IMPROVEMENT OF ALGORITHM FOR REGIONAL CATHODIC PROTECTION MODEL

J Chin Soc Corr Pro

1998, Vol. 18

Issue (3): 221-226 DOI:

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IMPROVEMENT OF ALGORITHM FOR REGIONAL CATHODIC PROTECTION MODEL

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Abstract It is a quite complicated and heavy work to calculate potential distribution in a regional cathodic protection system with boundary element method (BEM). The node numbers of the model for calculation can be reduced and computer operation time can be shortened by using cylindrical element discreting method, if the geometric shape of the object to be protected is suitable for partitioning into cylindrical elements and the potentials on cross-section periphery are approximately equal. In previous work, the variable error polyhedron method was used to optimize the model. Since the fitting of the cathodic polarization curve was simplistic, the stability of the optimization was poor. In this paper, the piecewise linear fitting is applied, thus the stability of the optimizing process is improved. This improved calculation method has been used for the cathodic protection design of some oil well cases.

Key words: Cathodic protection Boundary element method (BEM) Cylindrical element Piecewise linear fitting

Received: 25 June 1998

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MENG Xian-ji WU Zhong-yuan LIANG Xu-wei ZHUANG Xin-guo (Tianjin University; Tianjin 300072)(Tianjin Institute of Textile Science and Technology)YUAN Zhen-kun LIU Yan-hua (DaGang Petroleum Exploration Bureau). IMPROVEMENT OF ALGORITHM FOR REGIONAL CATHODIC PROTECTION MODEL. J Chin Soc Corr Pro, 1998, 18(3): 221-226.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I3/221

1 梁旭巍.区域性阴极保护计算机辅助优化设计研究[硕士学位论文],天津:天津纺织工学院,1993
2 庄新国.区域性阴极保护优化设计方法的研究[硕士学位论文],天津:天津大学研究生院,1994
3 孟宪级,庄新国,梁旭巍.天津大学学报,1996第29卷,增刊:130～136
4 Wrobel L C, Brebbia C A. Axisymmetric Potential Problems, In Rencent Advances in BEM, London, England: Computational Mechanics Publications 1980. 77-89
5 Brebbia C A. The Boundary Element Method for Engineering, London: Pentech Press, 1978g

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