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On the calculation and control of structural intensities to reduce Sound Transmission through thin walled structures

Rose, Michael and Kokott, Alexander (2019) On the calculation and control of structural intensities to reduce Sound Transmission through thin walled structures. 30th International Conference on Adaptive Structures and Technologies (ICAST2019), 07.-11. Okt. 2019, Montréal, Kanada.

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Abstract

In lightweight and stiff structures like aircraft fuselages, the structure-born noise is often the dominating part in noise transmission. To efficiently use methods like active vibration reduction in order to attenuate this unwanted sound, suitable sensor information must be provided. In recent research, a new focus has been established on so-called structural intensities, a vector information on the transmitted sound energy per unit area as control target to efficiently block sound transmission within the structure. This paper discusses methods to calculate and control structure intensities for panel like thin structures. For control purposes there is a need to at least estimate these quantities from real-time sensor data. In order to better understand the behavior of the structure with respect to sound transmission, offline calculations based on enhanced measurements e.g. from a laser scanning vibrometer are also discussed. In addition, the resulting power flow information can be used to adapt sensor and actuator positions.

Item URL in elib:https://elib.dlr.de/134423/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Der Beitrag wird Ende 2019 in das Journal of Intelligent Material Systems & Structures (JIMSS) unter der Sonderrubrik ICAST 2019 zwecks Veröffentlichung eingereicht.
Title:On the calculation and control of structural intensities to reduce Sound Transmission through thin walled structures
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Rose, MichaelMichael.Rose (at) dlr.dehttps://orcid.org/0000-0002-8311-3638
Kokott, AlexanderAlexander.Kokott (at) dlr.dehttps://orcid.org/0000-0002-0082-649X
Date:8 October 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:structural intensity, structure borne noise, active control
Event Title:30th International Conference on Adaptive Structures and Technologies (ICAST2019)
Event Location:Montréal, Kanada
Event Type:international Conference
Event Dates:07.-11. Okt. 2019
Organizer:Concordia University, Montréal
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Human factors and safety in Aeronautics
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Rose, Dr.rer.nat. Michael
Deposited On:11 Mar 2020 16:30
Last Modified:11 Mar 2020 16:30

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