http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
수치해석을 위한 방진 마운트의 동적 특성 결정 및 검증
한형석(Han, Hyung-Suk),박미유(Park, Mi-You),조흥기(Cho, Heung-Gi),김중길(Kim, Joong-Gil),임동빈(Im, Dong-Been) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.9
고무재료의 비선형적인 특성으로 인해 고무재질 방진 마운트의 탄성계수와 감쇠계수는 주파수에 따라 달라 진다. 따라서 고무재질의 방진 마운트 설계 시 마운트의 동적 특성을 반드시 고려해야만 한다. 특히, 수치해석을 수 행하는데 있어 해석결과는 마운트의 동적 강성 고려 여부에 따라 크게 달라진다. 본 논문에서는 한국 해군에서 승인 되어 사용되고 있는 특정 표준 마운트에 대해 실험적으로 동적 특성을 정의하였으며, 이러한 동적 특성을 적용한 경우와 적용하지 않은 경우에 대해 수행한 수치해석 결과와 실험 결과를 비교하였다. Because the non-linear property of the rubber, the elastic modulus and damping factor of the rubber mount are dependent on the frequency. Therefore, the dynamic properties of the rubber mount should be considered when the anti-vibration mount is designed. Especially, when the numerical analysis is performed, the results can have much errors not considering the dynamic characteristics of the rubber mount. In this paper, the dynamic properties of typical standard rubber mount approved by ROK navy are defined experimentally and the results from the numerical analysis and experiment are compared for considering and non-considering the dynamic properties of the rubber mount respectively.
함정 격실에 적용되는 흡음재와 잔향시간에 따른 실내 소음 분석
한형석(Han, Hyung-Suk),박미유(Park, Mi-Yoo),조흥기(Cho, Heung-Gi),김중길(Kim, Joong-Gil),임동빈(Im, Dong-Been),손윤준(Son, Yoon-Jun) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.10
The sound field can be classified to the direct, diffract and reverberant sound field. If the sound absorption material in a room is not applied sufficiently, the reverberant sound field increases and the sound pressure in a room also increases when the sound source exists in a room. Therefore, the reverberation time should be controled in order to reduce the reverberant sound as well as sound pressure level in a room. Even though the reverberation time is specified and researched widely in architectural engineering, it is rarely performed in a marine engineering. Therefore, in this research, the reverberation time in a navel vessel is researched related to the noise reduction in a cabin.
박미유(Park, Mi-You),한형석(Han, Hyung-Suk),조흥기(Cho, Heung-Gi),김중길(Kim, Joong-Gil),임동빈(Im, Dong-Been),이민재(Lee, Min-Jae) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.1
유한요소해석을 통한 대상 구조물의 동특성 해석에 있어서 신뢰성 높은 실제 구조물의 동특성을 정확히 예 측하는 해석결과는 얼마나 신뢰성이 높은 유한요소모델을 수립하는가하는 문제와 직결된다고 할 수 있다. 따라서 많 은 경험과 노력을 통해 만들어진 모델을 대상으로 모달 테스팅을 통해 관심주파수대역에 걸쳐 모델을 검증하고, 이 때 얻어진 데이터를 이용, 모델을 개선하는(Model updating) 작업을 거치게 된다. 본 연구에서는 이와 같이 중량과 크기의 제한으로 인하여 충격망치나 가진기로 가진하기 어려운 함정의 고유진동수 등을 얻기 위한 모달 테스팅 방법으로써 함정의 시운전 항목 중 하나인 주포 사격시험을 이용하여 그 결과와 가능 성, 향후 진행방향에 대하여 고찰해 보았다. The accurate results of finite element analysis are directly related to reliability FE model which is exactly describing dynamic characteristics of target structure. So, a model updating is necessary to establish reliable FE(Finite Element) model with a lot of experience and effort using modal testing. A large structure is too difficult to obtain the dynamic characteristics owing to its weight and size. In this work, using main gun firing test, modal testing was performed to obtain dynamic characteristics of large naval vessel, which is difficult to tap the general modal testing method. The result of experiment was considered its possibility and future plans.
함정의 전투체계 콘솔 냉각 홴 소음저감을 위한 프리넘 챔버 설계
한형석(Han, Hyung-Suk),박미유(Park, Mi-Yoo),조흥기(Cho, Heung-Gi),김중길(Kim, Joong-Gil),임동빈(Im, Dong-Been) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.6
Indoor noise is very important related to the morale and fighting power of the crew as well as environmental condition for them in a navel vessel. Especially, the crew members working in CIC (combat information center) and sonar equipment room require much more quiet environment condition. One of the most serious noise source in CIC is the cooling fan noise installed in the console of the combat system. Therefore, in this paper, the design of the plenum chamber is studied to reduce the noise of the fan from these consoles by numerical analysis and experiment.
함정 격실에 적용되는 흡음재와 잔향시간에 따른 실내 소음 분석
한형석(Hyung-Suk Han),박미유(Mi-Yoo Park),조흥기(Heung-Gi Cho),김중길(Joong-Gil Kim),임동빈(Dong-Been Im),손윤준(Yoon-Jun Son) 한국소음진동공학회 2010 한국소음진동공학회 학술대회논문집 Vol.2010 No.10
The sound field can be classified to the direct and reverberant sound field. If the sound absorption material in a room is not applied sufficiently, the reverberant sound field increases and the sound pressure in a room also increases when the sound source exists in a room. Therefore, the reverberation time should be controled in order to reduce the reverberant sound as well as sound pressure level in a room. Even though the reverberation time is specified and researched widely in architectural engineering, it is rarely performed in a marine engineering. Therefore, in this research, the reverberation time in a navel vessel is researched related to the noise reduction in a cabin
함정의 전투체계 콘솔 냉각 팬 소음저감을 위한 프리넘 챔버 설계
한형석(Hyung-Suk Han),박미유(Mi-Yoo Park),조흥기(Heung-Gi Cho),김중길(Joong-Gil Kim),임동빈(Dong-Been Im) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4
Indoor noise is very important related to the morale and fighting power of the crew as well as environmental condition for them in a navel vessel. Especially, the crew members working in CIC (Combat Information Center) and sonar equipment room require much more quiet environment condition in order to increase the performance of their combat system. One of the most serious noise source in CIC is the cooling fan noise installed in the console of the combat system. Therefore, in this paper, the design of the plenum chamber is studied to reduce the noise of the fan from these consoles by numerical analysis.
예인 음탐기 콘솔의 냉각 배출 홴 소음 저감을 위한 소음기 개발
한형석(Han, Hyung-Suk),박미유(Park, Mi-Yoo),조흥기(Cho, Heung-Gi),김중길(Kim, Joong-Gil),임동빈(Im, Dong-Been),손윤준(Son, Yoon-Jun) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.12
The indoor noise of the naval vessel is very important related to the optimum environmental conditions for crews as well as the ability of fighting power of antisubmarine. Especially, sonar equipment room is one of the rooms where require to be silent because the informations of the underwater noise are collected and analyzed in there. In this paper, the sound reduction of the TASS console, one of the main noise sources in a sonar equipment room for a typical naval vessel, is described. The noise source of this TASS console is the flowing noise of cooling fan. In order to reduce this kind of noise, the plenum chamber and acoustic elbow were developed. Related to the development of the plenum chamber, the area of the air-outlet and sound absorption of the inner lining were investigated experimentally with the evaluation system of the sound insertion loss. Acoustic elbow was also manufactured and evaluated with the evaluation system of the sound insertion loss. Finally, in order to evaluated the ability of noise reduction of the plenum chamber and acoustic elbow, the indoor noise of the sonar equipment was measured when they were appled to TASS console.