Investigation of Structure‐Borne Active Vibration Dampers

1965 ◽  
Vol 38 (4) ◽  
pp. 623-628 ◽  
Author(s):  
T. H. Rockwell
Keyword(s):  
Active Vibration ◽  
Vibration Dampers

scholarly journals Performance of a Suspension Bridge with Active Vibration Dampers

2018 ◽  
Vol 196 ◽  
pp. 01017
Author(s):  
Anatolij Konovalov ◽  
Marina Pustovalova
Keyword(s):  
Cross Sections ◽  
Dynamic Properties ◽  
Suspension Bridge ◽  
Suspension Bridges ◽  
Initial Model ◽  
Strain Behavior ◽  
Pedestrian Bridges ◽  
Active Vibration ◽  
Active Damper ◽  
Vibration Dampers

Suspended structures that are used extensively in construction of motorway and pedestrian bridges allow bridging wide spans without having to install intermediate supports. Being less stiff in comparison to girder and arch bridges, suspension bridges require their dynamic properties to be controlled [1, 2]. This is a vital task when it comes to suspension bridges. Several engineering arrangements are available to control the dynamic properties of the structures [3]. This paper addresses the use of active dampers [4] installed on the tops of the towers as the means to control vibrations of a suspension bridge. To this end, a planar 3D model of suspension bridge was built using ANSYS software. The authors compared stress-strain behavior and dynamic properties of the models with and without active vibration dampers. In contrast to the initial model, the model of a bridge equipped with active dampers exhibits less displacement in all cross-sections. Thus, the displacements are reduced 1.7 times in the middle of the central span of suspended stiffening truss; 2.7 times in the middle of the end span; and displacements of the top of the bridge tower are 1.6 times less. The modal analysis has shown that in the model with active dampers the frequency of transverse vibrations at the tower tops has increased 1.9 times, while vertical vibrations have increased within 23%. Under maximum applied overpressure in the active damper, torsional vibrations of the structure have increased 2.4 times as compared to the initial model. The results obtained by the authors allow for the conclusion that active dampers are useful tools for controlling the dynamic properties of a suspension bridge.

scholarly journals Efficiency of active vibration dampers for ship structures

2019 ◽  
Vol 2 (388) ◽  
pp. 150-158
Author(s):  
V. Belov ◽  
◽  
A. Gladilin ◽  
V. Maslov ◽  
A. Petrov ◽  
...  
Keyword(s):  
Ship Structures ◽  
Active Vibration ◽  
Vibration Dampers

Optical table with embedded active vibration dampers (smart table)

2005 ◽  
Author(s):  
Vyacheslav M. Ryaboy ◽  
Prakash S. Kasturi ◽  
Adrian S. Nastase ◽  
Thomas K. Rigney
Keyword(s):  
Optical Table ◽  
Active Vibration ◽  
Vibration Dampers

Stability and Effectiveness of Active Vibration Dampers

1963 ◽  
Vol 35 (5) ◽  
pp. 797-797
Author(s):  
James M. Lawther ◽  
Thomas H. Rockwell
Keyword(s):  
Active Vibration ◽  
Vibration Dampers

Remote diagnostics of vibrations of dynamic objects by Doppler microwave sensors

Metrologiya ◽  
2020 ◽  
pp. 25-42
Author(s):  
Dmitrii V. Khablov
Keyword(s):  
Intelligent Systems ◽  
Electromagnetic Waves ◽  
Continuous Monitoring ◽  
Phase Changes ◽  
Vibration Diagnostics ◽  
Remote Diagnostics ◽  
Active Vibration ◽  
Dynamic Objects ◽  
Microwave Sensors ◽  
Non Destructive

This paper describes a promising method for non-contact vibration diagnostics based on the use of Doppler microwave sensors. In this case, active irradiation of the object with electromagnetic waves and the allocation of phase changes using two-channel quadrature processing of the received reflected signal are used. The modes of further fine analysis of the resulting signal using spectral or wavelet transformations depending on the nature of the active vibration are considered. The advantages of this non-contact and remote vibration analysis method for the study of complex dynamic objects are described. The convenience of the method for machine learning and use in intelligent systems of non-destructive continuous monitoring of the state of these objects by vibration is noted.

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