SBIR-STTR Award

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Dedicated 3-D Acoustic Multilayer Response Model
Award last edited on: 12/17/2014

Sponsored Program
SBIR
Awarding Agency
DOD : Navy
Total Award Amount
$178,239
Award Phase
2
Solicitation Topic Code
N85-090
Principal Investigator
Robert S Dunham

Company Information

Anatech International Corporation

5435 Oberlin Drive
San Diego, CA 92121
   (858) 455-6350
   help@anatech.com
   www.anatech.com
Location: Multiple
Congr. District: 52
County: San Diego

Phase I

Contract Number: N60921-85-C-0249
Start Date: 8/13/1985    Completed: 00/00/00
Phase I year
1985
Phase I Amount
$47,979
The safety of submarines requires that they be designed acoustically quiet to avoid detection. One method to reduce acoustic emission is to surround the hull with a viscoelastic layer. In order to access the effectiveness of these viscoelastic layers, it is necessary to determine the three-dimensional (3-d) surface complex impedance and acoustic loss as a function of frequency for a steady state harmonic input. This project will provide for the accurate assessment of the effectiveness of these viscoelastic layers by developing an efficient, modular, user-friendly, dedicated 3-d finite element code that is capable of determining the complex surface impedance as a function of the steady state driving frequency and accurate modeling techniques for these unique geometries.

Phase II

Contract Number: N60921-85-C-0249
Start Date: 6/1/1987    Completed: 6/1/1989
Phase II year
1985
Phase II Amount
$130,260
The safety of submarines requires that they be designed acoustically quiet to avoid detection. One method to reduce acoustic emission is to surround the hull with a viscoelastic layer. In order to access the effectiveness of these viscoelastic layers, it is necessary to determine the three-dimensional (3-d) surface complex impedance and acoustic loss as a function of frequency for a steady state harmonic input. This project will provide for the accurate assessment of the effectiveness of these viscoelastic layers by developing an efficient, modular, user-friendly, dedicated 3-d finite element code that is capable of determining the complex surface impedance as a function of the steady state driving frequency and accurate modeling techniques for these unique geometries.