87-33: PROPELLER WAKE INDUCED STRUCTURE-BORNE INTERIOR NOISE

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 6695
Amount: $49,915.00
Phase: Phase I
Program: SBIR
Awards Year: 1988
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
2231 Faraday Ave #103, Carlsbad, CA, 92008
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 DR C THOMAS SAVELL
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THIS PROPOSAL OUTLINES A STUDY TO ESTABLISH A UNIFIED PREDICTION MODEL FOR THE CONTRIBUTION TO AIRCRAFT INTERIOR CABIN NOISE RESULTING FROM WING MOUNTED PROPELLER, WAKE INDUCED, STRUCTURE-BORNE NOISE TRANSMITTED THROUGH THE WING. THE METHOD USES: (1) A VELOCITY DEFECT MODEL REPRESENTING THE VISCOUS WAKE BEHIND A TWISTED AND LEANED PROPFAN BLADE; (2) STANDARD ACOUSTIC SOURCE MODELING METHODS TO DESCRIBE THE WING VIBRATION AND PRESSURE LOADING PERTURBATION RESULTING FROM THE WAKE SLAPPING THE WING; AND (3) FINITE ELEMENT, ACCOUSTIC STRUCTURE INTERACTION ANALYSIS TO PREDICT THE VIBRANCY ENERGY TRANSMISSION THROUGHTHE WING STRUCTURE, EXCITATION OF THE REST OF THE AIRCRAFT STRUCTURE, AND THE RESULTING NOISE RADIATION TO THE INTERIOROF THE AIRCRAFT CABIN.

* Information listed above is at the time of submission. *

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