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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.
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.
정재환(J. H. Jeong),임장익(J. I. Lim),김효중(H. J. Kim),최병근(B. K. Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The pulsation of a reciprocating type hydrogen compressor is occurred from the mechanism and this pulsation makes much noise and vibration. To reduce this pulsation, snubber is usually installed on that. To maintain the efficiency in the reciprocating type hydrogen compressor, the pulsation and vibration should be reduced. so it is necessary to research about the characteristic of pulsation and vibration. Therefore in this paper, the vibration characteristic of the snubber is analyzed in the base of optimized modeling condition through the flowing analysis of existing snubber. The prototype of reciprocating type hydrogen compressor is analyzed with numerical analysis. And making sure the present condition of hydrogen compressor through measurement of vibration and noise, and then it is established that the vibration characteristic data base on numerical analysis which will be develope.
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.
김학은(H. E. Kim),이현섭(H. S. Lee),권수종(S. J. Gwon),박재필(J. P. Park),최병근(B. K. Choi),정용길(Y. G. Jung) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Liquefied Natural Gas takes up six hundredths of the volume of natural gas, which makes storage and transportation much easier. To send out natural gas via a pipeline network across the nation, high-pressure LNG pumps supply highly compressed LNG to high-pressure vaporization facilities. The Number of high-pressure LNG pumps determined the send-out amount in LNG receiving terminal. So it is main equipment at LNG production process and should be maintained on best conditions. In this paper, to find out the cause of high beat vibration at cryogenic pumps, vibration and motor current analysis have been performed. And high beat vibration of cryogenic pumps could be reduced due to the modification of motor rotor.