Multiunit impact damper—Re-examined

Bapat, C.N.; Sankar, S.

doi:10.1016/s0022-460x(85)80015-8

Cited by 44 publications

(26 citation statements)

References 8 publications

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“…Ref. 14) shows that dividing a large CID into a moderate number of smaller units (up to 9) gives the same level of performance. Free vibration experiments on the PID13 show 5 values for a given amplitude to be equal for a large PID compared with up to 4 smaller units.…”

Section: Comparison Of the Cid Pid And Tmd (1)mentioning

confidence: 97%

Classical Impact Damper and Pendulum Impact Damper for Potential Civil Engineering Application

Chua¹,

Pacheco

Fujino

et al. 1990

Doboku Gakkai Ronbunshu

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The classical impact damper (CID) and the pendulum impact damper (PID) are studied for the suppression of horizontal vibrations of civil engineering structures. Experiments on the PID to verify the validity of the mathematical model are done and comparisons with simulation results are provided. Parametric study under harmonic excitation shows that the effectiveness of the CID is sensitive to changes in the amplitude of the excitation. On the other hand, the PID is insensitive to changes in the amplitude of the excitation when its frequency is close to the structural frequency, and it is less sensitive to deviations in tuning than the tuned mass damper (TMD). Comparison of the CID, PID and TMD shows optimum efficiency in terms of mass ratio, under steadystate motion and ideal conditions, to be highest for the TMD and lowest for the PID. Included is a discussion of the practical constraints that may govern the actual choice of damper.

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Section: Comparison Of the Cid Pid And Tmd (1)mentioning

confidence: 97%

Classical Impact Damper and Pendulum Impact Damper for Potential Civil Engineering Application

Chua¹,

Pacheco

Fujino

et al. 1990

Doboku Gakkai Ronbunshu

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show abstract

“…(1), and the equations of motion of the impactor in the horizontal and vertical directions are given by Eqs. As for the subscripts in these equations, lw denotes the left wall, rw the right wall, and b the base surface, while µ indicates coefficient of friction and g the acceleration of gravity.…”

Section: Equations Of Motionmentioning

confidence: 99%

“…Bapat et al studied a multi-unit impact damper having multiple damping elements each featuring a single impactor built into a container (1) . They examined how the number of damping elements as well as friction characteristics between an impactor and container affected the mechanical characteristics of the impact damper.…”

Section: Introductionmentioning

confidence: 99%

Vibration Control Using an Impact Damper System -Comparison between Translating Impactor and Rotating Impactor, and Improvement of Rotating Impactor-

Nagashima

Sato

Tanaka

2010

JEE

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Impact damper systems are used to reduce the vibration of a lightly damped resonant primary system. The impact damper consists of an impactor and a container. The container is attached to the mass part of the primary system. The container mainly consists of two walls, and the impactor is placed inside the container. And since the impactor is free to move in the container, the impactor collides with the walls. When the impactor collides, some of the vibration energy of the primary system is momentarily converted to kinetic energy of the impactor. That is, impact damper system is damper which utilizes this energy conversion by impact phenomenon. We compared the damping characteristics in an impact damper system between a translating impactor and a rotating impactor and found that the rotating impactor is superior to the translating impactor. Then, with the aim of improving the damping characteristics of the rotating impactor, we proposed that an eccentric mass be added to the rotating impactor and confirmed that the damping effect improves because of the eccentric mass. Next, we calculated the mechanical energy of a vibration system having an impact damper and investigated the mechanism behind this improvement in damping characteristics due to the eccentric mass. In particular, we classified the impacts that occur between the impactor and wall into three types and examined the change in energy of the primary vibration system immediately after such impacts. In this way, we clarified the mechanism behind improved damping effect due to the addition of an eccentric mass.

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“…Particle dampers are passive control systems that absorb the incoming energy through impact of particles with each other and with the walls of the container resulting in exchange of momentum between the particles and the primary system. Such devices have been used for years to reduce the vibrations of machines and structures [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Papalou et al [14][15][16][17] reported that a properly designed particle damper replacing one of the top drums of a classical multi-drum column without capital can achieve substantial reduction of the motion.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Particle Damper’s Position on the Dynamic Response of Classical Columns

Papalou

2017

Period. Polytech. Civil Eng.

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Multiunit impact damper—Re-examined

Cited by 44 publications

References 8 publications

Classical Impact Damper and Pendulum Impact Damper for Potential Civil Engineering Application

Classical Impact Damper and Pendulum Impact Damper for Potential Civil Engineering Application

Vibration Control Using an Impact Damper System -Comparison between Translating Impactor and Rotating Impactor, and Improvement of Rotating Impactor-

The Effect of Particle Damper’s Position on the Dynamic Response of Classical Columns

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