基于Norton-Bailey模型的高温设备316H不锈钢蠕变本构参数标定方法研究  

Calibration Method for the 316H Steel Creep Constitutive Parameters of High Temperature Equipment Based on Norton-Bailey Model

作　　者：梅朝庭 高付海[1] 李智 MEI Chao-ting;GAO Fu-hai;LI Zhi(China Institute of Atomic Energy)

机构地区：[1]中国原子能科学研究院

出　　处：《化工机械》2024年第5期747-752,共6页Chemical Engineering & Machinery

摘　　要：基于Norton-Bailey模型,开展316H不锈钢蠕变本构方程参数的第1、2阶段分阶段标定方法研究。为了合理确定两个阶段的分界点时间,提出一种用于阶段划分的数据处理方法,该方法通过给定一组应力相关的分界点时间初值,分阶段分别进行蠕变参数拟合标定,使用最佳平方逼近方法修正分界点时间,获取最佳蠕变参数。以ASME BPVC.Ⅲ.5—2021提供的316H不锈钢蠕变数据作为基础数据,拟合500、550℃时的Norton-Bailey蠕变本构方程参数,结果显示,拟合所得曲线与原数据一致性较好。The parameters of 316H stainless steel creep constitutive equation at different stages were calibrated based on Norton-Bailey model.With a view to determining the demarcation point of the first two stages legitimately,a data processing method was proposed.In this method,through presenting a set of stress-related initial demarcation time values,the creep parameters were fitted and calibrated in stages respectively,and the best square approximation method was used to correct the demarcation time to obtain best creep parameters.Based on the creep data provided by ASME BPVC.Ⅲ.5—2021,the creep parameters of 316 stainless steel at 500℃and 550℃were fitted respectively to show that,the fitted curves are in good agreement with the original data.

关 键 词：316H不锈钢 Norton-Bailey模型 蠕变分界点 多元线性回归 分段拟合 

分 类 号：TQ050.41[化学工程]