超临界汽轮机转子应力集中区域优化

The Optimization of the Stress Concentration Area of Supercritical Steam Turbine Rotor

转子作为汽轮机最重要的部件,在高温、高压等恶劣环境下,在转子应力集中区域,蠕变脆性断裂的危险性增大,这势必会造成转子寿命的损耗,进而缩短汽轮机的使用寿命。以超临界汽轮机高压转子作为研究对象,将转子寿命设为目标函数,对转子应力集中区域尺寸进行优化。运用热应力分析理论,针对应力集中区域在ANSYS软件中使用遗传算法来对转子形状进行优化,降低转子应力使得汽轮机运行更安全、可靠。

As the most important part, rotor is often in the awful environment. The location of stress concentration area will increase the dangerous of creep brittle fracture which will loss rotor life and shorten the service life of steam turbine. Making rotor of high pressure cylinder of supercritieal steam turbine is used as this research and setting rotor life as objective function and optimizing the size of rotor stress concentration area With the theory of thermal stress analysis uses genetic algorithm of ANSYS software to optimize the shape of the stress concentration area, reducing the stress of rotor and making operation more safe and reliable.