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FSI 해석기법을 이용한 에어건 수중발파 응답해석 검증
이상갑,이재석,박지훈,정태영,이환수,박경훈 대한조선학회 2017 大韓造船學會 論文集 Vol.54 No.6
Air gun shock system is used as an alternative energy source as part of the attempt to overcome the restrictions of economical expense and environmental damage, etc., due to the use of explosives for the UNDerwater EXplosion (UNDEX) shock test. The objectivity of this study is to develop the simulation technique of air gun shock test for the design of model–scale one for the near field non-explosive UNDEX test through its verification with full-scale SERCEL shock test result. Underwater blasting response analysis of full-scale air gun shock test was carried out using highly advanced M&S (Modeling & Simulation) system of FSI (Fluid-Structure Interaction) analysis technique of LS-DYNA code, and was verified by comparing its shock characteristics and behaviors with the results of air gun shock test.
이상갑,김영채,이성화,이옥재,김기홍,임정욱,김현진,정을조 대한소화기학회 1999 대한소화기학회지 Vol.34 No.1
Intussusception occurs mostly in children and rarely (only about 5% of cases) in adults. In contrast to pediatric intussusception, most cases of adult intussusception result from benign or malignant tumors and is usually treated with surgical resection. Here, we present a case of chronic intussusception in adult. It was induced by lipomas in jejunum. A 57-year-old woman complained of intermittent, colicky abdominal pain and distention for about 1 month. A 10×20 cm sized, soft mass was palpable in the left abdomen during the development of pain. Abdominal computed tomography scan revealed a concentric ring of bowel with intramural thickening. At laparotomy, jejuno-ileal intussusception was identified and two polypoid masses were recognized after manual reduction. The masses and jejunal segment were resected. Microscopic examination of the masses showed the features of submucosal lipomas.
계몽과 혼혈의 서사 -광복 전 재미 한인소설을 중심으로
이상갑 한국문학이론과비평학회 2009 한국문학이론과 비평 Vol.42 No.-
This thesis primarily from the Korean-American literature extracts a life's suffering and a critical mind that the early emigrants have had, and futhermore certifies how they have overcome the sufferings before Korea's liberation from japan. before Korea's liberation from japan, the Korean-American are so-called the early emigrants, therefore the literature that they have worked shows in a concrete way the identity and the critical mind of the emigrants in America. Specially before Korea's liberation from japan the Korean-American literature simply does not focus on the national identity, but deeply describes the conflict of pure blood's sense and mixed blood. It criticizes the pure blood's sense as the eye sight of the people-oriented concerned with the sex, suggesting the many examples that the emigrants marry with the emigrants or the mixed blood's man. And this shows the prejudice of racialism, moreover the emigrants are bounded to the prejudice of racialism oriented the west, disregard the colored person or the mixed blood's man. It shows the thinking of the adherent colonialism.
CIS 고려인 소설의 주제의식 연구 - 1990년대 이후 작품을 중심으로 -
이상갑,김영미 한국언어문학교육학회 2016 한어문교육 Vol.35 No.-
Today Korea is to the Russian korean in CIS merely hometown which their ancestors have been lived. The first generation remembers their homeland and the Maritime Province that they departed. But after the second generation homeland and the Maritime Province is their parent’s hometown not their hometown. A large portion of them don’t know utterly Korean. In the period of Soviet Stalin proclaims Russian as official language. Accordingly the Russian korean in CIS studied Russian hardly. But the situation changed largely after reformation open of Soviet in 1990s. After reformation open each country nominates their own language, the Russian korean in CIS had to study the local language for their life and education of children. The writer that uses Korean almost disappeared now. In these circumstances what is the direction that the Russian korean literature in CIS goes forward. They have been suffered largely discrimination as emigrants from migration to this. But for that reason they experienced the importance of not discrimination but difference. In that respect they have been pursued the universal value until now. Therefore the literature world of Song Raverenzi, Gang Alexandere, writers from North Korea and Park Mihail is noted. Therefore we must not lock their literature up excessively in the formality of the national identity. We must introspect their literature and life in not our insight but their insight as it is.
이상갑,공길영,Hong-Anh,조헌일 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
산적화물선의 해난사고에 대한 객관적인 검증을 위하여 LS-DYNA의 유체-구조 연성(FSI; Fluid-Structure Interaction) 해석기법을 사용하여 주변의 해수(seawater)를 고려하여 수면에 떠 있거나 수중에 잠겨있는 컨테이너 박스와의 내충돌 응답해석을 수행하였다. 충돌에 대한 역학적 거동과 손상 결과를 본 해난사건의 손상 자료와 비교 검토하여 역으로 충돌 당시의 부유체의 선박과의 충돌상황을 추정하였다. 본 연구에서와 같이 FSI 해석기법을 사용하여 주변 해수로 인한 선박과 컨테이너 박스의 운동(motion)을 구현할 수 있었고, 또한 이들의 운동으로 인한 상호 간섭효과도 고려할 수 있었다. 두 물체가 근접함에 따라 발생하는 압착압력(squeeze pressure)과 항행하는 선박의 측벽을 스쳐지나가는 컨테이너 박스가 받는 간섭력(bank effect) 등을 현실성 있게 고려하여 내충돌 응답을 보다 현실성 있게 추정할 수 있었다.