Enhancements of energy and Q-factor of a nonlinear resonator with increase in its losses

• A phenomenon that is paradoxical at first sight is studied: an appropriately-organized energy outflow from a resonator cavity results not in the attenuation of nonlinear vibrations but in their noticeable enhancement. An increase in the resonator Q-factor and in the energy accumulated in it is well pronounced when the frequencies of the higher harmonics generated in a nonlinear medium are close to the natural frequencies of the resonator. An important example of a nonlinear system with the necessary properties is an acoustic resonator with selective losses.

• Det paradoxala beteendet att en resonators enegriinnehåll och Q-faktor kan öka när dess dämpning ökar beskrivs.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Teknisk mekanik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Applied Mechanics (hsv//eng)

Nyckelord

nonlinear acoustics

resonator

Q-factor increase

acoustic resonance

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)