Implementation of Non-Linear Energy Sink in Damping and Harvesting of Acoustic power_ Crimson Publishers

Implementation of Non-Linear Energy Sink in Damping and Harvesting of Acoustic power by Reza Moezzi in Evolutions in Mechanical Engineering

Non-linear Energy Sinks (NES) is a new approach in the field of vibration isolation which allows an irreversible transfer of vibration energy from a primary linear system (e.g. a mass -spring where a harmonic excitation is applied) to a secondary non-linear system (e.g. a mass -spring with variable compliance and a damper) where the energy is finally transferred and dissipated. The phenomenon taking place in NES is referred to as Non-linear Energy Transfer (NET). Main applications of NET in the field of engineering range from aero-elastic instabilities control to seismic mitigation in civ il engineering to drill-string systems stabilization. Recent applications in the field of acoustics have seen the use of a thin visco-elastic membrane as NES, where a high amount of the acoustic power provided by waves propagating in a duct is dissipated in NES. However, the use of NES is new in the field of applied acoustics. For this reason, the objectives of this research proposal are investigating the potentiality of NES for both harvesting and dampening the acoustic power.


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