High frequency sound and vibration modelling methods become undoubtedly more and more important for the automotive, aerospace and other industries. SEA offers a useful tool for predicting the transmission of noise and vibration at high frequencies through mechanical structures such as cars, helicopters. This paper concentrates on the application of the PIM (Power Injection Method) measurements, which from the basis of experimental Statistical Energy Analysis. It will be shown that carefully worked out variance analyses are necessary when it comes to accurate and reliable SEA vibration predictions. The paper will present an analytical algorithm to extend the classical experimental identification of the SEA parameters through prediction of their variances. As an example, the Power Injection Method and the analytical variance analysis procedure are applied to an irregular box type structure, which consist of seven flat Aluminium side walls and one acoustic space. The accuracy of SEA model of the box-structure will be examined using effective yet uncomplicated criteria.
An experimental-analytical SEA identification and applied validation criteria of a box type structure
Eine experimentell-analytisch-statistische Energieuntersuchung und angewandte Bewergungskriterien an einer Struktur mit einem geschlossenen Körper
ISMA, ISMA, Tools for Noise and Vibration Analysis, 19 ; 1 ; 431-446
1994
16 Seiten, 10 Bilder, 4 Tabellen, 11 Quellen
Aufsatz (Konferenz)
Englisch
Automobilindustrie , Raumfahrttechnik , Produktentwicklung , experimentelle Untersuchung , analytische Untersuchung , Schwingungssystem , Geräuschquelle , Hochfrequenz , Betriebsverhalten , Modellstruktur , statistische Analyse , Algorithmentheorie , Simulationsmodell , Energiebilanz , Messverfahren , Leistungsbewertung
Validation of handling criteria
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