Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications

Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications

Bibliographic Details
Main Author: Suresh, Saurabh
Language:English
Published: University of Cincinnati / OhioLINK 2011
Subjects:
Acoustics
Transmission Loss
Laminated Glass
Wind Noise
Porous Layer
Coincidence Frequency
Transfer Matrix
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin1305893843
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin13058938432021-08-03T06:14:35Z Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications Suresh, Saurabh Acoustics Transmission Loss Laminated Glass Wind Noise Porous Layer Coincidence Frequency Transfer Matrix This study analyzes the sound transmission characteristic of various laminated glass designs with application to motor vehicles. The laminated glasses contain a combination of solid, air and/or porous layers. The porous interlayer is filled with Polyvinyl Butyral (PVB) that serves as an acoustic damper. To model the physics behind the sound transmission losses of the fluid, solid and porous layers, acoustic noise transfer matrices that relate the dynamic characteristics of two interlayer points are used for modeling each medium in the laminated glass. The porous model also includes the effect of the variation in porosity on Poisson’s ratio. The Poisson’s ratio is used in calculations involving the wave number as well as the bulk modulus and hence the variation in the Poisson’s ratio affects the acoustic wave propagation through the porous layer. Furthermore, an interface matrix is introduced, which defines the dynamic interaction at the interface of every layer. A viscoelastic model is used for the solid layers and the Biot’s theory is applied to describe the flow through the porous layer. The addition of a fluid layer, like air, yields an interesting phenomenon of two coincidence dips in the laminated structure. The lower frequency dip is due to the air layer acting as part of the system damping medium and the other higher frequency dip occurs where air acts as a separation medium and decouples the layers in the glass. The analysis reveals difference in the effects of porosity on the behaviors of the low and high frequency dips Finally, a set of parametric studies are performed to observe the transmission loss characteristic due to changes in glass thickness and porous layer. 2011-09-26 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1305893843 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1305893843 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection NDLTD
language English
sources NDLTD
topic Acoustics
Transmission Loss
Laminated Glass
Wind Noise
Porous Layer
Coincidence Frequency
Transfer Matrix
spellingShingle Acoustics
Transmission Loss
Laminated Glass
Wind Noise
Porous Layer
Coincidence Frequency
Transfer Matrix
Suresh, Saurabh
Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications
author Suresh, Saurabh
author_facet Suresh, Saurabh
author_sort Suresh, Saurabh
title Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications
title_short Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications
title_full Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications
title_fullStr Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications
title_full_unstemmed Transmission Loss Analysis of Laminated Glass with Porous Layers using Transfer Matrices for Automotive Applications
title_sort transmission loss analysis of laminated glass with porous layers using transfer matrices for automotive applications
publisher University of Cincinnati / OhioLINK
publishDate 2011
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin1305893843
work_keys_str_mv AT sureshsaurabh transmissionlossanalysisoflaminatedglasswithporouslayersusingtransfermatricesforautomotiveapplications
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