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조한권(Han-Kwon Cho),이지하(Jeeha Lee),송봉환(Bong-Hwan Song),김동률(Dong-ryul Kim) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10
궤도틀림관리의 기준이 되는 설계선형은 다짐(M.T.T.) 작업 시 인적오류에 의한 작업값 입력 및 선로개량, 개인별 작업처리 방식 등 다양한 원인에 의해 변화되고 있는 실정이다. 일반적으로 궤도검측차 및 인력 검측은 설계선형 입력 후 측정값과의 차이를 분석하는 절대 편차법을 적용하며 최대-최소값(Peak Value) 허용범위를 초과한 개소만을 산출한다. 이로 인해 궤도 유지보수 작업량의 증가 및 궤도틀림 잔존율이 지속적으로 높아지는 경향이 있다. 따라서 본 연구에서는 측정값 개소를 기준으로 전후 18m, 24m, 18+12m, 24+18m, 42+30m 의 다양한 거리 별로 이동평균법에 의한 설계선형을 보정하여 궤도틀림을 산출하였다. 산출된 검측결과를 분석하여 해당구간에서의 선로유지보수에 가장 적합한 이동평균 연산을 제시하고자한다. Usually, track irregularity values are changed because of human error and individual work processing method after track maintenance like track stabilizer by M.T.T and so on. Generally, track inspection by machine or hand is put out exceed standard that peak value method and adapting absolute deviation. Because of this will be make trend that useless track maintenance work and residual track irregularity steadily grow up. This study put out track irregularity values by moving average (M.A) adapted virtual and calibrated designtrack from various track section and measure method that used various moving average template(18m, 24m, 18+12m, 24+18m , 42+30m). Finally, this paper suggests that which one is suitable moving average length to measure for each speed rate band.
박희범,서진관,조한권,정기섭 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It was required to improve the low frequency vibration characteristics of a current production car. For the sake of design study, a well correlated FE model was necessary. This paper describes the process of how to build FE model and to correlate it with test result from BIW to total vehicle.<br/>
와류 분무 노즐에 의해 형성되는 액적들의 균일도에 액체의 점도가 미치는 영향
이상용,김인구,조한권 대한기계학회 1989 대한기계학회논문집 Vol.13 No.3
본 연구에서는 분사액체의 점도가 분무액적의 평균크기뿐만 아니라 표준편차 의 역수적 개념을 가지는 균일도에 주는 영향을 실험을 통하여 살펴보았다. Effect of liquid viscosity was studied experimentally on the drop size distributions of the liquid sprays from swirl atomizers. Glycerine-Water mixtures were used as test fluids for the experiments. Drop sizes of the liquid sprays were measured with the light scattering method. The concept of the standard deviation was introduced to represent the degree of uniformity of the drop size distributions. Experimental results show that the spray drops become coarser and less uniform with the liquid of higher viscosity. The effect of viscosity on the Sauter mean diameter and the standard deviation appeared to be more significant with the lower injection pressure. It was also confirmed that the Sauter mean diameter increases with the increase of the liquid viscosity and with the decrease of the injection pressure.
김성훈(Sunghun Kim),신진만(Jinman Shin),조한권(Hangweon Jo),권용준(Yongjun Kwon),임옥택(Ocktaeck Lim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Noises from diesel engine are the major issues for noise pollution as well as affect customers’ purchasing needs to vehicles powered by diesel engine. This research tries to find the major noise factor which it is generated in the diesel engine through the environmental influence analysis of the dynamo room, the combustion pressure, vibration acceleration, injector injection rate, Etc related on exhaust system and engine major factors. This research is the second opinion series pater of “The Study on the Noise contributing factors extraction of The Passenger Diesel Engine[Ⅰ]” in 2010.