Polynomial filters for camera-based structural intensity analysis on curved plates
Polynomial filters for camera-based structural intensity analysis on curved plates
Structural intensity can be used as a measure to detect energy sources, sinks, and transfer paths in solid structures. It provides a valuable design tool for vibro-acoustic problems next to modal analysis. However, it has been proven very challenging to determine structural intensity experimentally for the general case of curved plates. This is due to the requirement of an accurate measurement of the full 3D vibrational field and the computation of spatial gradients thereof. The purpose of this paper is to propose a mesh-free, inherently smoothing, polynomial filtering approach and investigate its application for structural intensity analysis on curved plates based on a stereo camera measurement. Numerical studies are conducted to determine reasonable algorithm parameters (discretization, fitting radius, and the number of iterations) and their performance for different levels of uncertainty and various displacement fields. The results show that, depending on the uncertainty in the measurement, optimal values of the algorithm parameters exist. Furthermore, it is essential to achieve a high signal-to-noise ratio in the camera measurement. The computation of structural intensity is validated experimentally on the case of a flat plate and a curved plate (mockup oil pan). For the flat plate, good agreement with a reference finite element simulation is obtained. While it is not possible to derive quantitative results for the mockup oil pan under realistic measurement uncertainty, qualitative conclusions can be still drawn.
Science & Technology, Technology, Engineering, Mechanical, Engineering, Structural intensity, Stereo camera, Experimental, Polynomial filtering, Curved plate, POWER-FLOW, 0905 Civil Engineering, 0913 Mechanical Engineering, 0915 Interdisciplinary Engineering, Acoustics, 4006 Communications engineering, 4017 Mechanical engineering
Egner, Felix Simeon
c69576c2-12b1-47d2-8a56-a4a977db5899
Sangiuliano, Luca
7d6ec00d-e1ab-4929-a69d-625a8d34706f
Boukadia, Régis Fabien
71b9d88a-69f1-4eca-a8d0-04d86dca842a
van Ophem, Sjoerd
bb3fb37e-577b-4152-86bc-2248943f882d
Desmet, Wim
deeaf534-7d83-4644-89cb-aa5fcfb5c73a
Deckers, Elke
d71b1075-d044-4486-b7af-9c2ee32f294f
2 March 2023
Egner, Felix Simeon
c69576c2-12b1-47d2-8a56-a4a977db5899
Sangiuliano, Luca
7d6ec00d-e1ab-4929-a69d-625a8d34706f
Boukadia, Régis Fabien
71b9d88a-69f1-4eca-a8d0-04d86dca842a
van Ophem, Sjoerd
bb3fb37e-577b-4152-86bc-2248943f882d
Desmet, Wim
deeaf534-7d83-4644-89cb-aa5fcfb5c73a
Deckers, Elke
d71b1075-d044-4486-b7af-9c2ee32f294f
Egner, Felix Simeon, Sangiuliano, Luca, Boukadia, Régis Fabien, van Ophem, Sjoerd, Desmet, Wim and Deckers, Elke
(2023)
Polynomial filters for camera-based structural intensity analysis on curved plates.
Mechanical Systems and Signal Processing, 193, [110245].
(doi:10.1016/j.ymssp.2023.110245).
Abstract
Structural intensity can be used as a measure to detect energy sources, sinks, and transfer paths in solid structures. It provides a valuable design tool for vibro-acoustic problems next to modal analysis. However, it has been proven very challenging to determine structural intensity experimentally for the general case of curved plates. This is due to the requirement of an accurate measurement of the full 3D vibrational field and the computation of spatial gradients thereof. The purpose of this paper is to propose a mesh-free, inherently smoothing, polynomial filtering approach and investigate its application for structural intensity analysis on curved plates based on a stereo camera measurement. Numerical studies are conducted to determine reasonable algorithm parameters (discretization, fitting radius, and the number of iterations) and their performance for different levels of uncertainty and various displacement fields. The results show that, depending on the uncertainty in the measurement, optimal values of the algorithm parameters exist. Furthermore, it is essential to achieve a high signal-to-noise ratio in the camera measurement. The computation of structural intensity is validated experimentally on the case of a flat plate and a curved plate (mockup oil pan). For the flat plate, good agreement with a reference finite element simulation is obtained. While it is not possible to derive quantitative results for the mockup oil pan under realistic measurement uncertainty, qualitative conclusions can be still drawn.
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More information
Accepted/In Press date: 25 February 2023
e-pub ahead of print date: 2 March 2023
Published date: 2 March 2023
Keywords:
Science & Technology, Technology, Engineering, Mechanical, Engineering, Structural intensity, Stereo camera, Experimental, Polynomial filtering, Curved plate, POWER-FLOW, 0905 Civil Engineering, 0913 Mechanical Engineering, 0915 Interdisciplinary Engineering, Acoustics, 4006 Communications engineering, 4017 Mechanical engineering
Identifiers
Local EPrints ID: 495153
URI: http://eprints.soton.ac.uk/id/eprint/495153
ISSN: 1096-1216
PURE UUID: d990ab0f-a320-44d9-9197-51d928ea3e03
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Date deposited: 30 Oct 2024 17:59
Last modified: 31 Oct 2024 03:15
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Contributors
Author:
Felix Simeon Egner
Author:
Luca Sangiuliano
Author:
Régis Fabien Boukadia
Author:
Sjoerd van Ophem
Author:
Wim Desmet
Author:
Elke Deckers
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