FEA based sound power estimation with non-equidistant frequency steps

Matthias Klaerner, Mario Wuehrl, Lothar Kroll, Steffen Marburg

Publikation: KonferenzbeitragPapierBegutachtung

4 Zitate (Scopus)

Abstract

The radiated sound power is a common objective for the design of thin-walled and lightweight components with dynamic loading. For the numeric determination there are different approaches based on the normal surface velocity e.g. the equivalent radiated sound power. Thus, the FEA of structural dynamics in frequency domain is used for an efficient power estimation. In detail, steady state dynamics based on modal superposition offer less computational time and the opportunity of composite modal damping. The number of frequency steps is optimised using mode based increments with biasing leading to non-equidistant step sizes throughout the frequency domain. In addition, the number of frequency steps is depending on the number of modes that can be changing during optimisation processes with structural or material modifications. Thus, there are different aspects to consider ensuring the comparability of FEA based sound power estimates. In this study, we present an approach for the determination of the total sound power in the frequency domain based on the power spectral density. The estimate is independent from the number of modes and thus allows the comparison of different structural components, materials or shapes. Moreover, this approach opens the prospects of accessing optimisation algorithms with sound power objectives.

OriginalspracheEnglisch
Seiten5447-5454
Seitenumfang8
PublikationsstatusVeröffentlicht - 21 Aug. 2016
Veranstaltung45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 - Hamburg, Deutschland
Dauer: 21 Aug. 201624 Aug. 2016

Konferenz

Konferenz45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016
Land/GebietDeutschland
OrtHamburg
Zeitraum21/08/1624/08/16

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