Application of the Wave Propagation Approach to Sandwich Structures: Vibro-Acoustic Properties of Aluminum Honeycomb Materials
| Autor: | Diego Paderno, Candida Petrogalli, Edoardo Alessio Piana, Ulf Carlsson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
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) |
| Zdroj: | Applied Sciences; Volume 8; Issue 1; Pages: 45 |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app8010045 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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