Damping determination by the half power bandwidth method for a rectangular flat plate with bitumen damping layer application
| Autor: | Daniel Feszty, Balázs Vehovszky, Marcell Ferenc Treszkai |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
damping loss factor
Materials science Loss factor 02 engineering and technology 01 natural sciences vibroacoustics Viscoelasticity 0203 mechanical engineering 0103 physical sciences TJ1-1570 viscoelastic layer General Materials Science Point (geometry) Mechanical engineering and machinery 010301 acoustics Statistical energy analysis business.industry Mechanical Engineering Power bandwidth Structural engineering statistical energy analysis 020303 mechanical engineering & transports Distribution (mathematics) Test case Asphalt business bitumen damping layer |
| Zdroj: | Journal of Vibroengineering, Vol 23, Iss 5, Pp 1267-1277 (2021) |
| ISSN: | 2538-8460 1392-8716 |
| DOI: | 10.21595/jve.2021.21938 |
| Popis: | Damping Loss Factor (DLF) is an important input parameter in Statistical Energy Analysis (SEA) simulations, therefore its accurate determination via measurement is crucial from simulation accuracy point of view. This paper presents a methodology for the accurate measurement of DLF via the Half Power Bandwidth Method (HPBM) for three test cases: a) a rectangular steel plate, b) the same plate with viscoelastic bitumen sheets imposed on the middle of plate and c) the same plate with the viscoelastic bitumen sheets placed randomly. The aim of the different bitumen layer applications was to develop a methodology for representing them in Statistical Energy Analysis, since this simulation technique takes into account only the coverage of the damping layers but not their distribution over a panel. Measurement of the DLF in random locations on the plate gave the appropriate parameters for the simulation. Measurement results were then applied in SEA simulations, which showed good agreement with the experimental results in all test cases, with the maximum difference of only 2 dB. |
| Databáze: | OpenAIRE |
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