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A Two-Stage Model for Energy Transmission and Radiation Analysis of Laminated Composite Double-Leaf Structures

Sahu, Atanu and Niyogi, Arup Guha and Bhattacharya, Partha and Rose, Michael (2017) A Two-Stage Model for Energy Transmission and Radiation Analysis of Laminated Composite Double-Leaf Structures. Journal of Vibration and Acoustics, 139 (4), p. 13. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4036390. ISSN 1048-9002.

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Official URL: http://vibrationacoustics.asmedigitalcollection.asme.org/article.aspx?articleid=2618325


A two-stage numerical model is developed to understand the energy transmission characteristics through a finite double-leaf structure placed in an infinite baffle subjected to an external excitation and subsequently the sound radiation behavior of the same into the semi-infinite receiving side. In the first stage, a mobility-based coupled finite element - boundary element (FE-BE) technique is implemented to model the energy transmission from the primary panel to the secondary panel through an air gap. In the second stage, a separate boundary element (BE)based model is developed to estimate the sound power radiated by the radiating (secondary) panel into the receiving side which is assumed to be semi-infinite. The advantage of the proposed approach is that it is sufficient to mesh the structural panels alone, thereby reducing the problem dimensions and the difficulty in modeling. Moreover, the developed model can be easily implemented for structures made up of various constituent materials (isotropic or laminated composites) with complex boundary conditions and varying panel geometries. Numerical experiments are carried out for different material models by varying air-gap thicknesses and also by introducing alternate energy transmission path in terms of mechanical links and the obtained results are discussed.

Item URL in elib:https://elib.dlr.de/113586/
Document Type:Article
Title:A Two-Stage Model for Energy Transmission and Radiation Analysis of Laminated Composite Double-Leaf Structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rose, MichaelUNSPECIFIEDhttps://orcid.org/0000-0002-8311-3638UNSPECIFIED
Date:30 May 2017
Journal or Publication Title:Journal of Vibration and Acoustics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 13
Publisher:American Society of Mechanical Engineers (ASME)
Keywords:double-leaf structure, finite element, boundary element, laminated composite, acoustic
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 - Air Traffic Concepts and Operation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Rose, Dr.rer.nat. Michael
Deposited On:14 Aug 2017 09:45
Last Modified:08 Mar 2018 18:40

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