A COMBINED TUNED ABSORBER AND PENDULUM IMPACT DAMPER UNDER RANDOM EXCITATION

1998 ◽  
Vol 216 (2) ◽  
pp. 199-213 ◽  
Author(s):  
F.S. Collette
Keyword(s):  
Random Excitation ◽  
Impact Damper ◽  
Pendulum Impact

scholarly journals Classical impact damper and pendulum impact damper for potential civil engineering application.

1990 ◽  
pp. 113-124
Author(s):  
George Sy CHUA ◽  
Benito M. PACHECO ◽  
Yozo FUJINO ◽  
Manabu ITO
Keyword(s):  
Civil Engineering ◽  
Engineering Application ◽  
Impact Damper ◽  
Pendulum Impact

Performance of Particle Dampers Under Random Excitation

1996 ◽  
Vol 118 (4) ◽  
pp. 614-621 ◽  
Author(s):  
A. Papalou ◽  
S. F. Masri
Keyword(s):  
Wide Band ◽  
Small Mass ◽  
Random Excitation ◽  
Primary System ◽  
Mass Ratio ◽  
Impact Damper ◽  
Mean Square Response ◽  
Small Model ◽  
Particle Dampers ◽  
Auxiliary Mass

An experimental and analytical study is made of the performance of particle dampers under wide-band random excitation. A small model, provided with a nonlinear auxiliary mass damper, was used to investigate the major system parameters that influence the performance of particle dampers: total auxiliary mass ratio, particle size, container dimension, and the intensity and direction of the excitation. It is shown that properly designed particle dampers, even with a relatively small mass ratio, can considerably reduce the response of lightly damped structures. An approximate analytical solution, which is based on the concept of an equivalent single unit-impact damper, is presented. It is shown that the approximate solution can provide an adequate estimate of the root-mean-square response of the randomly excited primary system when provided with a particle damper that is operating in the vicinity of its optimum range of parameters.

Study on the influence of structural nonlinearity on the performance of multiunit impact damper

2020 ◽  
pp. 107754632092562
Author(s):  
Zheng Lu ◽  
Naiyin Ma ◽  
Hengrui Zhang
Keyword(s):  
Vibration Control ◽  
Damping Ratio ◽  
Mean Square Displacement ◽  
Random Excitation ◽  
Frame Structure ◽  
Control Effect ◽  
Momentum Exchange ◽  
Impact Damper ◽  
Structural Nonlinearity ◽  
Steel Frame Structure

In this article, the vibration control effect of the multiunit impact damper under stationary random excitation and seismic excitation is studied, based on both the elastic and nonlinear benchmark structures. The benchmark structure is a nonlinear steel frame structure, which can calculate the nonlinear response by considering the material nonlinearity at the ends of the beam and column. To analyze the influence of various system parameters on the performance of the multiunit impact damper, such as the number of units, mass ratio, damping ratio, and gap clearance, a great number of parameter studies are carried out. In addition, the control effects of the multiunit impact damper on elastic and nonlinear structures are compared to analyze the influence of structural nonlinearity on the performance of the multiunit impact damper. The results show that a lightweight multiunit impact damper with reasonable parameters can significantly reduce the root mean square displacement response of the benchmark structure. Furthermore, the structural nonlinearity will lead to a decrease in the vibration control performance of the multiunit impact damper. The reasons for this phenomenon are that the effective momentum exchange and energy dissipation of the multiunit impact damper will decrease when the benchmark structure responds in a nonlinear state.

Response of the impact damper to stationary random excitation

1973 ◽  
Vol 53 (1) ◽  
pp. 200-211 ◽  
Author(s):  
S. F. Masri ◽  
A. M. Ibrahim
Keyword(s):  
Random Excitation ◽  
Impact Damper ◽  
The Impact

A probabilistic approach to the dynamic analysis of ducts subjected to multibase harmonic and random excitation

1990 ◽  
Author(s):  
AMIT DEBCHAUDHURY ◽  
K. RAJAGOPAL ◽  
H. HO ◽  
J. NEWELL
Keyword(s):  
Dynamic Analysis ◽  
Probabilistic Approach ◽  
Random Excitation
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