A method for estimating the service life of a boiler reheater pipe
By constructing transient thermal boundary conditions and metallographic degradation parameters, combined with a fatigue-creep interactive damage model, the problem of life assessment bias in existing technologies is solved, and accurate prediction of boiler reheater pipe life and quantitative characterization of aging state are achieved.
CN122413634APending Publication Date: 2026-07-17INNER MONGOLIA HELIN POWER GENERATION CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INNER MONGOLIA HELIN POWER GENERATION CO LTD
- Filing Date
- 2026-06-05
- Publication Date
- 2026-07-17
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Figure CN122413634A_ABST
Abstract
本发明提供一种锅炉再热器管道寿命测算方法，属于锅炉受热面寿命评估技术领域，其可至少部分解决现有技术中再热器管道寿命测算未将瞬态热‑结构应力谱、金相退化导致的材料参数折减以及疲劳‑蠕变交互损伤统一到同一计算链条中导致测算偏差较大的问题。本发明包括：采集运行工况数据并构建瞬态热边界条件，通过流‑固‑热耦合计算得到管壁瞬态温度场；基于所述瞬态温度场计算时变应力谱；获取金相退化参数并计算材料性能退化系数；将所述退化系数代入疲劳‑蠕变交互损伤模型计算累积损伤量；根据所述累积损伤量和损伤增长率计算剩余寿命。本发明使剩余寿命计算同时反映实际运行工况和材料当前老化状态。
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