High Frequency Elastic Analysis Tool Navy SBIR FY2011.2 Sol No.: Navy SBIR FY2011.2 Topic No.: N112-156 Topic Title: High Frequency Elastic Analysis Tool Proposal No.: N112-156-0788 Firm: Weidlinger Associates, Inc. 375 Hudson St FL 12 New York, New York 10014-3656 Contact: Jeffrey Cipolla Phone: (212) 367-3000 Web Site: http://www.wai.com Abstract: In order to analyze, design and optimize submarine and UUV coatings, sonar decouplers and windows, the Navy requires an analytical approach which is fast, accurate, and has high physical fidelity at all frequencies of interest. Such an analytical methodology exits for wave propagation in coated, ribbed, three-dimensional elastic layered plates excited by acoustic plane waves, as described by Hull. Weidlinger Associates, Inc (WAI) proposes to develop a robust software tool which transitions this analytical solution as a documented, supported product available to a wide community of Navy users in Phase I. Parametric study support, e.g. for hundreds to thousands of cases, will be implemented. In later phases, WAI will extend the commercialization of the software to additional engineering application markets. WAI will leverage its considerable experience in underwater acoustics, strongly coupled dynamics, transducer design software, GUI development, and software development for Navy customers and applications. Benefits: Analytical solutions augment design processes for complex systems, in which experiments, prototypes, and numerical analyses also play important roles. Prototype experiments offer physical resolution and fidelity, at the expense of volume of data and at high relative monetary cost. Numerical analyses approach the physical resolution of experiments, in that system geometry and material arrangements can be resolved, but mathematical approximations are necessarily made. Numerical analyses provide a much higher density of data than an experiment, usually at a much lower cost, but it is often the case that individual numerical analyses may take hours or days. Analytical solutions complement experiments and numerical analyses by offering high mathematical accuracy, low cost, and high speed at the expense (usually) of some physical fidelity: in order to derive an analytical solution, geometric, material, and boundary condition simplifications usually must be made. Sonar system and coating assessments are the primary use-case for the initial (Phase I Base) implementation of the proposed WAI software tool, consistent with the analyses of Hull2, which models ribbed plates, acoustic fluids, and single-layer coatings. The Phase I Base WAI tool implementing this model will have a GUI interface and run under the MATLAB framework. Return