Session: VIB-03-03: Dynamics & Waves in Solids and Metamaterials III

Paper Number: 97930

97930 - Resonance-Based Mechanical Vibration Enhancement for Non-Contact Vibration Monitoring 

Vibration monitoring has broad applications in areas such as disaster warnings, human health monitoring, and non-destructive testing. In our work, we perform simulation and experimental studies to explore resonance-based mechanical oscillations of membranes to enhance the sensitivity of non-contact vibration detection. Our prototype device is composed of a thin layer of rubber membrane with a mass loaded at its center. The membrane is mounted on the top surface of a rigid cylindrical tube. The bottom of the tube is supported by a rigid plate. Sinusoidal vibrations with different frequencies are set as the input at the bottom plate of the cylindrical tube in both simulation and experiment. When the input frequency is near the eigenfrequency of the mass-loaded membrane, the vibration magnitude of the membrane will be largely enhanced compared to the input vibration of the bottom plate. The enhancement is shown to be around 200 times in simulation and more than 10 times in experiment. The eigenfrequency of the membrane can be adjusted from several hertz to kilohertz by changing the device parameters such as the diameter/thickness of the membrane, the loaded mass, the membrane material, and/or membrane tension. The widely adjustable working frequency and flexible choices of shape and material extend the potential of using the device in various vibration monitoring applications.

Presenting Author: Dajun Zhang University of Wisconsin Madison

Presenting Author Biography: Dajun is currently pursuing his doctoral degree in Electrical Engineering at the University of Wisconsin-Madison. His research interest is in acoustic functional devices, biomedical imaging systems, metamaterial, and their engineering applications.

Authors:

Dajun Zhang University of Wisconsin Madison
Chu Ma University of Wisconsin-Madison