NASA SBIR 2004 Solicitation


SUBTOPIC TITLE:Airframe Systems Noise Prediction and Reduction
PROPOSAL TITLE:Hybrid Prediction Method for Aircraft Interior Noise

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
202 North Curry Street, Suite 100
Carson City ,NV 89703 - 4121
(858) 350 - 0057

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Bryce   Gardner
202 North Curry Street, Suite 100
Carson City, NV  89703 -4121
(858) 350 - 0057

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
The goal of the project is research and development of methods for application of the Hybrid FE-SEA method to aircraft vibro-acoustic problems. This proposal discusses the development and application of new methods of structural-acoustic analysis in order to address existing problems in aircraft interior noise prediction. The proposed methods are based on a hybrid modeling strategy that combines Finite Element Analysis (FEA) and Statistical Energy Analysis (SEA). Over the past five years, Vibro-Acoustic Sciences has devoted a considerable research effort towards the development of a framework for combining these two analysis methods. Recent research carried out by over the past two years has resulted in the development of a rigorous solution to this problem. The resulting Hybrid approach has been derived in general terms and validated for a number of simple structural-acoustic problems. However, the method has not yet been applied to aircraft interior noise prediction. A number of candidate aircraft interior noise problems have been identified which would benefit greatly from the use of the Hybrid method. The aims of the research described in this proposal are therefore: (i) to demonstrate the application of the Hybrid method to a number of existing aircraft interior noise problems, (ii) to develop the method to ensure it contains sufficient functionality to address practical aircraft interior noise problems and (iii) to demonstrate the value of the method in the prediction and reduction of noise in airframe systems.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
? Aircraft interior noise research
? Rotorcraft interior noise research
? Manned spacecraft and on-orbit habitability research (e.g. International Space Station)
? Spacecraft random vibration environment prediction
? Launch vehicle acoustic and vibration environment prediction
? On-orbit spacecraft vibration environment
? Random vibration analysis of large optical space science platforms

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
? Commercial aircraft acoustic design ? flight deck, crew workstations and passenger cabin(s)
? Commercial aircraft insulation, isolation and damping package weight management and optimization
? Commercial rotorcraft - flight deck safety and passenger comfort
? Automobile interior noise ? sound package treatments, structure-borne noise, boom noise, etc.
? Heavy equipment acoustic design
? Noise and vibration analysis of other transport vehicles ? railcars, ships, submarines, etc.
? Sonar detectability of submarines ? underwater noise radiation
? Consumer appliances in the home or office environment
? Architectural/construction acoustics and noise control applications
? Acoustic materials design and research
? Recreational vehicles ? noise prediction/reduction

Form Printed on 08-01-05 13:52