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Sound radiation properties of complex modes of vibration

Unruh, Oliver and Sinapius, Michael (2013) Sound radiation properties of complex modes of vibration. Noise Con 2013, 26. - 28. Aug. 2013, Denver, USA.

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Abstract

The sound radiation of vibrating plates is often characterized by modal radiation efficiencies. In most cases it is assumed that the spatial distribution of damping is homogeneous and structural modes of vibration are real valued. With the increasing use of high-performance, lightweight structures and rising acoustic requirements the demand of damping treatments is growing. For reasons of weight minimization, these treatments may be distributed locally at some critical locations of the structure, so that the assumption of homogeneity is violated. In this case the dynamics of the system within the resonances is no longer dominated by pure standing waves, but also by a superposition with travelling waves. These phenomena are generally known as complex modes of vibration. This paper summarizes the results of a numerical study on sound radiation properties of complex modes of vibration.

Item URL in elib:https://elib.dlr.de/83472/
Document Type:Conference or Workshop Item (Paper)
Title:Sound radiation properties of complex modes of vibration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Unruh, OliverUNSPECIFIEDUNSPECIFIED
Sinapius, MichaelUNSPECIFIEDUNSPECIFIED
Date:August 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Sound radiation, vibrating plates, complex modes
Event Title:Noise Con 2013
Event Location:Denver, USA
Event Type:international Conference
Event Dates:26. - 28. Aug. 2013
HGF - Research field:Aeronautics, Space and Transport, Aeronautics, Space and Transport
HGF - Program:Aeronautics, other
HGF - Program Themes:Aircraft Research (old), other
DLR - Research area:Aeronautics, Aeronautics
DLR - Program:L AR - Aircraft Research, L - no assignment
DLR - Research theme (Project):L - Structures & Materials (old), L - no assignment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Böhringer-Thelen, Isolde
Deposited On:25 Jul 2013 13:47
Last Modified:25 Jul 2013 13:47

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