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Lateral vibration attenuation of a beam with piezo-elastic supports subject to varying axial tensile and compressive loads

: Götz, Benedict; Platz, Roland; Melz, Tobias


Barthorpe, R. ; Society for Experimental Mechanics -SEM-, Bethel:
35th IMAC, a Conference and Exposition on Structural Dynamics 2017. Proceedings. Vol.3: Model validation and uncertainty quantification : Garden Grove, California, January 30-February 2, 2017
Cham: Springer International Publishing, 2017 (Conference proceedings of the Society for Experimental Mechanics series)
ISBN: 978-3-319-54857-9 (Print)
ISBN: 978-3-319-54858-6 (Online)
Conference and Exposition on Structural Dynamics <35, 2017, Garden Grove/Calif.>
Fraunhofer LBF ()
lateral vibration; piezo-elastic support; axial tensile; compressive load

In this paper, vibration attenuation of a beam with circular cross-section by resonantly shunted piezo-elastic supports is experimentally investigated for varying axial tensile and compressive beam loads. Varying axial beam loads manipulate the effective lateral bending stiffness and, thus, lead to a detuning of the beams resonance frequencies. Furthermore, varying axial loads affect the general electromechanical coupling coefficient of transducer and beam, an important modal quantity for shunt-damping. The beam’s first mode resonance frequency and coupling coefficient are analyzed for varying axial loads. The values of the resonance frequency and the coupling coefficient are obtained from a transducer impedance measurement. Finally, frequency transfer functions of the beam with one piezo-elastic support either shunted to a RL-shunt or to a RL-shunt with negative capacitance, the RLC-shunt, are compared for varying axial loads. It is shown that the beam vibration attenuation with the RLC-shunt is less influenced by varying axial beam loads.