Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
On the formation of a super attenuation band in a beam
Submission Author:
Vinicius Germanos Cleante , SP , Brazil
Co-Authors:
Vinicius Germanos Cleante, Jean Paulo Carneiro Junior, Michael Brennan, Paulo José Paupitz Gonçalves
Presenter: Paulo José Paupitz Gonçalves
doi://10.26678/ABCM.DINAME2023.DIN2023-0148
Abstract
This paper investigates the formation of a super attenuation band in a beam structure with a vibration absorber attached. Typically, the interaction between the host structure and the vibration absorber creates a scattering mechanism and adds an anti-resonance component to the structure dynamic. When the system is correctly tuned, the two effects can be potentially combined and form a single but wide attenuation band. Using the dynamic stiffness method, the transversal and angular displacement transmissibilities of the structure are determined and the effect of changing the natural frequency of the vibration absorber is investigated numerically. It is shown that there are two tuned conditions in which a smooth super attenuation is formed. One is when the system is tuned to a frequency which corresponds to the anti-resonance of the point and transfer receptances with respect to the source. The second condition is when the system is tuned to the free-free natural frequency of the system. In both conditions, the correct tuning creates a smooth super attenuation band capable to reduce the transversal vibration in the beam over a larger frequency range.
Keywords
super attenuation band, beam structure, vibration absorber
