety and the outcomes of this study can be used to confirm the Korean motor vehicle safety standards.

• 한국안전학회지
• /
• 제18권4호
• /
• pp.148-154
• /
• 2003

There are now the plating process that have many hazardous factor cause of the using numerous noxious chemical and bad working environments. The purpose of the study is to make a selection of suitable safety evaluation method that can analyze and righteously find with numerous hazardous factor of the plating process. And another purpose is to systematically adjust the risk of plating process by comprehension of the role of process, equipment, and source material. Therefore, these studies are carried out in the following three investigations of this report. The first research understands the injurious human health and environment by analyzing hazardous material based on the MSDS. To evaluate the safety of process and compartment, the second research is proposed the security secure counterproposal by using the FMEA and the HAZOP. The final research is devoted to systematically analyze the hazard by applying for reasonable guide word and doing the HAZOP for hazardous factor in specific process.

• 한국안전학회지
• /
• 제31권3호
• /
• pp.162-167
• /
• 2016

As the simple empirical and phenomenological model applied to the analysis of leakage and explosion of chemical substances does not regard numerous variables, such as positional density of installations and equipment, turbulence, atmospheric conditions, obstacles, and wind effects, there is a significant gap between actual accident consequence and computation. Therefore, the risk management of a chemical plant based on such a computation surely has low reliability. Since a process plant is required to have outcomes more similar to the actual outcomes to secure highly reliable safety, this study was designed to apply the CFD (computational fluid dynamics) simulation technique to analyze a virtual prediction under numerous variables of leakages and explosions very similarly to reality, in order to review the computation technique of the practical safety distance at a process plant.

• 자동차안전학회지
• /
• 제11권1호
• /
• pp.17-22
• /
• 2019

Nowadays many two-wheeled motorcycles are used in leisure and express delivery industries. But studies of the electromagentic compatibility on motorcycles have seldom been performed and published. This paper has studied the electromagnetic safety of motorcycles considering international and domestic regulations and standards. Also, a series of experiments have been performed to evaluate the level of electromagnetic compatibility of commercially available motorcycles. As a result, detailed experimental procedures are proposed to secure the electromagnetic safety and can be used to confirm or revise the Korea Motor Vehicle Safety Standards.

• 대한임베디드공학회논문지
• /
• 제17권3호
• /
• pp.157-165
• /
• 2022

As the number of the installed escalators in Korea continues to increase, the accident rate is also increasing. Therefore, it would be necessary to proactively secure safety. PESSRAE is a controller that implements safety functions as electric/electronic/programmable electronic devices to respond to risks that may occur in escalators. Safety Integrity Level (SIL) is assigned to the safety functions of PESSRAE and it must be verified that the quantitative target value according to the SIL level is satisfied. In this paper, the initial PESSRAE is analyzed using the FMEDA (Failure Mode, Effects and Diagnostic Analysis), which is a quantitative safety analysis method, and design improvement specifications are derived from the analysis in order to satisfy the quantitative target values. Based on the derived design specifications, the improved PESSRAE controller was manufactured. And the appropriateness of the design was verified experimentally in a testbed environment simulating the real environment.

• 한국해양공학회지
• /
• 제32권1호
• /
• pp.21-27
• /
• 2018

The design and analysis of a quayside mooring system for safe mooring of Prelude FLNG under extreme environmental conditions were carried out. The design of the mooring system considered the yard operation conditions and maximum wind speed during a typhoon. In order to secure the mooring safety of Prelude FLNG under an extreme environment, a special steel structure was designed between the quay and Prelude FLNG to maintain the distance from the quay to a certain extent to avoid a collision with the inclined base. The mooring safety was also ensured by installing additional new parts on the quay. A mooring analysis and mooring safety review were performed with more rigorous modeling considering the nonlinearity of the mooring rope and fender. In order to secure additional safety of the mooring system under extreme environmental conditions, a safety assessment was conducted on the failures of the mooring components proposed in the marine mooring guidelines. Based on the results of the mooring analysis, it was confirmed that the Prelude FLNG can be safely moored even under the extreme conditions of typhoons, and a worst case scenario analysis verified that the mooring system design was robust enough. The proposed mooring analysis and design method will provide a basis for the safe mooring of ultra-large floating offshore structures of similar size in the future.

• 한국터널지하공간학회 논문집
• /
• 제23권6호
• /
• pp.577-587
• /
• 2021

격자형 지하공간 공법은 원지반의 강도를 최대한 활용하는 지하공간 굴착 공법이다. 격자형 지하공간의 안전성을 확보하기 위해서는 암주에 대한 안전성뿐만 아니라 실제 사용되는 공간(Room)에 대한 안전성 또한 확보되어야 하므로 암주와 동시에 공간(Room)에 대한 안정성이 평가되어야 하나, 이에 대한 연구는 미흡한 실정이다. 본 연구에서는 수치해석을 통해 격자형 지하공간의 룸(Room)과 암주 안전성에 대한 평가방안을 연구하였다. 지반조건, 암주 폭, 룸 폭을 매개변수로 한 총 125가지 경우의 수치해석을 수행하여 암주의 안전율은 지반의 강도가 증가할 경우 안전율이 증가하는 것을 확인하였고, 암주의 폭이 넓어질 경우는 안전율 증가 폭이 감소하는 것을 확인하였다. 룸 변형률은 한계변형률을 적용하여 평가하였으며, 암주의 폭이 좁아질수록 높게 나타나고, 룸의 폭이 좁아질수록 변형률이 작게 발생하였다. 암주 안전율과 룸 변형률에 대한 상관관계 분석 결과 암주 폭에 따라 암주의 기준 안전율 이상을 확보할 수 있는 룸 변형률의 상한값을 도출 할 수 있었다. 본 연구에서 도출된 결과는 지반조건, 룸 폭 등을 고려하여 실제 설계를 수행할 경우 룸의 안전성을 확보 할 수 있는 가이드라인으로 활용 될 수 있을 것으로 판단된다.

• 한국건축시공학회지
• /
• 제7권3호
• /
• pp.99-105
• /
• 2007

Current domestic safety training in building demolition works are heavily relies on the limited number of experienced people and thus, it implies the demand of preparing the systematic program and stricter yardstick is soaring. Questionnaire survey and in-depth interview results with demolition engineers were analyzed adopting AHP methodology. Analysis results reveal that the most urgent items which required improving current safety training system are to increase investment level, prepare more structured training system and secure experts, and so on. In addition, field labors and managers strongly requested the improvement of environment-related safety matters. Based on the evaluation results, guidelines were suggested for the improvement of safety training system in building demolition works.

• 한국안전학회지
• /
• 제34권5호
• /
• pp.63-71
• /
• 2019

Work Guideline of Construction Quality Management was revised in July 2017, and it has changed the perception of scaffolding in South Korea. The on site investigation and survey was performed on manufacturers, leasing companies, and quality inspection agencies regarding the compliance with the guideline for the scaffolding and the related components brought to the site. Moreover, the related guidelines and identified unsatisfactory quality management items were analyzed by each subject. As a result, the major factors that cause the problems were reasonably deducted. The related regulations to prohibit the delivery of faulty scaffolding components to the construction site in order to secure the safety of the temporary structure was suggested.

• 로봇학회논문지
• /
• 제17권4호
• /
• pp.477-483
• /
• 2022

In this paper, we propose waste collection vehicle system with a safety device for worker safety and an autonomous driving function. The steering system is applied as MDPS (Motor Drive Power Steering) system to control the waste collection vehicle of the internal combustion engine. Safety-related errors is prevented through redundancy brake of the integrated system and the control braking system. In order to ensure safety between workers and waste collection vehicles, work guidelines and safety devices for emergency stop in case of danger are applied to vehicles. In addition, this research is conducted on improving the working efficiency through vehicle condition monitoring system and a short-range control system for field test. This research is aimed to secure stability through demonstration and contribute to the industrialization of unmanned waste collection vehicles.