摘要
针对锅炉汽包本身的缺陷和裂纹会在压力和温度载荷作用下扩展而导致汽包失效问题,依据《压力容器缺陷评定规范》,运用有限元方法计算出了某125 MW锅炉在启动、运行和停机3种工况下汽包危险区域的应力分布及随时间变化的规律,采用CTOD方法计算了该处临界裂纹尺寸与年裂纹扩展量.
When boiler runs under certain pressure and temperature, the disfigurement anct crack will propagate, resulting in failure of the boiler drum. According to the Assess criterion of Pressure Container＇s Disfigurement, the maximal stress value in the dangerous area for 125MW boiler drum and its change within certain time frame under different working conditions are found out by means of finite element method. The allowable length of crack is calculated with COD mode and the yearly crack-propagating value is predicted and analyzed.
出处
《武汉理工大学学报（交通科学与工程版）》
2006年第2期235-238,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金资助项目(批准号:50275109)
