主蒸汽管道负蠕变及蠕变变形寿命损耗量修正

Negative Quantity of Creep Deformation and Correction of Creep Deformation Life Loss in Main Steam Piping

本文分析了主蒸汽管道蠕变变形出现负值的原因,是支吊架状况不正常引起的。按管子最大蠕变变形计算寿命损耗不合适。根据总应变能理论,作者提出按管子累积蠕变变形量计算寿命损耗量。

In this paper the negative quantity of creep deformation in main steam piping was discussed. Its reason is that the working state of bearing and hanger isn't normality, therefore it isn't suitable that calculate creep life loss in maximal creep deformation of steam pipe. According to the total strain energy failure theory author provides calculate formula of creep Life loss in creep deformation accumulation of steam pipe.