Potential reduction of the inertial mass of tuned vibration absorbers by means of mechanical impedance matching

• Published in: Journal of sound and vibration Vol. 442; pp. 90 - 107
• Main Authors: Valiente-Blanco, I., Perez-Diaz, J.L., Cristache, C.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 03-03-2019; Elsevier Science Ltd
• Subjects: Absorbers; Dynamics; Gear ratios; Impedance matching; Magnetic; Maintenance costs; Mechanical design; Mechanical impedance; New technology; Passive damping; Reduction; Structural damping; Tuned mass damper; Vibration; Vibration absorber; Vibration absorber; Structural damping; Passive damping; Magnetic; Tuned mass damper; Impedance matching; Dynamics; Mechanical design
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1016/j.jsv.2018.10.043

In this paper, a new technology for vibration isolation based on impedance matching using a linear magnetic gear is presented. Using that operational principle, a prototype of an Impedance Matching Tuned Vibration Absorber (Z-TVA) is designed, manufactured and tested. An inertial mass is coupled to the fast-moving stage of the linear magnetic gear, increasing its motion proportionally to the square of the gear ratio, and therefore its effectiveness as a vibration absorber.
A theoretical model is postulated and validated with tests at a component level, demonstrating a promising solution for drastically reducing the required mass and installation and maintenance cost. A potential reduction of the required mass of a vibration absorber of more than an order of magnitude is predicted.