An innovative adaptive tuned vibration absorber with variable mass moment of inertia for mitigation of transient response of systems

Shakib, Arman; Ghorbani‐Tanha, Amir K.

doi:10.1002/stc.2518

Cited by 8 publications

(5 citation statements)

References 40 publications

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“…Research on self-tuning or self-adaptive vibration neutralisers and absorbers can be found in literature, for example [1,2], and this can be achieved in several ways, for example with magnetorheological elastomer (MRE) [3][4][5][6][7][8], with smart materials using shape memory alloy (SMA) [9][10][11][12][13][14][15]. Other ways of doing this involve varying the mass moment of inertia [16], and changing the stiffness element geometry [17][18][19], with rotating spring elements, for example [20][21][22]. Rasooli et al [4] presented a semi-active adaptive tuned vibration absorber consisting of a multilayer sandwich beam with MRE layers and electromagnets attached at the top and bottom layers.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on a passive self-tuning vibration neutraliser for two distinct frequencies

Nehemy,

Rustighi,

Gonçalves

et al. 2024

J. Phys.: Conf. Ser.

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Tuned vibration neutralisers are used to suppress the vibration of a host structure subjected to external harmonic forces. Although they are analogous to tuned vibration absorbers, the primary difference is that while absorbers are usually designed with optimum damping to attenuate vibration in a frequency range around a resonance, neutralisers are designed with relatively low damping to act as a mechanical notch-filter. The narrow band frequency in which the conventional neutralisers are effective, and the mistuning compromising their performance, are known problems. Thus, self-tuning vibration neutralisers were introduced to make them more robust. In many cases, however, these systems need an external power source to adapt. This paper concerns an investigation into a self-tuning vibration neutraliser for two distinct frequencies, that does not need an external power source. It consists of a rectangular beam with tip masses, which is held at its centre in a roller bearing that is fixed to a host structure. The rectangular cross section has two different stiffnesses in the local coordinates that can rotate with respect to the global reference. Results from some experimental tests compare very well with time domain numerical simulations. It is shown that the coupling between two orthogonal degrees-of-freedom enables the neutraliser to passively tune to one of two tuned frequencies, depending on the frequency of the external harmonic force.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on a passive self-tuning vibration neutraliser for two distinct frequencies

Nehemy,

Rustighi,

Gonçalves

et al. 2024

J. Phys.: Conf. Ser.

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“…A large-span floor structure is proposed as a case study. In [14], it is shown that the innovative adaptive tuned vibration absorber with a variable mass moment of inertia is suitable for the mitigation of the transient response of systems. The adaptive passive variable mass tuned mass damper can control human-induced vertical vibrations.…”

Section: Introductionmentioning

confidence: 99%

Oscillator with Time-Variable Degree of Nonlinearity: Theory and Application in Aging of Polymer Composite Structure

Cveticanin,

Zukovic

2023

Mathematics

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In this paper, a new type of one-degree-of-freedom pure nonlinear oscillator with a time variable degree of nonlinearity is introduced. Namely, the degree of the nonlinearity in the restitution force is not a constant but a ‘slow time’ variable function. The mathematical model is a second-order nonlinear differential equation with time-variable parameters. An approximate solving procedure based on the method of time-variable amplitude, frequency and phase is developed. It is found that the vibration properties depend on initial conditions and the degree of time-variable function. The theoretical results are tested on almost linear, cubic and high-degree nonlinear oscillators. According to theoretical considerations, the process of aging in fiber-reinforced polymer composite structure is investigated. It is found that the amplitude and the frequency of vibration of the reinforced polymer structure decrease over time. The result is in good agreement with already published experimental data. The additional conclusion of the research is that the oscillator model suggested in the paper is suitable for the prediction of mechanic properties of the polymer structure in aging and also in similar destructive processes.

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“…The main purpose of using a SATMD is to change its properties in order to alter and tune its frequency. This can be done by changing its damping (Hrovat et al, 1983; Abé, 1996; Pinkaew and Fujino, 2001; Setareh, 2002), mass and mass moment of inertia (Ivers et al, 2008; Mohammadi-Ghazi et al, 2012; Shi et al, 2018; Shakib and Ghorbani-Tanha, 2020), and stiffness (Ghorbani-Tanha et al, 2011; Nagarajaiah, 2000; Rafiepour et al, 2014; Walsh and Lamancusa, 1992).…”

Section: Introductionmentioning

confidence: 99%

An innovative semi-active pendulum tuned mass damper and its application in vibration control

Sadatieh

Ghorbani‐Tanha

2022

Journal of Vibration and Control

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An innovative Semi-Active Pendulum Tuned Mass Damper (SAPTMD) with variable frequency is introduced in this paper. The SAPTMD consists of two identical pendulum systems, each consisting of a pendulum and two springs attached to the pendulum mass. The pendulums are mounted on two boxes that can rotate symmetrically around the horizontal shafts that pass through them. Due to the change in inclination of the pendulum systems and, consequently, the orientation of the oscillating pendulums, the frequency of the proposed system can change within a predefined range. Besides, the need for less height for installation is another advantage of the SAPTMD over the conventional pendulum tuned mass dampers. In order to show the efficiency of the SAPTMD, it is attached to a single degree of freedom primary system excited similar to excitation due to an unbalanced rotating machinery during its start-up period. The SAPTMD’s performance is compared with a classical tuned mass damper. As it is shown, the response of the primary system is reduced noticeably. Furthermore, the performance of the system is improved by utilizing a fuzzy Proportional-Integral-Derivative (PID) controller.

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An innovative adaptive tuned vibration absorber with variable mass moment of inertia for mitigation of transient response of systems

Cited by 8 publications

References 40 publications

Experimental investigation on a passive self-tuning vibration neutraliser for two distinct frequencies

Experimental investigation on a passive self-tuning vibration neutraliser for two distinct frequencies

Oscillator with Time-Variable Degree of Nonlinearity: Theory and Application in Aging of Polymer Composite Structure

An innovative semi-active pendulum tuned mass damper and its application in vibration control

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