A spring-supported fine particle impact damper to reduce harmonic vibration of cantilever beam

The energy dissipation mechanisms of conventional impact damper (CID) are mainly momentum exchange and friction. During the impact process, a lot of vibration energy cannot be exhausted but reverberated among the vibration partners. Besides, the CID may produce the additional vibration to the system or even amplify the response in the low-frequency vibration. To overcome these shortcomings, this paper proposes a new fine particle impact damper (FPID) which for the first time introduces the fine particle plastic deformation as an irreversible energy sink. Then, the experiments of the cantilevered beam with the CID and that with the FPID are, respectively, carried out to investigate the behavior of FPID. The experimental results indicate that the FPID has a better performance in vibration damping than in the CID and the FPID works well in control of the vibration with frequency lower than 50 Hz, which is absent to the non-obstructive particle damper. Thus, the FPID has a bright and significant application future because most of the mechanical vibration falls in the range of low freqency.

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Damping of Beam Vibrations Using Tuned Particles Impact Damper

Applied Sciences ◽

10.3390/app10186334 ◽

2020 ◽

Vol 10 (18) ◽

pp. 6334 ◽

Cited By ~ 1

Author(s):

Mateusz Żurawski ◽

Robert Zalewski

Keyword(s):

Resonant Frequency ◽

Granular Material ◽

Cantilever Beam ◽

Vibration Amplitude ◽

Active Damping ◽

Particle Impact ◽

Impact Damper ◽

Vibrating System ◽

Damping Characteristics ◽

Dynamical Features

The presented paper reveals an innovative device which is the Tuned Particle Impact Damper (TPID). The damper enables the user change the dynamical features of the vibrating system thanks to rapidly tuning the volume of the container where the grains are locked. The effectiveness of proposed semi-active damping methodology was confirmed in experiments on vibrations of a cantilever beam excited by kinematic rule. Various damping characteristics captured for different volumes of the grains container and mass of granular material are presented. It is confirmed that the proposed TPID device allowed for efficient attenuation of the beam’s vibration amplitude in the range of its resonant frequency vibrations.

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Dynamics and Performance of a Harmonically Excited Vertical Impact Damper

Journal of Vibration and Acoustics ◽

10.1115/1.2827364 ◽

2008 ◽

Vol 130 (2) ◽

Cited By ~ 8

Author(s):

Sanjiv Ramachandran ◽

George Lesieutre

Keyword(s):

Loss Factor ◽

Vertical Direction ◽

Theoretical Models ◽

Coefficient Of Restitution ◽

Numerical Continuation ◽

Particle Impact ◽

Impact Damper ◽

High Loss ◽

Wide Range ◽

And Performance

Particle impact dampers (PIDs) have been shown to be effective in vibration damping. However, our understanding of such dampers is still limited, based on the theoretical models existing today. Predicting the performance of the PID is an important problem, which needs to be investigated more thoroughly. This research seeks to understand the dynamics of a PID as well as those parameters which govern its behavior. The system investigated is a particle impact damper with a ceiling, under the influence of gravity. The base is harmonically excited in the vertical direction. A two-dimensional discrete map is obtained, wherein the variables at one impact uniquely dictate the variables at the next impact. This map is solved using a numerical continuation procedure. Periodic impact motions and “irregular” motions are observed. The effects of various parameters such as the gap clearance, coefficient of restitution, and the base acceleration are analyzed. The dependence of the effective damping loss factor on these parameters is also studied. The loss factor results indicate peak damping for certain combinations of parameters. These combinations of parameters correspond to a region in parameter space where two-impacts-per-cycle motions are observed over a wide range of nondimensional base accelerations. The value of the nondimensional acceleration at which the onset of two-impacts-per-cycle solutions occurs depends on the nondimensional gap clearance and the coefficient of restitution. The range of nondimensional gap clearances over which two-impacts-per-cycle solutions are observed increases as the coefficient of restitution increases. In the regime of two-impacts-per-cycle solutions, the value of nondimensional base acceleration corresponding to onset of these solutions initially decreases and then increases with increasing nondimensional gap clearance. As the two-impacts-per-cycle solutions are associated with high loss factors that are relatively insensitive to changing conditions, they are of great interest to the designer.

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Investigation into the linear velocity response of cantilever beam embedded with impact damper

Journal of Vibration and Control ◽

10.1177/1077546318821711 ◽

2019 ◽

Vol 25 (7) ◽

pp. 1365-1378 ◽

Cited By ~ 6

Author(s):

Yiqing Yang ◽

Xi Wang

Keyword(s):

Cantilever Beam ◽

Continuous System ◽

Linear Velocity ◽

Superposition Method ◽

Momentum Exchange ◽

Impact Damper ◽

Mode Superposition Method ◽

Velocity Response ◽

The Impact ◽

Nonlinear Velocity

The impact damper causes momentum exchange between the primary structure and impact mass, and achieves vibration attenuation through repeated collisions. A cantilever beam embedded with the impact damper is modeled in the form of a continuous system, and the equations of motion are formulated based on the mode superposition method. The mechanism of the impact damper is investigated, and linear velocity response is achieved by a proper selection of a mass ratio of 8.4%, clearance within 0.30 mm, and excitation force ranged from 3.2 N to 5.5 N. The reverse collision has higher damping than co-directional collision, based on which a new criterion of response regimes is proposed for the design of the impact damper. The velocity responses of the damped cantilever beam under sinusoidal and impulse excitation are simulated and verified via the sinusoidal sweep experiments. The velocity amplitudes of the damped cantilever beam are linearly decreased when the clearance is increased within 0.30 mm. Finally, linear and nonlinear velocity responses of the damped cantilever beam are discussed. It is found that the nonlinear velocity response reaches larger damping, but that a strongly modulated response exists.

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Prediction of the dynamic response of a plate treated by particle impact damper

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406213491907 ◽

2013 ◽

Vol 228 (5) ◽

pp. 799-814 ◽

Cited By ~ 8

Author(s):

Moez Trigui ◽

Emmanuel Foltete ◽

Noureddine Bouhaddi

Keyword(s):

Dynamic Response ◽

Excitation Frequency ◽

Element Model ◽

Nonlinear Damping ◽

Design Parameters ◽

Particle Impact ◽

Equivalent Viscous Damping ◽

Impact Damper ◽

Experimental Characterisation ◽

Good Agreement

In this paper, an experimental characterisation of a particle impact damper (PID) under periodic excitation is investigated. The developed method allows the measurement of damping properties of PID without the supplementary use of a primary structure. The passive damping of PID varies with the excitation frequency and its design parameters. The nonlinear damping of PID is then interpreted as an equivalent viscous damping to be introduced in a finite element model of a structure to predict its dynamic response. The results of numerical simulations are in good agreement with those of experiment and show the relevance of the developed method to predict the dynamic behaviour of a structure treated by PID’s.

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Experimental study of passive vibration suppression using absorber with spherical ball impact damper

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406216643342 ◽

2016 ◽

Vol 231 (17) ◽

pp. 3193-3201 ◽

Cited By ~ 2

Author(s):

Riadh Chaari ◽

Fathi Djemal ◽

Fakher Chaari ◽

Mohamed Slim Abbes ◽

Mohamed Haddar

Keyword(s):

Vibration Suppression ◽

Industrial Applications ◽

Design Parameters ◽

Particle Impact ◽

Ball Impact ◽

Impact Damper ◽

Ball Size ◽

Wide Range ◽

The Impact ◽

Impact Damping

Impact dampers are efficient in many industrial applications with a wide range of frequencies. An experimental analysis of the impact damping of spherical balls is investigated to simplify the particle impact damping design and improve the vibration suppression. The objective of the study is to analyze some of the design parameters of impact damper using spherical balls. The experimental investigation consists to test the effect of the ball size for each mass level, the number of balls for each size level and different exciting force levels on vibrations of the main structure. The parametric study provided useful information to understand and optimize Particle Impact Damping design.

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