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최적화된 왕복동식 수소 압축기용 완충기의 진동 특성 분석
김효중(H. J. Kim),구동식(D. S. Gu),최병근(B. K. Choi) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The reciprocating type hydrogen compressor is occurred by the pulsation from the mechanism and this pulsation is make much noise and vibration. Therefor snubber is installed for pulsation decreasing. The five type snubber models were designed for increasing pulsation amplitude reduction and decreasing pressure loss in snubber considering output pipe location as design value. And the pressure flued analysis is carried by CFD. In this paper, each type snubber according CFD result are analyzed by the MSC/NASTRAN to identify the vibration characteristic of each type. The vibration resvults are compared with CFD results.
김효중(H. J. Kim),구동식(D. S. Gu),정한얼(H. E. Jeong),김학은(H. E. Kim),최병근(B. K. Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
The reciprocation hydrogen compress has pulsation which is happen noise and vibration. Noise and vibration that happen by pulsation have bed effect machine and working environment. So, must know vibration special quality of compress to decrease these noise and vibration. but each machine have a different of vibration special quality. So, standard is needed for assessment of the vibration special quality. In this paper, a study is achieved about ISO, VDI and KS standard to assess the vibration of reciprocating type compressor. The hydrogen compressor is measure and diagnosis base on the VDI 3838 in this paper.
김효중(H J Kim),구동식(D S Gu),정한얼(H Y Jung),최병근(B K Choi) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The reciprocation hydrogen compress has pulsation which is happen noise and vibration. Noise and vibration that happen by pulsation have bed effect machine and working environment. So, must know vibration special quality of compress to decrease these noise and vibration, executed analysis using nastran that is common use program. Find and compared each mode shape when consider Crank case analysis and consider Crank case and cylinder together through free vibration. And to search rejoinder about shock by Crank easel s pulsation 0 ~ 100 ㎐ because do sweep forced oscillation analysis achieve.
구동식(D. S. Gu),정한얼(H. Y. Jung),김효중(H. J. Kim),최병근(B. K. Choi) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
A few intake stations have vibration problems caused by pumps, motors and pipes. The vibration transferred from pumps, motors and pipes excites building severely. Therefore, the crack is generated on building wall and people who work at intake station are damaged. In this paper, the vibration and noise have been measured and analyzed for pumps, motors, pipes and building at intake station. Also, the cause of vibration and noise is identified. Finally, the reference of vibration and noise is established using results of measurement.
구동식(D. S. Gu),김효중(H. J. Kim),정한얼(H. E. Jeong),김학은(H. E. Kim),최병근(B. K. Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
This paper was shown three equations. Two are the estimation equation of explosion noise, and the other is the decrease equation of the point-soundsource. In the near sea, the explosion works noise of built bridge was reckoned by three equation. And, before construct the bridge, the test explosion had been performed. The estimation noise that reckoned by three equation was compared with the test explosion noise of the built bridge. And the underwater noise that is the explosion works was calculated by the estimation noise. So, in this study, the heavy shock by the explosion works could produce a unfavorable effects to the fish.
정한얼(H. E. Jeong),김효중(H. J. Kim),구동식(D. S. Gu),최병근(B. K. Choi) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Recently, demands for the reduction of noise generated by transformers have been increasing. Accordingly the noise of transformer occasion displeasing to residents therefore the transformer needs to decrease of noise. One method of reduction such a noise is to build a free-standing enclosure of concrete and steel plates around the transformer. however, this method has some disadvantages, for example, a lage area is needed for equipment installation. In the paper, the vibration and noise effect which is transferred from reinforce channel to insulation panel generated by transformer have been identified for the several kinds of insulation panel and damping sheet experimentally.
교각 차량 통행에 의한 소음이 환경에 미치는 영향 평가
정한얼(H. E. Jeong),구동식(D. S. Gu),김효중(H. J. Kim),김학은(H. E. Kim),최병근(Choi B. K) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
The interesting of environment is recently increasing. the word about environment problem is not hard hearing by mass media, so the environment problem is big problem which is industry of today. The entire nation are into a one-day life zone to the tunnels and bridges construct increased by traffic network, but there are environment problem for increasing noise by vehicle traffic. therefor, in this research, the nuder water noise and air noise cause by traffic on the bridge are compared and analyzed by each measurement point.