• Title/Summary/Keyword: 미국기계학회법규

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Energy Absorption of Collision Post Based on North American CFR Regulations for Railway Vehicles (철도차량의 북미 CFR 법규에 대한 충돌 기둥에너지 흡수에 관한 연구)

  • Kim, Seung-Tech;Jeong, Ji-Ho;Choi, Jeong-Yong;Woo, Kwan-Je
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.8
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    • pp.935-943
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    • 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.

Abnormal Operation Analysis of the Wolsong 2,3,4 Heat Transport System (월성 2,3,4호기 열수송계통의 비정상 운전 해석)

  • Shin, J.C.
    • Journal of Energy Engineering
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    • v.25 no.1
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    • pp.15-22
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    • 2016
  • The heat transport system transients of Wolsong 2,3,4 nuclear power plants were analysed during abnormal operating conditions. The compliance with requirements of AECB Regulatory Document R-77 for CANDU reactor was estimated. The analysis results showed that for each postulated accident the peak pressure values in the reactor headers are within the acceptance criteria given in ASME code requirements. The effect of LRV that is one of the overpressure protection device was very minor.

Test and Evaluation based on Standard Regulation of USA Federal Automotive Safety of Assistant Driver's Seat Airbag at Low Risk Deployment Passenger Airbag using Passenger Protection Wrap (승객보호용 랩을 적용한 저위험성 조수석 에어백의 미국 연방 자동차안전 기준법규에 의거한 시험과 평가)

  • Kim, Dong-Eun;Kim, Jin-Hyeong;Kang, Myung-Chang
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.15 no.1
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    • pp.61-67
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    • 2016
  • The airbag is a widely accepted device for occupant protection in the automotive industry. As the injuries induced by airbag deployment have become a critical issue, revisions to Federal Motor Vehicle Safety Standard (FMVSS) 208 were required to create advanced airbags that can protect occupants of varying statures. In this paper, we developed a new low-risk deployment passenger airbag by adding the Passenger Protection Wrap (PPW). The PPW reduces the cushion impact force to the occupant in order to ensure pressure dispersion. A series of tests were conducted by using FMVSS 208 test procedures to demonstrate the proposed system. It was found that the system not only satisfied the injury criteria of FMVSS 208 but was also effective for protecting passengers of all sizes (male, small female, 3-year-old, 6-year-old).

Designing FMH Impact-Absorbing Structure by Using Subcomponent Collapse Simulation (단품 압궤 시뮬레이션을 이용한 FMH 충격흡수부재의 설계방법에 관한 연구)

  • Kim, Ji-Hun;Jun, In-Ki;Choi, Jae-Min;Kim, Sung-Hun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.8
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    • pp.1113-1118
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    • 2010
  • It is requested that the interior compartment of a passenger vehicle must be satisfied with the FMVSS201U regulation, FMH impact test. It is needed the design methodology to find the appropriate structure about the FMH impact. When designing the impact-absorbing structure for the FMH impact test, it is to be noted that the impact absorber must have different performance considering the stiffness of the vehicle as the impact position and approach angle of FMH. In this study, an efficient design methodology was developed by using subcomponent collapse simulation instead of conducting full-vehicle simulation, thereby reducing the time and resources spent. Further, this unit-model simulation helps optimize the impact absorbing structure.