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Application of the Wave Propagation Approach to Sandwich Structures: Vibro-Acoustic Properties of Aluminum Honeycomb Materials
- Source :
- Applied Sciences; Volume 8; Issue 1; Pages: 45
- Publication Year :
- 2018
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2018.
-
Abstract
- Sandwich structures are manufactured using multiple combinations of materials for core and laminates. The real performances are influenced by variability in the composing layers and even by the uncertainties introduced while bonding them together. Therefore, experimental tests are usually the preferred way to assess the most important parameters required to develop and to characterize the product, the main downsides lying in their cost and time consumption. This work explores a practical application of the wave propagation approach by means of a case study, in which some significant properties of an aluminum honeycomb panel are obtained starting from simple vibro-acoustic tests carried out on beam specimens. After determining the frequency-dependent bending stiffness function, the sound transmission loss is predicted and compared with the experimental results obtained in sound transmission suites. The same vibro-acoustic tests are used to estimate the core shear modulus. Finally, a parametric study is proposed to show how this technique can be effectively used in the early design stage, when producing physical samples is often impossible due to time and money constraints. The method proved to be a reliable and powerful tool in all the tested applications, providing good results with limited computational effort.
- Subjects :
- Sound transmission class
Computer science
Acoustics
Bending stiffness
Bending wave propagation
Sandwich panel
Sound transmission loss
02 engineering and technology
01 natural sciences
Shear modulus
0103 physical sciences
General Materials Science
010301 acoustics
Instrumentation
Parametric statistics
Fluid Flow and Transfer Processes
Process Chemistry and Technology
General Engineering
Function (mathematics)
021001 nanoscience & nanotechnology
Computer Science Applications
Core (optical fiber)
bending wave propagation
bending stiffness
sandwich panel
sound transmission loss
0210 nano-technology
Beam (structure)
Subjects
Details
- Language :
- English
- ISSN :
- 20763417
- Database :
- OpenAIRE
- Journal :
- Applied Sciences; Volume 8; Issue 1; Pages: 45
- Accession number :
- edsair.doi.dedup.....15f2d0e0cdbffd9cfe7caa018b3d4468
- Full Text :
- https://doi.org/10.3390/app8010045