断裂力学在转化管剩余寿命预测中的应用（续Ⅱ）

Application of fracture mechanics to prediction of residual life of reformer tube(continued Ⅱ)

用损伤分数的概念计算了转化管的临界裂纹长度；分别采用实验数据与能量率积分Ｃ￣＊关联法和Ｗｅｂｓｔｅｒ模型法对运行６３０００ｈ和８１０００ｈ的转化管进行了剩余寿命估算；分析了两种方法的实用性和局限性，从而指出了工程实际中适用的可靠的剩余寿命评价方法。

The critical crack length is calculated in terms of damage fraction. The residual lifehas been predicted by the correlation of experimental data with C￣* and Webster’s equation forthe reformer tube in service for 63 000 h and 81 000 h respectively. The applicability and theshortcoming of the two methods are investigated. A reliable and applicable residual lifeassessement method is proposed for the industrial application.