数值模拟在阴极保护中的应用进展

发布时间：2018-03-31 14:06

本文选题：阴极保护　切入点：数值模拟　出处：《材料科学与工艺》2016年04期

【摘要】：阴极保护是控制金属构件腐蚀的有效方法之一.随着阴极保护以及计算机技术的发展,数值模型在阴极保护体系设计和优化过程中得到了越来越广泛的应用.本文介绍了3种数值模型计算方法及有限元计算过程中边界条件的处理,综述了数值模型计算的发展现状以及面临的问题,阐述了有限元法和边界元法的优缺点.对比分析发现:边界元法可以使整个问题的维度降低一维,减少了计算量,提高精度,简化了建模过程.有限元法要求区域是有界的,可以对阴极保护体系进行三维分析,但计算量较大.边界元法适用于无限域、半无限域问题,有限元法的剖分灵活,更加适用于边界复杂以及求解域内电位场分布变化比较大的体系.在实际应用过程中,如何根据实际情况合理地采用有限元和边界元相结合的方法,发挥两种方法各自优点是阴极保护数值优化技术今后的一个发展方向.
[Abstract]:Cathodic protection is one of the effective methods to control corrosion of metal components.With the development of cathodic protection and computer technology, numerical model has been widely used in the design and optimization of cathodic protection system.This paper introduces three kinds of numerical model calculation methods and the treatment of boundary conditions in the course of finite element calculation, summarizes the development and problems of numerical model calculation, and expounds the advantages and disadvantages of finite element method and boundary element method.It is found that the boundary element method can reduce the dimension of the whole problem, reduce the computational cost, improve the accuracy and simplify the modeling process.The finite element method requires the region to be bounded and can be used to analyze the cathodic protection system.The boundary element method is suitable for infinite and semi-infinite domain problems. The finite element method is more suitable for the system with complex boundary and large change of potential field distribution in the domain.In the process of practical application, how to reasonably adopt the finite element method and the boundary element method according to the actual situation, and give play to the respective advantages of the two methods is a developing direction of the numerical optimization technology of cathodic protection in the future.
【作者单位】：海洋化学理论与工程技术教育部重点实验室(中国海洋大学);中国海洋大学化学化工学院;
【基金】：国家自然科学基金资助项目(41576076)
【分类号】：TG174.41

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