Design Cathodic Protection Ground-bed Arrangement with Finite Element Analysis Method
A more flexible grounding resistance calculation method,based on finite element analysis (FEA) method,is suggested,which is especially suitable for optimization cathodic protection (CP) ground-bed arrangement.As compared with traditional grounding resistance evaluation method,which is only suitable for the case of each anode rod in a straight line,the FEA method can calculate grounding resistance of ground-bed at any arrangement.Moreover,a realistic soil resistance rate,usually varying with depth,can be included in calculation model.The detailed steps for this method can be summarized as follow: building a 3D geometric model according to general design,meshing the geometric model,setting reasonable boundary conditions,solving and post-solving the grounding resistance with ohmic law.To further explain this procedure,a realistic CP ground-bed displacing project is presented,which includes displacing the original CP ground-bed firstly and re-designing a new ground-bed within a limited area (5m×30m).A new CP ground-bed design,compared with traditional design,2×7,14 anode rods dispersed in two parallel groups,are calculated firstly.The results show that this design can not meet the grounding resistance requirement.Another 4 designs,with anode rods arranged as 2×6,2×8,2×9,3×6 are calculated respectively.Finally,the design 2×8 is recommended from the view of economy and practicability.
Cathodic protection Ground-bed FEA Grounding resistance
Wuxi Bi Wei Kong Weibin Wang Zhiyuan Xue Zhan Su Hongyuan Chen
PetroChina Pipeline R&D Center, No.51 Jinguang Road, Langfang, China, 065000 School of Energy and Power Engineering, Jiangsu University of Science and Technology, No.2 Mengxi Ro China Petroleum Pipeline Engineering Company Limited, No.146 Heping Road, Langfang, China, 065000
国际会议
北京
英文
132-140
2012-10-14（万方平台首次上网日期，不代表论文的发表时间）