Vibration transmissibility in systems with the use of inerter
Willian Minnemann Kuhnert1; Fransber Santade1; Diego Franscisco Ledezma Ramírez2; Paulo José Paupitz Gonçalves1
1 Universidade Estadual Paulista "Júlio de Mesquita Filho"; 2 Universidad Autónoma de Nuevo León
doi:10.20906/CPS/COB-2015-0064
Resumo
Recently great attention has been given to a mechanical device known as inerter. An inerter is a mechanical system that converts linear into rotational motion. It is the two terminal mechanical analogue of a capacitor when comparing a mechanical single degree of freedom stiffness-mass-damping to an electrical circuit consisting of inductor-resistor-capacitor. The use of inerter has improved handling and grip in Formula 1 racing cars in 2008 and then, and there is an explanation for this in this paper. Displacement transmissibility (DT) analytical equation is obtained for harmonic excitation, and shock displacement ratio (SDR) is obtained by numerical simulation for shock excitation, for systems in which the inerter is included. DT and SDR behavior for each system, under both excitation cases, for underdamped, critically damped and super damped systems, and for different mass ratios are shown, and it can be seen the DT and SDR of each system can be improved in some frequency ranges, and also can be worsen in another frequency ranges. The results of each system are compared with each other to show their differences and to make it possible to discuss their engineering application.
Palavras-chave: Inerter; J-Damper; Shock Excitation; Harmonic Excitation; Transmissibility