摘要
在涉及埋地管线、海岸和海洋设施等的半无限域阴极保护系统数值计算中,半无限域的截断边界大小对电位分布结果有着不可忽视的影响。本文采用全浸直管模型运用ANSYS有限元软件进行数值实验,研究了在一定介质的电阻率、管径和阴阳极间距条件下,相对深度、相对宽度和相对长度变化对电位分布的影响,同时探讨了电阻率、管径和阴阳极间距对边界截取的影响。结果表明,随着相对深度和相对宽度的增加,截断边界对电位分布的影响呈指数下降,而相对长度的影响很小。电阻率增大、管径增大和阴阳极间距减小能使临界截断边界尺寸减小。
In the numerical calculation of cathodic protection systems of buried pipelines, facilities in coast and ocean etc,the truncated boundary of semi-infinite domain innegligibly affected polarization distribution result. Some numerical experiments for totally immersed pipeline were conducted by finite element software ANSYS. A research was carried on to estimate how did relative depth, relative width and relative length influence the polarization distribution under the condition that medium-electric resistivity,caliber and distance between cathode and anode were unchangeably. Meanwhile, influences of resistivity, caliber and distance betw een cathode and anode to the boundary selection were taken into account in this article. It turned out that the extent of influence of truncated boundary size to polarization distribution were decreased with increasing of relative depth and relative width exponentially, whereas the influence of relative length could be negligible. That the size of truncated boundary in need were decreased with the increasing of resistivity and caliber, and with the decreasing of distance between cathode and anode.
出处
《全面腐蚀控制》
2014年第2期76-81,共6页
Total Corrosion Control
关键词
阴极保护
半无限域
截断边界
相对深度
相对宽度
cathodic protection
semi-infinite domain
truncated boundary
relative depth
relative width
