• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2007.04a
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• pp.217-221
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• 2007

In this study, forced vibrations analysis was performed for main wing of small scale WIG vehicle which is equipped two-stroke pusher type propeller engine, in terms of structural. for the frequency response analysis, excitations were assumed by H-mode(Horizontal mode), X-mode(Twisted mode) which is main vibration mode of engine, and for the transient response analysis, excitations were assumed by L-mode(Longitudinal mode) with propeller thrust which is occurred when it revolution.

• 월간 기계설비
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• s.235
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• pp.41-46
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• 2010

인천국제공항에서 불과 15분 거리며 비행거리 3시간 반 이내에 중국, 러시아, 일본 등을 빠르게 오갈 수 있는 곳. 바로 송도 국제도시이다. 지금 송도가 새롭게 변신하고 있다. 머지않아 송도는 한국을 동북아시아의 비즈니스 허브로 자리매김하는 데 핵심적인 역할을 할 것으로 예상된다. 송도는 송도국제업무단지 경제자유구역으로 지정된 세계 최초의 신(新) 지속 가능 개발 도시이다. 여러 종류의 주거용 건물과 상가 건물 및 학교뿐만 아니라 건강관리 시설과 쇼핑 외식 엔터테인먼트 시설까지 전세계에서 영감을 얻은 마스터플랜에 따라 최대의 시너지 효과를 내도록 설계되었다. 또한 건축물과 대중교통의 연계선 및 건물 설계상의 에너지 저감, 모든 종류의 녹지 공간 및 주거 공간의 효율적인 인프라 등 대규모 친환경 설계에 대한 새로운 기준이 되고 있다. 송도국제업무단지에서는 세계 최고 수준의 친환경 도시를 건설하기 위하여 대부분의 프로젝트에 LEED인증을 추진하고 있다. 본지는 인천 송도지구 개발의 기본 방향과 계획에 대해 살펴보고 특히 국제업무단지의 친환경 설계와 구체적인 설비기술에 대해 알아본다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.501-504
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• 2011

In this study, structural design of the propeller blade for turboprop aircraft was performed. The propeller shall have high strength to get the thrust to fly at high speed. The high stiffness and strength carbon/epoxy composite material was used for the major structure and skin-spar-foam sandwich structural type was adopted for improvement of lightness. As a design procedure for the present study, firstly the structural design load was estimated through investigation on aerodynamic load and then flanges of spars from major bending loads and the skin from shear loads were preliminarily sized using the netting rule. In order to investigate the structural safety and stability, stress analysis was performed by finite element analysis code MSC. NASTRAN. Finally, it is investigated that designed blade have high efficiency and structural safety to analyze of aerodynamic and structural design results.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2007.11a
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• pp.7-12
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• 2007

Previously study on structural design of the main wing of the twenty-seat class WIG (Wing in Ground Effect) craft. In the final design, three spars construction was selected for safety in the critical flight load, and the Carbon-Epoxy material was selected for lightness and structural stability. In this study, the forced vibration analysis was performed on the composite main wing structure of the twenty-seat class WIG craft with two-stroke pusher type reciprocating engine. The vibration analysis based on the finite element method was performed using a commercial FEM code, MSC/NASTRAN. Excitations for the frequency response analysis were assumed as the Y-mode (lateral mode), the Z-mode (vertical mode) and the $M_{xyz}$-mode (twisted mode) which are typical main vibration modes of engine. And excitations for the transient response analysis were assumed as the X-mode (longitudinal mode) with the oscillating propeller thrust which occurs in operation.