Oscillation Attenuation in a Building-like Structure by Using a Flexible Vibration Absorber

Trujillo-Franco, L. G.; Flores-Morita, N.; Abundis-Fong, H. F.; Beltrán-Carbajal, Francisco; Dzul, A.; Rivera-Arreola, Daniel Eduardo

doi:10.3390/math10030289

Cited by 7 publications

(6 citation statements)

References 32 publications

(47 reference statements)

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“…Thus, a different configuration of the secondary system for the building-like structure was built, as depicted in Figure 4. More details on the experimental setup can also be found in [34]. In this second experimental configuration, the vibrating dynamics of the secondary system occurs in a horizontal plane.…”

Section: Second Experimental Case Studymentioning

confidence: 99%

Online Frequency Estimation on a Building-like Structure Using a Nonlinear Flexible Dynamic Vibration Absorber

et al. 2022

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The online frequency estimation of forced harmonic vibrations on a building-like structure, using a nonlinear flexible vibration absorber in a cantilever beam configuration, is addressed in this article. Algebraic formulae to compute online the harmonic excitation frequency on the nonlinear vibrating mechanical system using solely available measurement signals of position, velocity, or acceleration are presented. Fast algebraic frequency estimation can, thus, be implemented to tune online a semi-active dynamic vibration absorber to obtain a high attenuation level of undesirable vibrations affecting the main mechanical system. A semi-active vibration absorber can be tuned for application where variations of the excitation frequency can be expected. Adaptive vibration absorption for forced harmonic vibration suppression for operational scenarios with variable excitation frequency can be then performed. Analytical, numerical, and experimental results to demonstrate the effectiveness and efficiency of the operating frequency estimation, as well as the acceptable attenuation level achieved by the tunable flexible vibration absorber, are presented. The algebraic parametric estimation approach can be extended to add capabilities of variable frequency vibration suppression for several configurations of dynamic vibration absorbers.

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Section: Second Experimental Case Studymentioning

confidence: 99%

Online Frequency Estimation on a Building-like Structure Using a Nonlinear Flexible Dynamic Vibration Absorber

et al. 2022

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“…Therefore, it is a relatively reasonable choice to allow the structure to enter plasticity to a certain extent to prevent brittle failure and collapse under the action of moderate earthquake, large earthquake and giant earthquake. The discreteness of the probability distribution of the response of the structure under random earthquake will be further amplified as the structure enters nonlinearity [10]. In order to safely consider the less favorable conditions, the structural seismic safety reserve needs to be further improved with the expansion of the discreteness of response distribution.…”

Section: Requirements For Vibration Reduction Designmentioning

confidence: 99%

Analysis and optimization of seismic performance of high-rise residential building

Wang¹,

Chang²,

Kong³

et al. 2022

J. vibroeng.

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In order to improve the seismic performance of high-rise buildings, a friction damper installation scheme was proposed in the paper. Through numerical simulation and experimental testing, the vibration reduction effect was compared and verified. Herringbone structure was applied to install friction damper in the bearing wall. Based on this vibration reduction scheme, the finite element model of high-rise building was established, and the influence of damper on the modal characteristics of building frame was analyzed. It can be known that the damper has little influence on the natural frequency, but has a great influence on the amplitude range of the excitation response. In the finite element model, two kinds of seismic waves were applied, the strength and dynamic response was simulated and calculated, and the maximum deformation and stress results were obtained. Compared with the initial model, it can be known that the more intense the vibration is, the more obvious the damping effect of the damper is. A seismic excitation simulation system based on acceleration sensor detection is designed and applied to the wall vibration test. The results show that the maximum vibration acceleration of the measured point is reduced by 26.3 % by the damper, and the stable seismic effect can still be maintained during the impact of extension. Compared with the traditional hardness and volume reinforcement scheme, the friction damper can reduce the production cost and improve the adaptability to seismic wave excitation, which provides an important basis for seismic research in other fields.

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“…There even exist a few cases, where some specific operating points of a machine result in a structural instability, which may end up in the worst case of a destruction of the plant. As a counter measure against such unwanted resonance effects so-called vibration absorbers are widely used, which basically represent an oscillating system acting against the resonance of a vibrating primary system or structure, see for instance [1,2,3,4,5,6]. Most vibration absorbers are able to operate at a single frequency and, thus, are designed for one specific working point.…”

Section: Introductionmentioning

confidence: 99%

A Hydro-Mechanic Vibration Absorber With Adjustable Operating Frequency

Kogler,

Winkler,

Plöckinger

2024

14th International Fluid Power Conference

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Unwanted resonances in industrial plants often result in unpleasant noise or may even end up in a reduced lifetime of mechanical structures and components. Such vibrations are often reduced by wellestablished vibration absorbers, which are designed and precisely tuned to one specific frequency. Furthermore, often the natural frequency of, for instance, a mechanical structure is not accurately known and must be identified by an experimental modal analysis. Another limitation of conventional single-frequency absorbers is that in some applications the frequency of the unwanted vibrations varies over lifetime, which reduces the effectiveness of the initially designed absorber. Moreover, in many cases the frequency of the undesirable vibration changes with the operating point of the plant, which requires the installation of multiple vibration absorbers with different operating frequencies. In this paper a new hydro-mechanical vibration absorber with a continuously adjustable operating frequency is presented, which eliminates the shortcomings mentioned above. In contrast to conventional absorbers the stiffness of the hydro-mechanical spring mass absorber is realized by a gas-loaded hydraulic capacitance, which depends on the mean operating pressure. The concept of the presented absorber is investigated theoretically and validated by simulation experiments. The results are discussed in detail and an outlook on further steps in development is provided.

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Oscillation Attenuation in a Building-like Structure by Using a Flexible Vibration Absorber

Cited by 7 publications

References 32 publications

Online Frequency Estimation on a Building-like Structure Using a Nonlinear Flexible Dynamic Vibration Absorber

Online Frequency Estimation on a Building-like Structure Using a Nonlinear Flexible Dynamic Vibration Absorber

Analysis and optimization of seismic performance of high-rise residential building

A Hydro-Mechanic Vibration Absorber With Adjustable Operating Frequency

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