http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
노즐이 원자력 배관의 파단전누설 해석 결과에 미치는 영향
김영진,허남수,곽동옥,유영준,표창률,Kim, Yeong-Jin,Heo, Nam-Su,Gwak, Dong-Ok,Yu, Yeong-Jun,Pyo, Chang-Ryul 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.11
For traditional Leak-Before-Break(LBB) analyses, symmetric conditions were assumed for a pipe-nozzle interface to simplify the analysis in calculating J-integral. However. this assumption could result in an overly conservative design criteria for a pipe-nozzle interface, Since the pipe-nozzle interface is asymmetric due to the difference of stiffness between pipe and nozzle, it is required to develop a new methodology considering the nozzle effect. The objective of this paper is to evaluate the effect of nozzle no the development of LBB design criteria for nuclear pipings. For this purpose, extensive finite element analysis were performed to evaluate the effect of nozzle on Crack Opening Area(COA), Detectable Leakage Crack(DLC) length and J-integral values. In conclusion, it was proven that the application of LBB concept could be extended for more nuclear piping system by considering the nozzle.
임주락,문형철,소순영,전형권,곽동옥 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.10
전북 부안군 변산면에서 야간 채집한 옥색긴꼬리산누에나방의 발육특성 및 기주식물을 탐색하기 위하여 실내사육을 실시한 결과 채집후 4~5일이내에 산란을 하였고, 암컷 한 마리당 평균산란수는 122.8개였고, 일평균산란수는43.1개였으며, 난기간은 8.3일이었다. 까치박달나무를 먹이로 사육한 옥색긴꼬리산누에나방 유충은 5회 탈피하였고,1령충은 검정, 2령충은 밤색, 3~5령충은 초록색으로 색채변이가 있었다. 유충 발육기간은 1령 3.7일, 2령 6.6일,3령 11.0일, 4령 6.6일, 5령 24.5일이었고, 번데기는 나뭇잎을 엮어 그안에 고치를 짓고 번데기가 되었으며, 21.2일정도 경과하여 성충으로 우화하였다. 옥색긴꼬리산누에나방 유충의 기주식물 선호성을 분석하기 위하여 까치박달나무, 오리나무, 참나무, 단풍나무 잎을 먹이로 각각 개체사육을 실시하고, 한편으로 한 용기에 4가지 잎을 넣고,선호성을 조사한 결과 오리나무와 까치박달나무만 섭식을 하였고, 참나무와 단풍나무잎은 거의 섭식하지 않았으며,오리나무를 가장 선호하였고, 발육기간도 가장 빠르고, 사망률도 적었다.
와이어 본더용 Horn-Holder Assembly의 접촉 해석
장창수,안근식,김영준,곽동옥,부성운,Jang, Chang-Soo,Ahn, Geun-Sik,Kim, Young-Joon,Kwak, Dong-Ok,Boo, Seong-Woon 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.10
Joint structure of a transducer horn-holder assembly fur a wire bonder was examined through FEM contact analysis. A three dimensional modeling and analysis was carried out to survey the internal physics of this structure and to prove the accuracy of a computation compared to a measurement. After validation, a simple two dimensional model was built fur various parametric study considering the efficiency and speed of the computation. Several factors such as boundary conditions, a modeling boundary, mesh density and so on, were considered to obtain consistency with three dimensional analysis. An arc angle and a position of each holder boss were chosen as design parameters. A design of experiment was applied to find out an optimized design of the holder geometry. As a result, a guideline for holder boss design was suggested and main factors and their influence on stress concentration in the transducer horn were surveyed.
임주락,문형철,김동완,권석주,한수곤,곽동옥,Lim, Ju-Rak,Moon, Hyung-Cheol,Kim, Dong-Wan,Kwon, Suk-Ju,Han, Soo-gon,Kwak, Dong-Ok 한국응용곤충학회 2017 한국응용곤충학회지 Vol.56 No.2
Thirty-three species of insect pests including of two-spotted spider mite, Tetranychus urticae Koch, and air-breathing land snail, Acusta despecta Sowerby, were observed on mulberry for producing mulberry fruits in Jeonbuk province from 2015 to 2016. Of these, 8 species of insect pests, including of mulberry thrips, Pseudodendrothrips mori Niwa, are regarded as major insect pests. Of the 25 species observed before harvesting, 6 species-P. mori, Anomoneura mori, Pseudaulacaspis pentagona, Baris deplanata, Menophra atrilineata and T. urticae-are regarded as major insect pests. In contrast, of the 20 species observed after harvesting, 5 species-P. mori, P. pentagona, Glyphodes pyloalis Walker, Hyphantria cunea Drury and T. urticae-are regarded as major insect pests. Eight of the major insect pest species and nine other insect pest species-including Hexcacentrus unicolor Serville, Malcus japonicus Ishihara et Hasegawa, Halyomorpha halys stal, Xylosandrus germanus Blandford, four species of Repidoptera (Bombyx mandarina Moore, Euproctis subflava Bremer, Acronicta major Bremer, Agrotis trifurca Butler), and Acusta despecta Sowerby-were observed at all sites studied, although occurrence of the insect pests observed on mulberry varied from site to site. 2015년부터 2016년까지 전북지역 오디 생산용 뽕나무에서 점박이응애(Tetranychus urticae Koch)와 명주달팽이(Acusta despecta Sowerby) 2종을 포함하여 총 33종의 해충이 조사되었다. 그 가운데 뽕나무총채벌레(Pseudodendrothrips mori Niwa)를 포함한 8종이 주요 해충으로 분류되었다. 수확 전에는 총 25종이 조사되었는데, 그 가운데 뽕나무총채벌레(P. mori), 뽕나무이(Anomoneura mori Schwarz), 뽕나무깍지벌레(Pseudaulacaspis pentagona Targioni Tozzetti), 뽕나무애바구미(Baris deplanata Roelofs), 뽕나무가지나방(Menophra atrilineata Butler), 점박이응애(Tetranychus urticae Koch) 6종이 주요 해충으로 분류되었다. 수확 후에는 총 25종이 조사되었는데, 그 가운데 뽕나무총채벌레(P. mori), 뽕나무깍지벌레(P. pentagona), 뽕나무명나방(Glyphodes pyloalis Walker), 미국흰불나방(Hyphantria cunea Drury), 점박이응애(T. urticae) 5종이 주요 해충으로 분류되었다. 오디용 뽕나무에서 발생하는 해충은 조사지역에 따라 달랐으나, 뽕나무총채벌레 등 주요 해충 8종과 베짱이(Hexcacentrus unicolor Serville), 뽕나무노린재(Malcus Japonicus Ishihara et Hasegawa), 썩덩나무노린재(Halyomorpha halys Stal), 오리나무좀(Xylosandrus germanus Blandford), 나방류 4종(Bombyx mandarina Moore, Euproctis subflava Bremer, Acronicta major Bremer, Agrotis trifurca Butler) 및 명주달팽이(Acusta despecta Sowerby)는 모든 조사지역에서 발생되었다.