통합 검색 | Korea Science

김진혁;전성민;박종연;유재한;정은환
- 한국추진공학회:학술대회논문집
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- 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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- pp.928-929
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- 2017
한국형발사체개발 사업의 일환으로 75톤급 액체로켓엔진이 개발되었다. 액체로켓엔진을 개발하는데 있어 지상연소시험의 수행은 필수적이며, 이를 통해 전체 엔진 시스템에 대한 다양한 검증이 수행될 수 있다. 본 연구에서는 75톤급 액체로켓엔진의 지상연소시험을 수행하고 지상연소시험 중 측정된 진동 신호의 분석에 관하여 개략적인 내용을 기술하였다. 진동 응답 특성 측정 및 분석은 전체 구조물의 건전성 및 구조설계를 검증하는데 있어 매우 중요한 지표로 활용될 수 있다.
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이홍기;박상곤;전종균;손성완
- 한국반도체및디스플레이장비학회:학술대회논문집
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- 한국반도체및디스플레이장비학회 2005년도 추계 학술대회
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- pp.49-54
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- 2005
In the case of a sensitive equipment, it require a vibration free environment to provide its proper function. Especially, lithography and inspection device, which have sub-nanometer class high accuracy and resolution, have come to necessity for producing more improved Giga Class semi conductor wafers. The aim of this study is to evaluate the allowable vibration response of a precision inspect ion equipment, which has some trouble in field, by using experimental measurement data and to proposal a proper ant i-vibration method.
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전종균;김강부;백재호
- 반도체디스플레이기술학회지
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- 제2권3호
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- pp.37-43
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- 2003
It is necessary to design the anti-vibration system of precision machinery for a quality assurance. However, in general, the allowable vibration limit is not well known. In this paper, the vibration criteria for foundation of sensitive machinery is proposed and anti-vibration system is designed by using vibration measurement results of foundation. Also, the finite element analysis is performed to verify the effectiveness of the designed anti-vibration system and to determine the allowable dynamic loads of precision measuring system. The results of this study will be helpful for the future design of anti-vibration structures with nano scale measuring system.
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김인수;김종연;한문성;김영중
- 한국소음진동공학회:학술대회논문집
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- 한국소음진동공학회 2001년도 추계학술대회논문집 I
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- pp.329-334
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- 2001
Recently, the high precision technology can not be developed continuously if we don't have anti vibration technology. Vibration isolation technology using an air spring and laminated robber bearing is widely used because it has excellent vibration isolation characteristics. We developed high precision vibration table with two good element(air spring and LRB) for semiconductor factory. Air Spring is used for isolating the vertical vibration and LRB is used for isolating the horizontal Vibration. As a result, It has D-Class degree in BBR-Criteria. In this paper, we talk about orifice characteristics in the self-damped air spring and design flow of the laminated robber bearing. The orifice characteristics is delicate shade of length and diameter. When we do experimentation to find orifice characteristics, length is fixed and diameter is changed. The orifice diameter is the wider and the air spring stiffness is the softer.
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박철현;김영춘;조경구;양보석
- 동력기계공학회지
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- 제11권1호
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- pp.16-19
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- 2007
The large generator rotor used in fossil power plant has the possibility of high 2X vibration due to asymmetric shaft stiffness. The generator rotor is machined into pole faces to reduce stiffness difference and then is tested through 2X vibration measurement when the balancing works are performed in the balancing shop. However, there are many cases of large difference values between 2X vibration in the balancing shop and 2X vibration in site. This paper presents a new method to estimate 2X vibration in site with more accuracy and applied for the retrofit of a fossil 400 MW class deteriorated generator. It shows that the new generator rotor is manufactured with a good 2X vibration characteristics and is operated in a low 2X vibration level although the generator rotor has high 2X vibration in the balancing shop.
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