| PROPOSAL NUMBER: | 03-II A2.04-9320 |
| PHASE-I CONTRACT NUMBER: | NNL04AB15P |
| SUBTOPIC TITLE: | Airframe Systems Noise Prediction and Reduction |
| PROPOSAL TITLE: | Vehicle Interior Noise Prediction Using Energy Finite Element Analysis |
SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Comet Technology Corporation
1796 Stonebridge Drive North
Ann Arbor ,MI 48108 - 8593
(734) 998 - 0126
PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Satha Raveendra
raveendra@sbcglobal.net
1796 Stonebridge Drive North
Ann Arbor ,MI 48108 -8593
(734) 998 - 0126
U.S. Citizen or Legal Resident: Yes
TECHNICAL ABSTRACT (LIMIT 200 WORDS)
It is proposed to develop and implement a computational technique based on Energy Finite Element Analysis (EFEA) for interior noise prediction of advanced aerospace vehicles that will expand NASA's noise prediction capability at the early stage of design process. In many situations, aerospace structures are subjected to high frequency mechanical and/or acoustic excitations. Presently, noise performances of these products are determined experimentally, which is not feasible at the early design stage or by using computational simulation technique based on Statistical Energy Analysis (SEA). SEA requires high level of analyst expertise and in some instances, testing of the product's components. An alternative computational simulation technique for high frequency vibration and noise prediction based on EFEA conceptually offers several unique features. EFEA can predict the spatial variation of the energy in structures and the acoustic cavities. Local power input and damping treatments can also be modeled in EFEA. More importantly, EFEA is based on extensively used and comprehensively developed finite element method. The use of finite element method for both low and high frequency noise and vibration problems will provide the users a unified framework for the resolution of problems where the frequency spans a wide range.
POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
The software product developed under this proposed work will enable NASA to predict interior noise using a more versatile tool than currently exists for noise prediction. As an improved alternative to currently used modeling software, an EFEA modeling software will increase capability and reduce the cost of modeling for aerospace structures.
POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
Reduction of noise is of major concern in many industries. For example, in automotive industry, the increased use of telematic devices require reduced interior noise environment. By integrating the EFEA software developed here with appropriate optimization algorithm, one can optimize the interior noise environment. Since EFEA is a general numerical tool for noise reduction, it can be easily adapted for noise control in other industries since the same features that are of interest to NASA will be of interest to aerospace, automotive, naval, trucking and consumer product industries.