Analytical sound pressure level determination around a transformer using measured vibration velocity distribution
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| Title: | Analytical sound pressure level determination around a transformer using measured vibration velocity distribution |
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| Authors: | Petošić, Antonio, Petrović, Karlo, Župan, Tomislav |
| Source: | IET Conference Proceedings. 2023:857-861 |
| Publisher Information: | Institution of Engineering and Technology (IET), 2025. |
| Publication Year: | 2025 |
| Subject Terms: | spl analytical determination, one-third octave spectrum, noise radiation, incoherent summation |
| Description: | Tank surface vibration is radiated as noise to the surrounding medium, depending on the radiation efficiency of the tank wall material and the medium acoustic properties. In this paper, a one-third-octave spectrum of sound pressure level (SPL) is calculated analytically. The calculation is done at the chosen points around the transformer using the measured vibration velocity distribution at the tank surface for short-circuit (SC) test. The measured object is the 5 MVA transformer experimental model. The tank wall is treated as an incoherent radiator in the calculation method used for this problem. Incoherent sounds have random relative phases, which sum as scalar quantities on an energy basis. Each surface of the transformer tank is treated as a separate plane source so the analytical calculation can be applied. The summation of contributions at the calculation point is done only for the surfaces for which that point is in front, i.e., from 0° to 180°. The SPL around the transformer for SC operating condition is measured in the semi-anechoic chamber. Those measurements are compared with analytically determined SPL. |
| Document Type: | Article Conference object |
| Language: | English |
| ISSN: | 2732-4494 |
| DOI: | 10.1049/icp.2024.0688 |
| Accession Number: | edsair.doi.dedup.....844b8aad1581edf9a85e08055d6c38fa |
| Database: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstract: | Tank surface vibration is radiated as noise to the surrounding medium, depending on the radiation efficiency of the tank wall material and the medium acoustic properties. In this paper, a one-third-octave spectrum of sound pressure level (SPL) is calculated analytically. The calculation is done at the chosen points around the transformer using the measured vibration velocity distribution at the tank surface for short-circuit (SC) test. The measured object is the 5 MVA transformer experimental model. The tank wall is treated as an incoherent radiator in the calculation method used for this problem. Incoherent sounds have random relative phases, which sum as scalar quantities on an energy basis. Each surface of the transformer tank is treated as a separate plane source so the analytical calculation can be applied. The summation of contributions at the calculation point is done only for the surfaces for which that point is in front, i.e., from 0° to 180°. The SPL around the transformer for SC operating condition is measured in the semi-anechoic chamber. Those measurements are compared with analytically determined SPL. |
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| ISSN: | 27324494 |
| DOI: | 10.1049/icp.2024.0688 |