Three-Dimensional Boundary Element Method and Finite Element Method Simulations Applied to Stray Current Interference Problems. A Unique Coupling Mechanism That Takes the Best of Both Methods

In this paper it will be demonstrated how a boundary element method (BEM) model based on so-called pipe elements and a finite element method (FEM) model that is limited in space can be coupled to study local effects on 3D structures in half space. The main idea is to replace the original 3D structur...

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Bibliographic Details
Published in:Corrosion (Houston, Tex.) Vol. 63; no. 6; pp. 561 - 576
Main Authors: Bortels, L., Dorochenko, A., Van den Bossche, B., Weyns, G., Deconinck, J.
Format: Journal Article
Language:English
Published: Houston, TX NACE International 01.06.2007
Subjects:
Applied sciences
Boundary conditions
Boundary element method
Computer simulation
Corrosion
Corrosion environments
Coupling
Direct current
Equivalence
Exact sciences and technology
Finite element analysis
Finite element method
Interference
Mathematical analysis
Mathematical models
Metal sheets
Metals. Metallurgy
Nonlinear programming
Parking facilities
Stray current
Submarine pipelines
Three dimensional models
Traction
Underground structures
Tube
Stray current
Modeling
Mechanism
pipe elements
Finite element method
stray current interference
Corrosion
Simulation
Direct current
underground car park
direct current- traction
Boundary element method
ISSN:0010-9312, 1938-159X
Online Access:Get full text
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Summary:In this paper it will be demonstrated how a boundary element method (BEM) model based on so-called pipe elements and a finite element method (FEM) model that is limited in space can be coupled to study local effects on 3D structures in half space. The main idea is to replace the original 3D structure with an “equivalent pipeline network,” which is used in the BEM model to calculate the complete direct current (DC)-traction interference problem. In the FEM code on the other hand, an “equivalent bounding box” that surrounds the complete 3D structure is defined. The potential distribution on this bounding box is calculated using the BEM model and applied as boundary condition for the actual FEM calculation on the original 3D structure. This new approach is applied and validated on a typical underground car park geometry made of steel sheet walls that exhibits stray current interference from a neighboring DC-traction system. It has been demonstrated that this unique coupling technique works very well and allows the modeling of local effects on 3D structures influenced by large DC-traction systems.
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ISSN:0010-9312
1938-159X
DOI:10.5006/1.3278407