http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
화력발전소의 보일러 튜브 곡관 형상이 수명감소에 미치는 영향
김용찬(Yongchan Kim),정남근(Namgeun Jeong),백세현(Sehyun Beak) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
In this study, the numerical simulation has been performed for real power plant boiler tube bends specimen to determine the influence of shape and analysis result was compared with metallurgical investigation results for rupture damaged one. Using the common program, the change of first principle stress level and distribution in tube bend was compared. Analysis result showed the 300% stress increase in bend extrados external surface of the high heat flux zone and distribution pattern change. The cause of change was dominated by ovality. The calculated creep lifetime of high ovality bend was dropped below 3% of normal straight tube life time. And the metallurgical investigation result for rupture damaged tube bend from power plant manifest the relationship between stress change and rupture pattern. According this study, the effect of tube bend shape imperfection was understood.