Improving the dynamic integrity of a non-ideal oscillator via linear vibration absorber

2021 ◽  
Author(s):  
Vinícius Piccirillo
Keyword(s):  
Vibration Absorber ◽  
Linear Vibration ◽  
Dynamic Integrity

scholarly journals Vibro-impact attachments as shock absorbers

2008 ◽  
Vol 222 (10) ◽  
pp. 1899-1908 ◽  
Author(s):  
I Karayannis ◽  
A F Vakakis ◽  
F Georgiades
Keyword(s):  
Energy Dissipation ◽  
Vibration Absorber ◽  
Linear Vibration ◽  
Shock Energy ◽  
Shock Absorbers ◽  
Non Linear ◽  
Parametric Studies ◽  
Primary Structures ◽  
Shock Protection

The use of vibro-impact (VI) attachments as shock absorbers is studied. By considering different configurations of primary linear oscillators with VI attachments, the capacity of these attachments to passively absorb and dissipate significant portions of shock energy applied to the primary systems is investigated. Parametric studies are performed to determine the dependence of energy dissipation by the VI attachment in terms of its parameters. Moreover, non-linear shock spectra are used to demonstrate that appropriately designed VI attachments can significantly reduce the maximum levels of vibration of primary systems over wide frequency ranges. This is in contrast to the classical linear vibration absorber, whose action is narrowband. In addition, it is shown that VI attachments can significantly reduce or even completely eliminate resonances appearing in the linear shock spectra, thus providing strong, robust, and broadband shock protection to the primary structures to which they are attached.

NON-LINEAR VIBRATION ABSORBER FOR A SYSTEM UNDER SINUSOIDAL AND RANDOM EXCITATION: EXPERIMENTS

2002 ◽  
Vol 249 (4) ◽  
pp. 701-718 ◽  
Author(s):  
O. CUVALCI ◽  
A. ERTAS ◽  
S. EKWARO-OSIRE ◽  
I. CICEK
Keyword(s):  
Random Excitation ◽  
Vibration Absorber ◽  
Linear Vibration ◽  
Non Linear

SHOCK ISOLATION THROUGH PASSIVE ENERGY PUMPING CAUSED BY NONSMOOTH NONLINEARITIES

2005 ◽  
Vol 15 (06) ◽  
pp. 1989-2001 ◽  
Author(s):  
F. GEORGIADIS ◽  
A. F. VAKAKIS ◽  
D. M. MCFARLAND ◽  
L. BERGMAN
Keyword(s):  
Vibration Absorber ◽  
Primary System ◽  
Linear Vibration ◽  
Practical Applications ◽  
Energy Pumping ◽  
Weakly Coupled ◽  
Nonlinear Energy Pumping ◽  
Shock Isolation ◽  
Isolation Performance ◽  
Nonlinear Energy

We investigate shock isolation designs based on nonlinear energy pumping caused by nonsmooth stiffness elements. In particular, we numerically study the shock isolation properties of a primary linear system of two coupled nonconservative oscillators with weakly coupled attachments possessing clearance nonlinearities. Under shock excitation the nonlinear attachments (termed nonlinear energy sinks — NESs) can be designed to absorb a significant portion of the input energy, thus enhancing the shock isolation performance of the primary system. In contrast to the classical linear vibration absorber whose operation is restricted to narrowband frequency ranges, the NESs are capable of efficiently absorbing energies caused by transient broadband disturbances, a feature that facilitates their implementation in practical applications. Moreover, the nonsmooth nonlinearities considered in this work are easily implementable since they are realized by means of linear stiffness elements.

Optimum Vibration Absorbers for Linear Damped Systems

1981 ◽  
Vol 103 (4) ◽  
pp. 908-913 ◽  
Author(s):  
S. E. Randall ◽  
D. M. Halsted ◽  
D. L. Taylor
Keyword(s):  
Damping Ratio ◽  
Maximum Amplitude ◽  
Vibration Absorber ◽  
Vibration Absorbers ◽  
Mass Ratio ◽  
Linear Vibration ◽  
Optimal Linear ◽  
Damped Systems ◽  
Independent Parameters ◽  
Qualitative Discussion

This paper presents computational graphs that determine the optimal linear vibration absorber for linear damped primary systems. Considered as independent parameters are the main system damping ratio and the mass ratio examined over the range 0 to 0.50 and 0.01 to 0.40, respectively. The remaining nondimensional parameters were optimized using numerical methods based on minimum-maximum amplitude criteria. With independent parameters specified the computational graphs can be used to find the response amplitudes as well as the optimal absorber characteristics. This procedure is illustrated in a design example. A qualitative discussion of the sensitivity to parameter errors is presented.

The dynamics and design of a non-linear vibration absorber

1993 ◽  
Vol 207 (6) ◽  
pp. 363-374 ◽  
Author(s):  
D H Gonsalves ◽  
R D Neilson ◽  
A D S Barr
Keyword(s):  
Numerical Simulation ◽  
Equations Of Motion ◽  
Resonance Peak ◽  
Vibration Absorber ◽  
Linear Vibration ◽  
Frequency Range ◽  
Non Linear ◽  
Experimental Rig ◽  
Auxiliary Mass

This paper presents the design of an efficient non-linear vibration absorber. The system comprises a linear absorber with the addition of a spring between the two masses, which contacts the absorber mass when its displacement exceeds a certain value. The addition of this snubber stiffness facilitates a reduction in the amplitude of the second resonance peak of the linear absorber, which therefore enables the system to be operated over a wider frequency range without reaching larger amplitudes. The modification also has the effect of attenuating the response of the auxiliary mass. The equations of motion for the system are presented and optimization is carried out. A description of an experimental rig that was built follows. The results from the rig are compared with those from numerical simulation and show good correlation.

Practical non-linear vibration absorber design

1987 ◽  
Vol 116 (3) ◽  
pp. 545-559 ◽  
Author(s):  
H.J. Rice ◽  
J.R. McCraith
Keyword(s):  
Vibration Absorber ◽  
Linear Vibration ◽  
Non Linear
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