金属学报  2011, Vol. 47 Issue (9): 1159-1166    DOI: 10.3724/SP.J.1037.2011.00039

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基于随机过程的镍基690合金点蚀建模方法

周炳海, 翟子青

1) 同济大学机械工程学院, 上海 201804 2) 上海交通大学机械工程与动力学院, 上海 200240

STOCHASTIC PROCESS-BASED MODELING METHOD FOR PITTING CORRSION OF Ni-BASED ALLOY 690

ZHOU Binghai, ZHAI Ziqing

1) School of Mechanical Engineering, Tongji University, Shanghai 201804 2) School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240

周炳海 翟子青. 基于随机过程的镍基690合金点蚀建模方法[J]. 金属学报, 2011, 47(9): 1159-1166.
, . STOCHASTIC PROCESS-BASED MODELING METHOD FOR PITTING CORRSION OF Ni-BASED ALLOY 690[J]. Acta Metall Sin, 2011, 47(9): 1159-1166.

摘要 参考文献 相关文章 Metrics 全文: PDF(1287 KB)   摘要: 以随机过程理论为基础, 结合实验数据和分析结果, 提出了基于非齐次Poisson过程和非定态Gamma过程的点蚀萌发和生长建模方法, 建立了一套系统的关于镍基690合金蒸汽发生器传热管点蚀失效的实验方法、建模方法和仿真方法. 对由点蚀引起的镍基690合金蒸汽发生器传热管破损失效的衰退过程进行了有效仿真, 得到了不同工作环境下镍基690合金蒸汽发生器传热管的寿命概率分布. 结果表明, 在不考虑传热管内具体流体动力学和辐照因素的前提下, 本文建立的点蚀引起的衰退过程模型可有效地模拟镍基690合金蒸汽发生器传热管的点蚀萌发和生长, 对预测其寿命和制定相关的维修计划具有重要的参考价值. 关键词 ： 镍基690合金,  点蚀,  随机过程,  过程建模,  Monte Carlo模拟     Abstract：Pitting corrosion is one of the most serious modes of localized corrosions that can cause deteriorations of Ni-based alloy 690 steam generator tubes. Because the initiation and propagation of pitting are subject to interactions of different factors, it is a stochastic process. It is almost impossible to draw any deterministic models for formations of the processes. To efficiently model the formation process of pitting, firstly, experimental schemes of pitting formations were designed. Based on stochastic theory, combined experimental data and analyzing results, a modeling method was presented with stochastic processes. Namely, non-homogeneous Poisson process (NHPP) was used to model the pitting initiation process and non-stationary Gamma model was used to set up pitting propagation model. A systemic method was built for pitting corrosion failure of the Ni-based alloy 690 tubes, including experimental method, modeling method and simulation method. Finally, the stochastic degradation failure of the Ni-based alloy 690 tubes was simulated. The probability distribution of the lifespan of the Ni-based alloy 690 tubes was obtained under different working environments. The results showed that the proposed modeling method is valid to analyze the initiation and propagation of pitting of the tubes according to different combinations of modeling parameters. It is important for the lifespan prediction and development of relevant maintenance plans of the tubes. Key words： Ni-based alloy 690    pitting corrosion    stochastic process    process modeling    Monte Carlo simulation 收稿日期: 2011-01-17      基金资助: 国家自然科学基金项目71071115及国家高技术研究发展计划项目2009AA043403和2009AA043000资助 作者简介: 周炳海, 男, 1965年生, 教授 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 周炳海 翟子青 44.8K 链接本文: https://www.ams.org.cn/CN/10.3724/SP.J.1037.2011.00039      或      https://www.ams.org.cn/CN/Y2011/V47/I9/1159 [1] Park I G. Corros Sci Technol, 2002; 31: 6 [2] Joseph R. Electrocorrosion and Protection of Metals. Amsterdam: Elsevier, 2008: 13 [3] Datla S V, Jyrkama M I. Nucl Eng Des, 2007; 238: 1771 [4] Zapp P E. Corrosion, 1996; 96: 24 [5] Frankel G S. J Electrochem Soc, 1998; 145: 2186 [6] Turnbull A L, McCartney N. Corros Sci, 1996; 48: 2084 [7] Shibata T. Corrosion, 1996; 52: 813 [8] Hong H P. Corrosion, 1999; 55: 10 [9] Aziz P M. Corrosion, 1956; 12: 495 [10] Provan J W, Rodriguez E S. Corrosion, 1989; 45: 178 [11] Valor A, Caleyo F. 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