摘要
通过有限元软件建立转子热固耦合模型,着重对燃气轮机鼓筒进行热应力分析。研究表明,启动过程和停机过程中的热应力最大值区域均集中在燃机鼓筒的内外倒角处,且应力值均已超过材料的屈服极限。对鼓筒进行结构优化的研究后发现,若要同时减小圆角处的热应力值,在材料和加工允许的范围内,最好同时增大鼓筒靠近压机端的内外圆倒角R1和R2的值。
Rotor thermosetting coupling model was established via finite element software and the model was focusing on thermal stress analysis of the gas turbine drum. The study had shown that the maximum thermal stresses are concentrated at the inner and outer chamfer areas of the gas turbine drum during startup and shutdown and the magnitude of stress exceeds the yield limit of the material. It was found after structural optimization of the drum, if the thermal stresses at the filleted corners need to be reduced at the same time, the best way was to increase simultaneously the inner and outer chamfer values R1 and R2 at the drum side nearby the press end provided it was within the allowed ranges of the materials and the processes.
出处
《上海电气技术》
2015年第1期31-35,共5页
Journal of Shanghai Electric Technology
关键词
鼓筒
热应力
热固耦合
结构优化
Drum
Thermal Stress
Thermal-structure Coupling Analysis
Structure Optimization
