http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
GENOA를 활용한 라이너 두께에 따른 복합재 고압용기의 파손압력 해석
이승윤(Rhee, Seung Yun),김광수(Kim, Kwangsoo) 한국항공우주연구원 2018 항공우주산업기술동향 Vol.16 No.2
고강도 경량화를 위해 알루미늄 합금 라이너 위에 고강도 복합재를 필라멘트 와인딩하여 제작한 Type III 복합재 고압용기가 널리 사용되고 있다. 본 논문에서는 AL6061-T6 라이너에 T-800 탄소섬유 복합재를 와인딩한 고압용기의 라이너 두께에 따른 파열압력 해석 결과를 제공한다. 복합재 구조물의 강도, 내구성 및 신뢰성 평가를 위한 복합재 특화 소프트웨어인 GENOA를 활용하여, 복잡한 와인딩 패턴을 모델링하고 점진적 파손해석을 수행하여 파열압력을 계산하였다. The type III composite overwrapped pressure vessels (COPVs), which are fabricated by overwapping an aluminum alloy liner with reinforcing carbon fibers impregnated in a bath with epoxy resin, have been used in the automotive and aerospace industries for many years to provide a high strength and lightweight storage cylinder for pressurized gases. In this paper, we will provide the analysis results for the burst pressure of COPVs, which are composed of Al6061-T6 and T-800 carbon fibers, for various liner thicknesses. We used a composite analysis solution, GENOA, in modeling the complicated filament winding patterns and calculating burst pressures by a progressive failure analysis.
한진목,최수광,이성희,조경철,황철민,정영관 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.4
During last years, hydrogen refueling infrastructure test and devices research for hydrogen station presented a significant growth consisting of the commercialization of fuel cell electric vehicles (FCEVs). However, we still have many challenges for making commercial hydrogen stations such as increased safety and cost reduction. This study demonstrates the low cost hydrogen storage tank (type 2) and effective winding method for high pressure hydrogen storage. We use numerical analysis to verify stress changes inside the wire according to the winding condition. Also liner size, winding wire size and wire tension were studied for the safety and cost down. Results show that the stress of winding wire decreased with increased winding angle and increased the liner diameter. On the other hand, the stress of winding wire increased according to the increased wire thickness and tension.
Type 2 고압용기를 위한 금속선재의 Hoop Wrap에 관한 이론 연구
김승환,한진목,정영관 한국수소및신에너지학회 2020 한국수소 및 신에너지학회논문집 Vol.31 No.2
Recently, Type 2 high-pressure hydrogen storage tank is studied due to fast defect detection, easy manufacturing, and cost efficiency. Moreover, the dry winding a high-strength metal wire will make increased economic efficiency compare with the wet winding method and the carbon/glass fiber winding method. In this study, a theoretical study on the dry winding of a Type 2 high pressure hydrogen tank using a metal wire was done, and the equations of the total stress on the aligned and the staggered winding for the hoop winding were derived, and the following results were obtained by using these equations. As the diameter of the metal wire, the number of winding layers, and the outer diameter of the liner increase, the maximum stress decreases, but the difference between the maximum stress occurring in the aligned winding and the staggered winding increases. As the pressure increases, the thickness of the winding layer increases, but as the strength of the metal wire increases, the thickness of the winding layer decreases. In addition, regardless of the strength of the metal wire, the thickness of the winding layer of the staggered winding was about 13.4% thinner than that of the aligned winding.
Study on the Synthesis Method of Simulated CRUD for Chemical Decontamination in NPPs
강덕원,김진길,김경숙 한국방사성폐기물학회 2010 방사성폐기물학회지 Vol.8 No.2
국내 원자력발전소의 가동년수 경과에 따른 방사능 오염증가로 제염공정에 대한 관심은 점차 점증되어 가고 있다. 화학제염은 방사성폐기물의 생성과 방사선량율을 낮추는데 매우 중요하다. 이에 앞서, 원전 주요계통 및 부품 등의 화학제염을 위해서는 대상 재질에 적합한 산화제 및 제염제를 우선 선정하여야 한다. 이를 위해서는 제염대상물 혹은 제염대상 계통에서 채취한 크러드에 대한 각종 분석을 실시하여 크러드의 화학조성 및 결정구조에 대한 정보를 확보해야 하나 실제적으로 방사능을 띤 계통으로부터 시료를 직접 채취할 수 있는 특별한 프로그램이 마련되어 있지 않는 한 극히 제한된 방사능을 띠고 있는 부식산화물의 자료만을 얻을 수 있다. 크러드의 조성은 모재의 성분과도 밀접한 관계가 있기 때문에 재장전 주기에 따라서도 차이가 많다. 따라서 가능한 한 제염대상을 선정한 다음 제염대상으로 채취한 크러드에 대한 각종 분석자료를 확보하거나 분석을 실시하여야 한다. 본 논문은 미확보 시료에 대한 대안으로 모의크러드를 다양한 방법으로 제조하는 기술에 대해 언급하였다. 금속 산화물과 금속 수화물이 12가지의 각기 다른 방법으로 실제 시료와 유사한 화학조성과 결정구조를 지닌 모의크러드의 합성에 사용되어졌다. CRUD#4(압력용기속의 금속산화물)와 CRUD#10(하이드라진 전 처리후 도가니속의 금속산화물)시료가 Type 1, 2에 대해 가장 양호하게 합성되어졌다. 이들 크러드 시료들은 특별한 장비를 사용하지 않고도 짧은 시간 내에 반응이 이루어지고 많은 량의 시료를 쉽게 합성할 수 있게 됨으로서 제염제와 제염공정을 개발하는데 매우 유용하게 활용될 수 있을 것으로 기대된다.
고압가스 내압용기 장착 대형상용차의 측면충돌 시 연료장치 안전성 평가 방법에 관한 연구
인정민(Jeongmin In),한현민,김시우,신재호(Jaeho Shin) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Heavy duty vehicles equipped with high pressure vessels are expected to expand the supply of hydrogen commercial vehicles like large bus and trucks according to the governments hydrogen economy roadmap (2019 yr). In particular, the hydrogen fuel pressure vessels have high pressure about 700 bar unlike other fuel pressure vessels, so there are possible to high severe accidents due to damage and leakage of the fuel system when happened side collisions and rollover accidents from actual roads. high. Currently, there is no actual vehicle crash evaluation(Full scale crash test) for fuel system integrity of heavy duty vehicles of post-crash through worldwide except Korea. The regulations applied the alternative acceleration test (Sled) that evaluates only the severity according to the inertial load in the case of a collision. Korea does not also evlauate actual crash test about side impacts happened most frequent accident cases. The purpose of this study is to confirm the necessity of actual crash evaluation and to verify fuel system safety through those tests. In addition, heavy duty vehicles not only need the actual vehicle crash evaluation but also the module systems of Compressed hydrogen storage systems because of the small-volume production of multiple types, relatively high test vehicle cost and various fuel install locations unlike passenger cars. Through this study, find the risk mechanisms such as fuel system leakage/damage according to side collisions, so the following results were derived. First, find the evaluation necessity according to the direct impact load as well as the inertia load from actual crash tests. Second, the intrusion of the vehicle stucture around the fuel systems is more effects than the impact acceleration in terms of actual crash test. Third, the dangerous situations of the fuel system like fuel leakage does not happen the direct contact with vehicle structure or ground but the fuel system breakage of the valves and connection pipes of the fuel system. This study results are expected to utilize the basic data for developing new side crash evaluation methods for heavy duty vehicle vehicles like buses and trucks equipped with high pressure vessels.