• 한국지진공학회논문집
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• 제3권4호
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• pp.95-100
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• 1999

암석 코아의탄성계수 측정에 동적방법은 잘 사용되지 않을뿐만아니라 그 값은 설계에 많이 사용되지 않는다 그이유는 동적으로 결정한 탄성계수 값이 정적으로 결정된 값보다 매우 큰 것 (약 10배)으로 인식되기 때문이다. 이논문에서는 암석 코아의 동적과 정적 시험결과를 제시하였다 도출괸 결과는 :1) 실내탄성파시험으로 매우 일관성 있는 탄성계수가 결정되고 2) 변형율에 따른 암석 코아의 비선형 변형특성의 잠정적 모델이 제시되었다.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 1999년도 추계 학술발표회 논문집
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• pp.149-154
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• 1999

This paper describes a passive safety injection system with free piston Stirling pump working withabundant decay heat in the nuclear reactor during the hypothetical accident. The water column in the tube assembly connected from the hot chamber to the cold chamber in the pump oscillates periodically due to thermal volume changes of non-condensable gas in each chamber. The oscillating pressure in the water column is converted into the pumping power with a suction-and-bleed type valve assembly. In this paper a dynamic model describing the frequency of oscillation and pumping pressure is developed. It was found that the pumping pressure is a function of the temperature difference between the chambers. Also, the frequency oscillation depends on the length of the tube with water column.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.48-53
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• 2014

Rocket, held using the CCA for the mission, a plurality of recording devices, and navigation equipment. In case of a projectile which is entered the water after fired into the air, after performing stages and fairing separated in flight to enter the underwater. It is caused by the explosion of gunpowder mainly, vibration phenomenon of a large transition is induced structurally very, also on entering the water, have a significant shock structurally separated. If shock is transmitted directly to the CCA through the body, it can be caused malfunction of payloads, resulting in failure of the mission of the projectile. In order to ensure the stability against shock, in this paper, Calculating a target resonacne frequency of the CCA, and verified through modal test and analysis. Maximum acceleration position of CCA is checked by SRS analysis. In addition, effectiveness of shock isolation system through shock analysis.