Author(s): E. A. Hogan, J. E. McElman, E. J. Lemieux, M. S. Krupa,
V. G. DeGiorgi & A. L. LeDoux
In the past 20 years, the US Navy has used the physical scale modeling (PSM)
technique to design effective cathodic protection (CP) systems for the ships
underwater hull, nickel-aluminum-bronze props and other hull components.
more recent years, a number of computational techniques have been devised in
an attempt to fulfill this purpose.
Physical models have proven highly adept at
ICCP design, since modeled information provides a direct relationship to the
actual hull and can be scaled up directly because of confidence in the physically
Boundary element (BE) models have been correspondingly
devised that mimic actual hull design and even the PSM layout, but because the
BE method is a computational methodology, the calculated data requires
systematic validation with a physical analog to insure confidence in the control
BE literature has discussed design issues regarding mesh layout,
intrinsic geometric complexities, accuracy of material response input, the
predictive engineering design capability for zonal response, and assessment of
electric field response.
It does not significantly discuss the accuracy of the BE
model calculated work predictive design capability, without the need for
“tweaking,” and ultimately a rigorous validation of both the mesh and resultant
system design technique.
This paper presents validation requirements, for any
BE model, that is inherently robust enough to be used for CP design and control,
and a proposed four-point methodology that will allow for the comprehensive
validation of the BE model to predict the ICCP control responses and system
boundary element, BEM, cathodic protection, ICCP, validation plan.
Size: 523 kb
Paper DOI: 10.2495/ECOR070111
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