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이종환(Jong Hwan Lee),남대호(Dae-Ho Nam),손정호(Jung Ho Son),배종국(Jong Gug Bae) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
??2-stroke marine diesel engine has generally one exhaust valve and three fuel injection nozzle which are key component for engine’s performance and combustion. Fuel injection and exhaust valve driving system are driven by rotating of camshaft. Rotation of crank shaft drives the cam shaft through gear train that is composed of 3~4 gear wheels. Gear column supporting the gear wheel has to bear against the dynamics forces by engine running as well as gearing forces. In this paper, structural analysis for engine structure and fatigue strength assessment of welded joint is shown. Repeatedly full cyclic simulation during one cycle is performed to investigate the structural behavior of engine. Fatigue analysis is carried out based on IIW using submodeling technique to obtain more detailed stress distribution.
이태경(Lee, Tae-Kyoung),주원호(Joo, Won-Ho),배종국(Bae, Jong-Gug) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.8
In this paper, the experimental study on the identification of noise sources and noise transmission paths was carried out for the cabin noise control of construction equipment. In order to investigate noise and vibration characteristics of cabin structure, sound absorption, transmission, and radiation tests were performed using cabin assembly models. The noise/vibration source levels were obtained from the real cabins of wheel loader and excavator. Using transfer functions of cabins and real cabins' source data, cabin noise was decomposed into airborne and structureborne noise transmissions. Finally noise sources and major transmission paths were successfully identified for wheel loader and excavator's cabins.