Design of a Mechanical System for Energy Transfer between Acoustic Fields by Frictional Contact Nonlinearity
Abstract
The aim of this work is to investigate the energy transfer between acoustic fields, through a contact interface
by exploiting the friction nonlinearities. In particular, the work is focused on the development of a device able to
transfer the vibrational energy from a known primary vibrational field to a secondary field with a different frequency
content.
The device is composed by a main resonator capturing the energy from the primary vibrational field anda secondary
resonator, excited by the large band excitation at the frictional interface and radiating the secondary vibrational field.
The main resonator has been designed as a compliantsystem able to provide a translational oscillationof the contact
surface, allowing for maintaining constant the normal load at the interface.
The numerical design of the device has been developed together with its experimental dynamic characterization.
Experimental tests, developed on a dedicated set-up, showed the reliability of the device to perform the energy transfer
between the vibrational fields.