Annual Progress Report for: Determination of Acoustic Parameters of Navy Coatings
1997
Jarzynski, Jacek | Caille, Gary | Doane, John
Currently there are three technical objectives: (1) Determination of the complex elastic moduli of the material over a large sample of the material. These moduli are a direct indication of the quality control of the Special Hull Treatments (SHT) production and application. They are also fundamental indicators of the acoustic performance of the treatment. As part of this measurement task, the feasibility of applying this technique to the shipyard quality assurance environment and to a laboratory scenario for investigation and characterization of commercial coating supplied by NAVSEA 92RC1 should be investigated. (2) Adaptation of the same system for detection of localized inclusions or discontinuities. It is believed that this technique could be used for analysis of seam integrity also. It is thought that this technique could be expanded for use on-site in a shipyard during application of the coating. This would allow for more timely analysis of the performance of the coating over a greater portion of the total surface of the vessel. (3) Extension of the above technique to make approximate measurements of the reflection coefficient of stress waves at the coating-hull interface. This reflection coefficient should be a direct measure of the local adhesion of the coating to the hull.
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