摘要
对某超超临界汽轮机组中压转子稳定运行过程中的高温蠕变强度进行了有限元分析,得到了转子在稳定运行工况下的温度场、应力场和应变场,并考虑了多轴效应对蠕变强度的影响,分析了特征点连续蠕变损伤度演化规律.结果表明:多轴效应对蠕变强度有明显的影响;在稳定运行工况下的初期,转子发生了明显的应力重新分配现象;应力重新分配因素对连续蠕变损伤度演化规律有影响.
High-temperature creep strength of the intermediate-pressure （IP） rotor in an ultra-supercritical steam turbine was numerically investigated using Abaqus, so as to obtain the temperature, stress and strain field, under steady-state operation conditions of rotor, during which the influence of multiaxial effect on the creep strength was taken into consideration, and the continuous damage evolution pattern on characteristic point was analyzed. Results show that the mutiaxial effect has a significant influence on the creep strength; stress redistribution happens during initial stage of steady-state operation of rotor, which impacts the continuous damage evolution pattern.
出处
《动力工程学报》
CAS
CSCD
北大核心
2015年第1期25-29,共5页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(50906049)
关键词
超超临界汽轮机
中压转子
有限元分析
蠕变强度
多轴效应
应力重新分配
连续蠕变损伤度
ultra-supercritical steam turbine
IP rotor
finite element analysis
creep strength
multiaxialeffect
stress redistribution
continuous damage
