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이종명,Lee, Jong-Myeong 한국방위산업진흥회 1992 國防과 技術 Vol.- No.155
효과적인 $C^3I$체계 구축을 위해서는 조기경보/전장감시용 정보수집장비의 보완이 시급하므로 이에 대한 많은 연구개발 투자가 필요하며 조기경보/전장감시 정보의 신속한 처리/전파를 위한 정보처리 기법을 계속 연구 발전시켜 나가야 할 것이다. $C^3I$체계의 운용 능력 목표 수준은 한반도의 자연환경하에서 온도, 습도, 먼지, 곰팡이 및 이동시 충격등 제약조건에 대한 내구성이 충분하고 24시간 계속 운용이 가능하며, 고장시 복구 및 Back-up 기능이 지원 가능하도록 되어야 할 것으로 본다
이종명(Jong Myeong Lee),이정훈(Jeong Hoon Lee),하정민(Jeong Min Ha),안병현(Byung Hyun Ahn),김원철(Won Cheol Kim),최병근(Byeong Keun Choi) 대한기계학회 2013 大韓機械學會論文集A Vol.37 No.12
물 분사 펌프는 심해 유정의 시추작업 후 유정 내 높은 압력으로 인하여 원유를 1 차 생산하고 이후 유정 내 압력이 낮아져 유정 자체의 압력 만으로 생산이 어려울 때 고압의 해수를 유정에 주입해 회수율을 높이는 해양플랜트에서 사용되는 핵심 기자재이며, 여러 기업에서 개발 중이다. 본 논문은 회전체의 동특성 을 분석하여 베어링 강성에 따른 고유진동수 변화분석, 운전속도 변화에 따른 고유진동수의 변화와 위험속도 분석, 안정성 평가, 불평형 응답을 통하여 변위와 틈새 관계 분석 등의 수학적 해석을 통하여 개발 중의 제품의 신뢰성에 기여하였다. Water injection pump outputs oil with high pressure during this process, seawater is injected into the well to recover the well pressure and maintain high productivity. A water injection pump has high productivity, and therefore, it serves as a key piece of equipment in marine plants. In this light, water injection pumps are being studied widely in industry. In this study, the rotor dynamics is analyzed to determine the natural frequency according to the bearing stiffness and operation speed change. This study aims to establish the pump reliability through critical speed, stability, and unbalance response analysis.
이종명(Jong-Myeong Lee),김용휘(Yong-Hwi Kim),하정민(Jeong-Min Ha),구동식(Dong-Sik Gu),황호준(Ho-Jun Hwang),최병근(Byeong-Keun Choi) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10
The goal of this study is a stability evaluation through eigenvalue and rotor dynamics analysis of the vacuum pump. The vacuum pump used is a roots type pump, one of the dry middle vacuum pumps, is necessary at the procedure to produce semiconductor and display. The eigenvalue evaluation is solved by numerical analysis through using Modal test and 2D?3D models. Both the experiment and the analysis result are similar, the analysis result using 2D is more oculate the 3D model comparing with test result. So rotor dynamic evaluation is performed through using 2D model. Rotor dynamic evaluation used the campbell diagram and root locus map which were acquired by complex eigenvalue analysis. And we checked minimum clearance of vacuum pump composition between two rotors through unbalance response analysis. Thus, vacuum pump, the target object of this study, was evaluated to be operated stably.
이종명(Lee, Jong-Myeong),김용휘(Kim, Yong-Hwi),하정민(Ha, Jeong-Min),구동식(Gu, Dong-Sik),최병근(Choi, Byeong-Keun) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.12
The goal of this study is the stability evaluation of a vacuum pump through modal test and rotor dynamics. Roots type vacuum pump, which is a dry vacuum pump, is necessary for the manufacturing process of the semiconductor and the display. Eigenvalue was solved by the finite-element method(FEM) using 2D and 3D models, then the modal test result was compared with the FEM result. According to the comparison, the analysis result using the 2D was more accurate than the 3D model. Therefore, rotor dynamics was performed by the 2D model. Campbell diagram and root-locus maps, which were calculated by complex-eigenvalue analysis, were used to evaluate the stability of the rotors of the vacuum pump. And displacement solved by unbalance response analysis was compared with the minimum clearance between two rotors of the vacuum pump. Thus, the vacuum pump is assumed operated under steady state through the evaluation of the rotor dynamics.