基于非线性累积准则的汽轮机转子可靠性定寿

Steam turbine rotor′s management of service life based on reliability and nonlinear damage rule

采用可靠性设计方法 ,对汽轮机转子的非线性损伤累积准则进行了研究 .在对一个实例的应用中 ,分别采用线性和非线性损伤累积准则评价其寿命损耗过程 ,结果表明 ,线性损伤累计准则与非线性准则具有较大差别 ,线性准则更偏于安全 ;同时 ,应用非线性准则确定的检修探伤期更加符合实际损伤的发展情况 .基于此 ,提出了一种基于非线性累积准则确定转子疲劳损伤极限的方法 。

The reliability is discussed using nonlinear damage rule. The application using nonlinear and linear damage rules show that the modal using nonlinear one is more conformity with reality, and the final results are more conservative. A new method of service life′s management is introduced. This method can be used to evaluate the entire damage of low cycle fatigue life of steam turbine rotors and provide an optimized overhaul interval.