OPTIMIZATION STUDY AND PANEL PARAMETER STUDY FOR NOISE RADIATION REDUCTION OF AN AIRCRAFT PANEL EXCITED BY TURBULENT FLOW
Abstract
The noise and vibration in an aircraft cabin during cruise conditions is mostly caused by external flow excitations from the turbulent boundary layer (TBL). The TBL causes the fuselage panels on the aircraft to vibrate. These vibrations radiate sound energy in the form of noise. Therefore, it is of great interest to determine which aircraft panel parameter is most sensitive in decreasing the amount of radiated sound power and how to optimize these parameters to reduce the noise into the aircraft cabin. An analytical model was created and validated using Matlab that calculates the acceleration power spectral density, which is proportional to radiated sound power (RSP). A sensitivity study was performed on the panel parameters, to determine the percent change in acceleration power spectral density (PSD), vs. the percent change in seven different panel parameters: panel thickness, material density, panel width and length, Elasticity modulus, Poisson’s ratio, and damping ratio. An analytical method to optimize an aircraft panel is presented, by changing the panel properties, in order to reduce the acceleration PSD of the panel caused by the TBL. It is shown that panel thickness and panel density are the most consistent and sensitive parameters at, reducing the acceleration PSD, at different octave bands in the human hearing range.
Additional Files
Published
How to Cite
Issue
Section
License
Author Licensing Addendum
This Licensing Addendum ("Addendum") is entered into between the undersigned Author(s) and Canadian Acoustics journal published by the Canadian Acoustical Association (hereinafter referred to as the "Publisher"). The Author(s) and the Publisher agree as follows:
-
Retained Rights: The Author(s) retain(s) the following rights:
- The right to reproduce, distribute, and publicly display the Work on the Author's personal website or the website of the Author's institution.
- The right to use the Work in the Author's teaching activities and presentations.
- The right to include the Work in a compilation for the Author's personal use, not for sale.
-
Grant of License: The Author(s) grant(s) to the Publisher a worldwide exclusive license to publish, reproduce, distribute, and display the Work in Canadian Acoustics and any other formats and media deemed appropriate by the Publisher.
-
Attribution: The Publisher agrees to include proper attribution to the Author(s) in all publications and reproductions of the Work.
-
No Conflict: This Addendum is intended to be in harmony with, and not in conflict with, the terms and conditions of the original agreement entered into between the Author(s) and the Publisher.
-
Copyright Clause: Copyright on articles is held by the Author(s). The corresponding Author has the right to grant on behalf of all Authors and does grant on behalf of all Authors, a worldwide exclusive license to the Publisher and its licensees in perpetuity, in all forms, formats, and media (whether known now or created in the future), including but not limited to the rights to publish, reproduce, distribute, display, store, translate, create adaptations, reprints, include within collections, and create summaries, extracts, and/or abstracts of the Contribution.