• Proceedings of the KAIS Fall Conference
• /
• 2005.05a
• /
• pp.48-50
• /
• 2005

본 연구에서는 차량 충돌 시험시 결과에 관하여 측정하는 방법 중 인체 상해 기준에 따른 평가를 지원해주기 위한 시스템에 관한 것이다. 차량 충돌시험의 가장 큰 분류인 정면 충돌과 측면충돌 2가지에 대찬 내용을 기준으로 인체 모형 각 부분의 결과 값에 따른 기준과 계산 방법 및 법규 규정을 제시하여 준다. 이러한 시스템은 인체 모형의 구성과 차량 충돌 시험시 중요시하는 인체 부분에 대한 이해를 돕는다 실제 인간의 대신한 인체 모형의 이해는 실제 인간이 승차하고 있는 차량의 안전도의 이해를 돕는다. 본 연구에서는 차량 충돌 시험 평가와 인체 상해 기준에 대해 차량충돌 안전부문 관련자들에게 온라인으로 이용할 수 있는 정보지원시스템에 대하여 기술하였다.

• Journal of Korean Society of Transportation
• /
• v.20 no.2
• /
• pp.117-124
• /
• 2002

새로 개발한 철재 교량용 방호울타리는 기존 시설에 비해 충격흡수기능과 조망권 확보, 융설작업, 유지보수가 용이하도록 설계되었다. 본 연구는 새로 개발한 철재 교량용 방호울타리를 건설교통부의 $\ulcorner$도로안전시설 설치 및 관리지침 - 교량용 방호울타리 편. 1999$\lrcorner$ 의 설계기준에 따라 기존 고속도로에 사용하고 있는 F형 콘크리트 교량용 방호울타리와 성능비교를 통해 평가하고자 하였다. 비교평가는 S2급 교량용 방호울타리의 시험기준으로 실시하였으며 결과는 다음과 같이 나타났다. 첫째, 소형승용차를 대상으로 한 운전자의 안전도 평가에서는 두가지 시설 모두 강도성능, 충돌 후 차량 안전성능 구성 부재 비산 억제 성능 등 세 가지 기준을 만족하였으나, 가속도 기준에 있어서는 철재 교량용 방호울타리는 기준인 20g 이하인 18.2605g로 나타나 안전기준을 만족하였고, F형 콘크리트 교량용 방호울타리는 20.1791g로 나타나 기준을 약간 상회하는 것으로 나타났으나 안전기준의 범위에 있는 것으로 평가하였다. 둘째. 대형차량을 대상으로 한 방호울타리의 구조적 안정성 평가에 있어서는 F형과 철재 교량용 방호울타리 모두 평가기준에 적합한 것으로 나타났다. 새로 개발한 철재 교량용 방호울타리는 국내 최초로 모의충돌시험과 실물차량 충돌시험을 통해 개발하였다는 의의를 가지고 있으며 성능측면에서도 기존의 시설에 비해 충분히 안전하다는 것을 증명하였다. 그러나 측정시설의 미비로 충돌후의 차량의 이탈속도나 이탈각도에 대하여 만족할 만한 수준의 결과를 제시하지는 못하였다.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.32 no.4A
• /
• pp.197-206
• /
• 2012

It is found the first case of broad interpretation of the crash analysis in MASH (Manual for Assessing Safety Hardware, AASHTO, 2009) which is the guideline of roadside safety features in United States. They introduced the procedure of calculating 1,500 kg sedan safety index from the 2,270 kg pick-up truck crash test for crash cushion. First, following MASH's method, calculate 0.9 ton vehicle crash data and safety index using 1.3 ton vehicle crash test data and compare with actual 0.9 ton vehicle crash test data. results show that actual test data and the data calculated by MASH's method have great difference. Second, analyse the cause and develop new method. Proposed method can estimate not only the lighter vehicle (0.9 ton) crash data from the heavier vehicle (1.3 ton) crash test but also heavier vehicle (1.3 ton) data from lighter vehicle (0.9 ton) test. This method is superior to MASH's method and has stronger theoretical foundation. This paper proves the efficiency and the accuracy of new broad interpretation method using crash test data and investigates the principle.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.28 no.2D
• /
• pp.163-170
• /
• 2008

According to the rules, a crash cushion is supposed to set up products that is satisfied with the standard of a performance test after performing the car crash test by road safety facilities and management guide. For development of crash cushion, performance should be estimated through the car crash test eventually. However, there is no reasonable design method which considers passenger's safety and only depend on crash test without an alternative plan. Therefore it incurs a loss materially and takes a lot. Therefore, we are asked to create a systematic design of the crash cushion. This study shows that a scientific basis of applying single degree of freedom when it designs the crash cushion after analyzing vehicle crash test data of crash cushion and also represents design of crash cushion through single degree of freedom response spectrum using calculated by crash test data on crash cushion.

• Journal of Korean Society of Transportation
• /
• v.21 no.1
• /
• pp.115-125
• /
• 2003

The concrete median barriers are the most popular safety appurtenance that can be installed on narrow medians and are effective in keeping uncontrolled vehicles from crossing into opposing lanes of traffic. It is necessary to install and maintain median barriers because it is very difficult to reserve enough room required for medians in KOREA. Also, concrete median barriers are accepted as the actual alternatives for median barriers, mostly because they require almost no maintenance even after serious collisions. Typical concrete median barriers are 810mm high and have 596mm high glare screens on top of them. However we have experienced a number of "climb" and "roll-over" accidents of heavy vehicles and most of all, there have been some serious accidents caused by the part of broken glare screens. So the improvement study of concrete median barriers started. Prior to this study, a new type of concrete median barrier was suggested which is 1,270mm high and has no glare screens on top of it. So it was required to compare the properties of various types of concrete median barriers including the new type to find the optimal type of concrete median barrier. In this study, we have evaluated the characteristics of four types of concrete median barriers (New Jersey type, F type, constant slope type, and wall type). We have performed many computer simulations for the evaluation of the crashworthiness of them, and through the simulations we have tried to find a proper type of concrete median barrier. Through the computer simulations, we evaluated the structural stability and safety of the four types of concrete median barriers. We confirmed the structural stability and safety of them But in regard to the probability of "roll-over" of heavy vehicles, the higher concrete median barriers showed better performances than the lower. As the result of this study a new type of concrete median barrier was recommended.

• Journal of the Korean Society for Railway
• /
• v.10 no.3 s.40
• /
• pp.337-342
• /
• 2007

소형궤도 차량 시스템(PRT: Personal Rapid Transit)은 짧은 거리에 비교적 많은 승객을 수송하기 위하여 매우 짧은 차간 간격을 요구하며 또한 차량 간의 충돌을 피하기 위해서 매우 정확한 차량 속도제어 알고리즘을 필요로 한다. 본 논문에서는 소형궤도차량 시스템의 차량의 충돌회피 알고리즘 개발을 위한 장치의 구성에 대해서 다룬다. 개발 장치는 모의 차량, 중앙제어 시스템, 모의지상설비, 모니터링 장치로 구성되며, 설계된 알고리즘의 모의시험을 위해서 Labview Simulation Interface Toolkit과 Matlab/Simulink가 결합된 모의시험 환경을 이용한다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.17 no.3
• /
• pp.171-176
• /
• 2016

This paper proposes road safety facilities applying Hot-dip zinc-aluminum-magnesium alloy-coated steel sheets and coils to reduce the loss of function caused by the corrosion of steel in the service state. Vehicle crash simulations and full-scale crash tests were carried out to provide reliable information on evaluating the crash performance with the products of road safety facilities built with hot-dip zinc-aluminum-magnesium alloy-coated steel. From the results of the simulations and full-scale crash tests, the impact behaviors evaluated by the three-dimensional crash simulations considering the strain-rate dependency in a constitutive model were similar to those obtained from the full-scale crash test results. The full-scale crash test results met the crashworthiness evaluation criteria; hence, the proposed bridge barrier in this paper is ready for field applications.

• Journal of the Korean Society for Railway
• /
• v.16 no.5
• /
• pp.365-371
• /
• 2013

This study describes impact test methods for a rolling-stock windscreen executed in Korea and Europe. Air-pressurized impact test equipment for the front windscreens of high speed trains was designed and manufactured. The equipment is capable of launching a projectile at 500km/h, in accordance with EN 15152's impact test method. Calibration of the test equipment was conducted to find an equation relating air pressure and projectile velocity. Specimens ($1000mm{\times}700mm$) having similar specifications with the front windscreens in metro and conventional trains were used to conduct impact tests with this equipment to research the impact characteristics of the screens according to the impact velocity.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.36 no.8
• /
• pp.935-943
• /
• 2012

In accidents involving the collision of railway vehicles, there is a risk that structural members might penetrate the cab frame of the railway vehicle in the space in which the driver or passengers are seated. To reduce this risk, worldwide, studies on the collision of railway vehicles are underway. In North America, the Code of Federal Regulations (CFR) was revised in 2010 to include crush criteria for a collision and the corner post in an end frame. In this study, a crush analysis and crush test for a collision post and a crash analysis for a rigid cylinder were performed according to the CFR. The analysis and test results were compared and reviewed. This study aims to determine the usefulness of crush analysis for developing various end frames, and to understand the crush and crash characteristics and review the accuracy of the analysis.

• 도로교통
• /
• s.95
• /
• pp.40-51
• /
• 2004