Experimental implementation of an optimum viscoelastic vibration absorber for cubic nonlinear systems

Bronkhorst, Klaas B.; Febbo, Mariano; Lopes, Eduardo Márcio de Oliveira; Bavastri, Carlos Alberto

doi:10.1016/j.engstruct.2018.02.074

Cited by 18 publications

(8 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this paper, the primary system is linear. A methodology for the VDA design considering the primary system nonlinear was studied by Bronkhorst et al [27]. In both works, excellent results are presented, reducing the vibration amplitude by 30 dB in the first case and by 20 dB in the second.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of the dynamic behavior of a cantilever beam driven by two non-ideal sources

Varanis

Mereles

Silva

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Non-ideal energy sources are present in several engineering applications where the power source interacts with the dynamics of the structure to which it is coupled. The systems driven by this kind of source present a rich dynamic behavior and some phenomena that can only be observed under non-ideal consideration. The modeling of such systems becomes much more complex due to the interaction between the system and the energy source, requiring an additional equation. The present work proposes a continuous vibration model of a cantilever beam with two unbalanced DC motors. The motors are considered non-ideal energy sources. The advantage of the continuous approach is that the position of the motors can be easily varied. In addition, time-frequency methods are performed in order to characterize and identify the occurrence of the Sommerfeld effect on the non-stationary operation. In order to validate the model, experimental measurements were performed and, subsequently, compared with the numerical results.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of the dynamic behavior of a cantilever beam driven by two non-ideal sources

Varanis

Mereles

Silva

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…The state-of-the-art highlights the use of the fractional derivative model combined to a multidegree of freedom (MDOF) concept, all combined to methods such as the generalized equivalent parameters (GEP), in order to achieve a robust and accurate model and a low computational cost [13]. However, despite the incipient use of viscoelastic dynamic neutralizers (VDN) in rotordynamics [15,16], there is a well-established literature dealing with VDN applied to non-rotating structures [17][18][19][20][21][22][23][24][25]. The main reason to study VDN applied to rotordynamics is that such devices are auxiliary to the primary system, differently from the VES systems that work as supports for the primary system thus replacing or being combined to bearings.…”

Section: Introductionmentioning

confidence: 99%

“…Among the pioneering works on the research of VDN for non-rotating structures, one can mention [17], which focused on the design of absorbers for simple types of primary systems-one and two degrees of freedom. Other researches have improved the models of VDN, such as [18][19][20][21][22][23][24][25]. Among those articles, [21] is known as the first to propose the use of a methodology combining the fractional derivative model and the GEP for the optimal design of VDN.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of multi-DOF viscoelastic dynamic neutralizers for passive vibration control in rotordynamics

Ribeiro

Bavastri

2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

“…On DVNs with viscoelastic materials, Snowdon (1959) was one of the pioneers in designing these devices for one-DOF primary systems. Since then, many researches have been developed to design different types of neutralizers for vibration control in simple and complex structures, as can be seen, more recently, in Bronkhorst et al (2018) and Voltolini et al (2018).…”

Section: Introductionmentioning

confidence: 99%

A methodology for an optimal design of physical parameters, positions, and viscoelastic materials of simple dynamic absorbers for passive vibration control

Silva

Bavastri

2019

Journal of Vibration and Control

View full text Add to dashboard Cite

Dynamic vibration absorbers are simple mechanical devices that are attached to a structure aiming at reducing vibration levels. Designing such devices for vibration control of mechanical systems using viscoelastic materials results in low costs, easy construction, and higher efficacy due to their ability to dissipate vibration energy. In this context, the present study aims at developing a methodology for an optimal design of a set of viscoelastic dynamic absorbers considering their natural frequencies, the positions to attach them onto the structure to be controlled, and the viscoelastic materials as variables to be optimized for different working temperatures. The optimal configuration is obtained by applying a hybrid optimization technique, which uses genetic algorithms (considering continuous and discrete variables in the same design vector) aiming at approximating the global minimum point and, subsequently, a nonlinear programming method (simplex based on the Nelder–Mead method) to perform a local search. An example of dynamic absorber design to reduce vibration levels in a one-degree-of-freedom (DOF) system and on a steel plate (multiple-DOFs) is presented. The results show the efficacy of the methodology for passive control of vibrations acting on a broadband of frequencies and different temperatures.

show abstract

Experimental implementation of an optimum viscoelastic vibration absorber for cubic nonlinear systems

Cited by 18 publications

References 32 publications

Numerical and experimental investigation of the dynamic behavior of a cantilever beam driven by two non-ideal sources

Numerical and experimental investigation of the dynamic behavior of a cantilever beam driven by two non-ideal sources

Optimal design of multi-DOF viscoelastic dynamic neutralizers for passive vibration control in rotordynamics

A methodology for an optimal design of physical parameters, positions, and viscoelastic materials of simple dynamic absorbers for passive vibration control

Contact Info

Product

Resources

About