http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박상필(Sangpil Park),오환섭(Hwansup Oh),박종찬(Jongchan Park),박철희 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.4
At this research, we examined probability of light bulb's life span value and prediction on purpose to inquire out the span of repeat velocity as fracture probobility by executing the fatigue test, which is considered property of Tungsten filament's thermal fatigue used as an automobile bulb. As a result, we can confirm what the most suitable solution is weibull distribution and log normal distribution. Tungsten filament's span gets longer as the fatigue repeat velocity gets shorter. And, repeat span is about 15%~40% shorter than sequence life span.
박상필(Sangpil Park),오환섭(Hwansup Oh),허민구(Mingu Hur) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, we analysis a cemented mirror for 3 mount material in steady - state using 'Finite elements analysis' for the purpose of making the cemented mirror of Lyman- solar telescope which is main payload of the STSAT-2 that is planned to blastoff the latter half of the year in 2005, be the minimum thermal stress and thermal transformation. we assume just two cases of temperature changes, which are worst cold case and worst hot case, according to an orbit character of satellite. As a result, the stress and transformation on commissure caused by the difference of the coefficient of thermal expansion is inquired out in order of Al-6063-T6, Ti-6AI-4V, SuperInvar besides stress on commissure and displacement of out 'of commissure is the maximum. Consequently It is safe to use Invar-fraction, But In the case of using AI-6063- T6 for satisfying mass requirement, is required more effectively thermal control system.