scholarly journals Semi-active vibration absorbers for the high-rise objects

2018 ◽  
Vol 4 (1) ◽  
pp. 74-104
Author(s):  
Bohdan Diveyev ◽  
Keyword(s):  
Vibration Absorbers ◽  
High Rise ◽  
Active Vibration

Payload noise suppression using distributed active vibration absorbers

2002 ◽  
Author(s):  
Stephen D. O'Regan ◽  
Bart Burkewitz ◽  
Christopher Fuller ◽  
Steven A. Lane ◽  
Marty Johnson
Keyword(s):  
Noise Suppression ◽  
Vibration Absorbers ◽  
Active Vibration

scholarly journals Damping in magnetorheological elastomers under compressive stress

2019 ◽  
Vol 254 ◽  
pp. 06002 ◽  
Author(s):  
Mateusz Kukla ◽  
Krzysztof Talaśka ◽  
Ireneusz Malujda
Keyword(s):  
Smart Materials ◽  
Hysteresis Loops ◽  
Machine Construction ◽  
Vibration Absorbers ◽  
Magnetorheological Elastomers ◽  
Practical Applications ◽  
Mechanical Hysteresis ◽  
Compressive Stresses ◽  
Active Vibration ◽  
Energy Absorbers

Magnetorheological elastomers are an important area of study in non-classical engineering materials. These are smart materials, in which some of the physical properties are dependent on the applied magnetic field. This unique property allows to suggest new, innovative practical applications. It is therefore relevant to carry out studies in the possible application of magnetorheological elastomers in machine construction. The present article presents the results of study regarding the properties of the discussed materials subject to compressive stresses. Particular attention is given to the observed growth of surface area of mechanical hysteresis loops, which is evidence of the possibility to change the damping properties of magnetorheological elastomers. This property can be utilized in the construction of different types of machines and devices. These mostly applies to energy absorbers such as active vibration absorbers.

Active control of payload fairing noise using distributed active vibration absorbers

2003 ◽  
Vol 113 (4) ◽  
pp. 2251-2251
Author(s):  
Arnaud Charpentier ◽  
Marty E. Johnson ◽  
Chris R. Fuller
Keyword(s):  
Active Control ◽  
Vibration Absorbers ◽  
Active Vibration ◽  
Payload Fairing

1211 Semi-active Vibration Control for Connected Four High-Rise Buildings with MR dampers

2007 ◽  
Vol 2007.10 (0) ◽  
pp. 67-72
Author(s):  
Shigeru INABA ◽  
Chinori IIO ◽  
Shingo MITANI ◽  
Toru WATANABE ◽  
Kazuto SETO
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
High Rise ◽  
Mr Dampers ◽  
Active Vibration

scholarly journals Reduced-Order Active Vibration Control for High-Rise Buildings

1994 ◽  
Vol 37 (3) ◽  
pp. 482-487 ◽  
Author(s):  
Toru Watanabe ◽  
Kazuo Yoshida ◽  
Taro Shimogou ◽  
Tetsuo Suzuki ◽  
Mitsuru Kageyama ◽  
...  
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Reduced Order ◽  
High Rise ◽  
Active Vibration

scholarly journals Wind-Induced Response Control of High-Rise Buildings Using Inerter-Based Vibration Absorbers

2019 ◽  
Vol 9 (23) ◽  
pp. 5045 ◽  
Author(s):  
Qinhua Wang ◽  
Haoshuai Qiao ◽  
Dario De Domenico ◽  
Zhiwen Zhu ◽  
Zhuangning Xie
Keyword(s):  
Damping Ratio ◽  
Element Model ◽  
Tuned Mass Damper ◽  
Induced Response ◽  
Vibration Absorbers ◽  
Acceleration Response ◽  
Vibration Mitigation ◽  
High Rise ◽  
Mass Damper ◽  
Good Trade

The beneficial mass-amplification effect induced by the inerter can be conveniently used in enhanced variants of the traditional Tuned Mass Damper (TMD), namely the Tuned Mass-Damper-Inerter (TMDI) and its special case of Tuned Inerter Damper (TID). In this paper, these inerter-based vibration absorbers are studied for mitigating the wind-induced response of high-rise buildings, with particular emphasis on a 340 m tall building analyzed as case study. To adopt a realistic wind-excitation model, the analysis is based on aerodynamic forces computed through experimental wind tunnel tests for a scaled prototype of the benchmark building, which accounts for the actual cross-section of the structure and the existing surrounding conditions. Mass and stiffness parameters are extracted from the finite element model of the primary structure. Performance-based optimization of the TMDI and the TID is carried out to find a good trade-off between displacement- and acceleration-response mitigation, with the installation floor being an explicit design variable in addition to frequency and damping ratio. The results corresponding to 24 different wind directions indicate that the best vibration mitigation is achieved with a lower installation floor of the TMDI/TID scheme than the topmost floor. The effects of different parameters of TMD, TMDI and TID on wind-induced displacement and acceleration responses and on the equivalent static wind loads (ESWLs) are comparatively evaluated. It is shown that the optimally designed TMDI/TID can achieve better wind-induced vibration mitigation than the TMD while allocating lower or null attached mass, especially in terms of acceleration response.

Active vibration control of a shaft bracket-plate coupled system

2021 ◽  
pp. 147509022110332
Author(s):  
Dequan Yang ◽  
Xiling Xie ◽  
Mingke Ren ◽  
Zhiyi Zhang
Keyword(s):  
Vibration Control ◽  
Plate Theory ◽  
Active Vibration Control ◽  
Beam Theory ◽  
Experimental System ◽  
Coupled System ◽  
Plate Vibration ◽  
Vibration Absorbers ◽  
Thin Plate Theory ◽  
Active Vibration

Active vibration control of a shaft bracket-plate coupled system is investigated. The vibration of the plate is controlled with electromagnetic vibration absorbers (EVAs), which are mounted around the feet of the shaft bracket to impede the transmission of vibration from the bracket apex to the plate. A dynamic model is established on the Timoshenko beam theory and the Kirchhoff thin plate theory to reveal the mechanism of vibration transmission. It is exhibited that all the induced forces and moments at the coupling points contribute much to the transverse responses of the plate. The feasibility of active control with the EVAs is evaluated numerically based on the controllability of the plate vibration. It is demonstrated that the two-point in-plane control is able to attenuate the plate vibration under the excitation of in-plane disturbance forces, while the multi-point control is effective in reducing the plate vibration regardless of the directions of disturbance forces. An experimental system is built to verify the performance of the two-point in-plane control. The results have shown that with the help of adaptive control, the two-point in-plane control is capable of suppressing the vibration of the foundation induced by the in-plane forces acting on the shaft bracket.

New Control Algorithms for Semi-Active Dynamic Vibration Absorbers

1995 ◽  
Author(s):  
M. Abé ◽  
T. Igusa
Keyword(s):  
Vibration Absorber ◽  
Vibration Absorbers ◽  
Dynamic Vibration Absorber ◽  
Single Degree Of Freedom ◽  
Dynamic Vibration ◽  
Passive Devices ◽  
Active Vibration ◽  
Zero Values ◽  
Dynamic Vibration Absorbers ◽  
Insight Into

Abstract A semi-active dynamic vibration absorber is proposed for controlling the free-vibration impulse response of structures. It is assumed that (i) the initial displacement for the absorber spring can be set to non-zero values and (ii) the viscous damping coefficient for the absorber damping can be adjusted. The theory is first developed for a single-degree-of-freedom structure, and is then generalized to continuous structures. The extensive use of closed-form analytical results provides useful insight into the complex interaction between the structure and absorber. This makes it possible to solve the design problem without recourse to numerical optimization. The semi-active vibration absorber is found to be far more effective than conventional passive devices.

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