Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Methods for Aircraft Noise and Vibration Analysis

Gustavsson, Mats LU (1999) In TVSM-3000
Abstract (Swedish)
Aircraft noise control engineering is a challange both for experimentally based methods and for numerical analysis methods. Usually noise control installations are designed based on engineering judgement in combination with results from in-flight testing, rather than with nummerical methods, due to the absence of reliable and accurate models.
For turbo-prop aircraft, such as the Saab 340 and Saab 2000, the low-frequency tonal noise generated by the propellers is a major reason for passenger discomfort. Two effective methods of reducing this propeller noise are tuned vibration absorbers/dampers and active noise control. The efficiency of both of these two methods is, to a great extent, determined by placement of the damper/absorber or... (More)
Aircraft noise control engineering is a challange both for experimentally based methods and for numerical analysis methods. Usually noise control installations are designed based on engineering judgement in combination with results from in-flight testing, rather than with nummerical methods, due to the absence of reliable and accurate models.
For turbo-prop aircraft, such as the Saab 340 and Saab 2000, the low-frequency tonal noise generated by the propellers is a major reason for passenger discomfort. Two effective methods of reducing this propeller noise are tuned vibration absorbers/dampers and active noise control. The efficiency of both of these two methods is, to a great extent, determined by placement of the damper/absorber or active actuator (structural exciter or loudspeaker). Finding appropriate locations for such installations from experiments requires extensive testing, both in-flight and on ground. If alternative design methods requiring less, or ideally no, testing could be utilized this would allow significant cost reduction and the possibility of concurrent design for the noise control installations.
That is the motivation for this study on methods for aircraft acoustic and structural vibration analysis.
(Less)
Please use this url to cite or link to this publication:
author
supervisor
organization
publishing date
type
Thesis
publication status
published
subject
in
TVSM-3000
issue
TVSM-3035
pages
81 pages
publisher
Division of Structural Mechanics, LTH
ISSN
0281-6679
language
English
LU publication?
yes
id
ef1d879c-9d8c-4b76-a4ee-e44d284ad6b5
date added to LUP
2023-08-16 16:06:28
date last changed
2023-10-16 09:48:40
@misc{ef1d879c-9d8c-4b76-a4ee-e44d284ad6b5,
  abstract     = {{Aircraft noise control engineering is a challange both for experimentally based methods and for numerical analysis methods. Usually noise control installations are designed based on engineering judgement in combination with results from in-flight testing, rather than with nummerical methods, due to the absence of reliable and accurate models.<br/>For turbo-prop aircraft, such as the Saab 340 and Saab 2000, the low-frequency tonal noise generated by the propellers is a major reason for passenger discomfort. Two effective methods of reducing this propeller noise are tuned vibration absorbers/dampers and active noise control. The efficiency of both of these two methods is, to a great extent, determined by placement of the damper/absorber or active actuator (structural exciter or loudspeaker). Finding appropriate locations for such installations from experiments requires extensive testing, both in-flight and on ground. If alternative design methods requiring less, or ideally no, testing could be utilized this would allow significant cost reduction and the possibility of concurrent design for the noise control installations.<br/>That is the motivation for this study on methods for aircraft acoustic and structural vibration analysis.<br/>}},
  author       = {{Gustavsson, Mats}},
  issn         = {{0281-6679}},
  language     = {{eng}},
  note         = {{Licentiate Thesis}},
  number       = {{TVSM-3035}},
  publisher    = {{Division of Structural Mechanics, LTH}},
  series       = {{TVSM-3000}},
  title        = {{Methods for Aircraft Noise and Vibration Analysis}},
  url          = {{https://lup.lub.lu.se/search/files/155018181/web3035.pdf}},
  year         = {{1999}},
}