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Active vibration damping in structural aluminum die castings via piezoelectricity - technology and characterization

Aktive Schwingungskompensation in Aluminium-Druckgussbauteilen durch piezoelektrische Aktuatoren und deren Charakterisierung
 
: Schwankl, Matthias; Kimme, Simon; Pohle, Carina; Drossel, Welf-Guntram; Körner, Carolin

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Advanced engineering materials 17 (2015), Nr.7, S.969-975
ISSN: 1438-1656
ISSN: 1615-7508
Englisch
Zeitschriftenaufsatz
Fraunhofer IWU ()
piezo; high-pressure die casting; AlSi9Cu3; active noise cancellation; vibration damping

Abstract
Piezoelectric modules are integrated in structural aluminum components (AlSi9Cu3(Fe)) using high-pressure die casting for damping purposes. Investigations using X-ray analysis indicate a damage free integration and good casting quality despite very harsh casting conditions. FE simulations provide information about the mode shapes of the casting and could be confirmed by investigations using a 3D laser scanning vibrometer (LSV). Frequency sweeps show that many modes are stimulated by applying voltage to the piezoelectric module. It is demonstrated, how an actively induced vibration signal in the casting is reduced by creating a phase-shifted counteracting vibration with the help of the integrated module.

: http://publica.fraunhofer.de/dokumente/N-352228.html