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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Selection of an adequate model of a piezoelastic support for structural control in a beam truss structure
 Mao, Z. ; Society for Experimental Mechanics SEM, Bethel: Model Validation and Uncertainty Quantification, Vol.3 : Proceedings of the 38th IMAC, A Conference and Exposition on Structural Dynamics 2020, Houston, Texas, February 1013, 2020 Cham: Springer Nature, 2020 (Conference proceedings of the Society for Experimental Mechanics series) ISBN: 9783030487782 (Print) ISBN: 9783030476380 (Online) ISBN: 9783030476397 ISBN: 9783030476373 S.4149 
 International Modal Analysis Conference (IMAC) <38, 2020, Houston/Tex.> Conference and Exposition on Structural Dynamics <2020, Houston/Tex.> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer LBF () 
 piezoelastic support 
Abstract
Axial and lateral loads of lightweight beam truss structures e.g. used in automotive engineering may lead to undesired structural vibration that can be reduced near a structural resonance frequency via resonant piezoelectric shuntdamping. In order to tune the electrical circuits to the desired structural resonance frequency within a modelbased approach, an adequate mathematical model of the beam truss structure is required. Piezoelastic truss supports with integrated piezoelectric stack transducers can transfer the axial and lateral forces and may be used for vibration attenuation of single beams or whole beam truss structures. For usage in a single beam test setup, the piezoelastic support’s casing is clamped rigidly and is connected to the beam via a membranelike spring element that allows for rotation as well as axial and lateral displacements of the beam. In this contribution, the piezoelastic support is integrated into a twodimensional beam truss structure comprising seven beams, where its casing is no longer clamped rigidly but is subject to axial, lateral and rotational displacements. Based on the previously verified and validated model of the single beam test setup, two different complex mathematical models of the piezoelastic support integrated in the twodimensional beam truss structure are derived in this contribution. The two mathematical models differ in their number of degrees of freedom for the piezoelastic support as well as in the assumption of rigid or compliant casing. By comparing numerically and experimentally determined structural resonance frequencies and vibration amplitudes, the model that more adequately predicts the truss structure’s vibration behavior is selected on basis of the normalized root mean squared error. For future works, the more adequate model will be used to tune electrical circuits for resonant piezoelectric shuntdamping in a threedimensional truss structure.