Publication
Title
Structural intensity analysis on irregular shells
Author
Abstract
A method is presented to assess the transmission path of vibration energy and to localize sources or sinks on shells with arbitrary shape, constant thickness and isotropic material properties. The derived equations of the structural intensity are based on the Kirchhoff-Love postulates and are formulated in terms of displacements, Lamé parameters, principal curvatures, and their partial derivatives with respect to the principal curvilinear coordinates. To test the accuracy of the method, two numerical models of thin shells with non-uniform curvatures were developed. The coordinates, displacements and principal curvature directions at the shell's outer surface were used to estimate the structural intensity vector fields and the energy density at the shell's middle surface. The power estimated from the surface integral of the divergence of the structural intensity over the source was compared to the actual power injected in the shell. The absolute error in both models did not exceed 1%, showing that, in theory, the method is able to handle the high-order spatial derivatives of the displacement and geometry data. The qualitative effect of varying the internal damping in the models on the energy transmission was also investigated.
Language
English
Source (journal)
Transactions of the ASME: journal of vibration and acoustics / American Society of Mechanical Engineers. - New York
Publication
New York : 2019
ISSN
1048-9002
Volume/pages
141:1(2019), 12 p.
Article Reference
011011
ISI
000452887200011
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Understanding functioning and evolution of bird middle ear mechanics through high-realism finite element modelling and system identification.
Powerflow in arbitrary shaped memebranes: the human eardrum: how does sound energy travel in the human eardrum?
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 01.08.2018
Last edited 24.08.2021
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