Lateral Vibration Attenuation of a Beam with Piezo-Elastic Supports Subject to Varying Axial Tensile and Compressive Loads

• Published in: Model Validation and Uncertainty Quantification, Volume 3 pp. 1 - 8
• Main Authors: Götz, Benedict, Platz, Roland, Melz, Tobias
• Format: Book Chapter
• Language: English
• Published: Switzerland River Publishers 2017; Springer International Publishing AG; Springer International Publishing
• Edition: 1
• Series: Conference Proceedings of the Society for Experimental Mechanics Series
• Subjects: Axial load; Beam; Dynamics & vibration; Piezo-elastic support; Reliability engineering; Resonant shunt; Testing of materials; Vibration attenuation; Beam; Vibration attenuation; Resonant shunt; Piezo-elastic support; Axial load
• DOI: 10.1007/978-3-319-54858-6_1
• ISBN: 3319548573; 3319855034; 9783319855035; 9783319548579
• ISSN: 2191-5644

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.