scholarly journals ON A METHOD FOR OPTIMIZING DESIGN OF ANALYZING TORSIONAL VIBRATION ABSORBER

2021 ◽  
Vol 12 (5) ◽  
Author(s):  
Quoc-Manh Nguyen
Keyword(s):  
Torsional Vibration ◽  
Vibration Absorber ◽  
Optimizing Design

The Tuned and Damped Gyrostatic Vibration Absorber

1947 ◽  
Vol 157 (1) ◽  
pp. 1-19 ◽  
Author(s):  
R. N. Arnold
Keyword(s):  
Theoretical Prediction ◽  
Torsional Vibration ◽  
Forced Vibration ◽  
Theoretical Study ◽  
Experimental Investigations ◽  
Vibration Absorber ◽  
Viscous Damping ◽  
Mean Velocity ◽  
Mass System ◽  
Low Frequencies

The vibration absorber described in this paper consists of a gyrostat suspended symmetrically about an axis perpendicular to that of the torsional vibration which it is desired to suppress. The gyrostat is fitted with springs and a viscous damping mechanism which allow limited vibration about its axis. This device is a modification of that employed by Schlick (1904)†, in his attempt to stabilize the rolling of ships at sea. The new arrangement, however, is more efficient, is not restricted to very low frequencies, and is, in general, capable of application to vibration superposed on a mean velocity. A theoretical study is made of the response of such an absorber to one- and two-mass vibratory systems under both forced and self-induced vibration, and design methods are derived by which the essential dimensions for any given application may be readily determined. Experimental investigations with a gyrostatic absorber applied to a one-mass system under forced vibration are recorded, and the results compared with theoretical prediction. The design of a full-scale absorber built to suppress vibration of the table of a heavy planing machine is also given, together with the results obtained with the apparatus on trial.

Semi-active vibration control of a transmission system using a magneto-rheological variable stiffness and damping torsional vibration absorber

2021 ◽  
pp. 095440702199949
Author(s):  
Wenfeng Li ◽  
Xiaomin Dong ◽  
Jun Xi ◽  
Xiong Deng ◽  
Kaiyuan Shi ◽  
...  
Keyword(s):  
Active Control ◽  
Torsional Vibration ◽  
Variable Stiffness ◽  
Transmission System ◽  
Vibration Absorber ◽  
Experimental Setup ◽  
Variable Damping ◽  
Independent Variable ◽  
Magneto Rheological ◽  
Stiffness And Damping

In this research effort, an innovative magneto-rheological variable stiffness and damping torsional vibration absorber (MR-VSDTVB) is proposed, and independent variable damping control and independent variable stiffness control are adopted to suppress the torsional vibration of the transmission system. MR-VSDTVB, based on semi-active control principle, exhibits a compact structure and integrates with magneto-rheological technology. First, the concept of MR-VSDTVB is discussed, and the output torque characteristic of MR-VSDTVB is analytically developed. Then, a prototype is fabricated and tested. A transmission system with MR-VSDTVB is proposed to verify the MR-VSDTVB's effectiveness. The structure and inherent characteristics of the transmission system are analyzed theoretically. Finally, an experimental setup of transmission system with MR-VSDTVB is built. Experimental results indicate that when torsional stiffness of MR-VSDTVB changes, a frequency shift phenomenon occurs; moreover, when torsional damping of MR-VSDTVB changes, the response amplitude of the experimental setup changes regularly; And finally, the on-off control test validates the effectiveness of semi-active control on the torsional vibration suppression of the transmission system. The above results verify the effectiveness of MR-VSDTVB in suppressing the torsional vibration of the transmission system. These findings are expected to expand the application of magneto-rheological technology and variable stiffness and variable damping technology in torsional vibration of transmission systems.

728 Dynamic Torsional Vibration Absorber by Wave Control

2000 ◽  
Vol 2000.75 (0) ◽  
pp. _7-61_-_7-62_
Author(s):  
Muneharu SAIGO ◽  
Yoshihiro KIKUSHIMA
Keyword(s):  
Torsional Vibration ◽  
Vibration Absorber ◽  
Wave Control

Implementation of a Nonlinear Torsional Vibration Absorber for Suppression of Vibrations in Rotating Machinery

2013 ◽  
Author(s):  
Ammaar Bin Tahir ◽  
Oleg Shiryayev ◽  
Nader Vahdati ◽  
Hamad Karki
Keyword(s):  
Nonlinear Vibration ◽  
Torsional Vibration ◽  
Vibration Suppression ◽  
Nonlinear Energy Sink ◽  
Modal Parameters ◽  
Vibration Absorber ◽  
Primary System ◽  
Vibration Absorbers ◽  
Modal Model ◽  
Linear Spring

Tuned mass dampers (TMD) utilizing linear spring mechanisms to mitigate destructive vibrations are commonly used in practice. A TMD is tuned for a specific resonant frequency of a system. Recently, nonlinear vibration absorbers attracted attention of researchers due to some potential advantages they possess over the TMDs. The nonlinear vibration absorber, or the nonlinear energy sink (NES), has an advantage of being effective over a broad range of excitation frequencies, which makes it more suitable for systems with several resonant frequencies. Vibrations dissipation mechanism in an NES is passive and ensures that there is no energy backflow to the primary system. Experimental setup of a rotational system has been designed for validation of the concept of nonlinear torsional vibration absorber. Dimensions of the primary system have been optimized so as to get the first natural frequency of the system to be fairly low. This was done in order to excite the dynamic system for torsional vibration response by the available motor. Experiments have been performed to obtain the modal parameters of the system. Based on the obtained modal parameters, we carry out the design optimization of the nonlinear torsional vibration absorber using an equivalent 2-DOF modal model. A linear vibration absorber is developed in parallel. Subsequently, both absorbers will be manufactured, assembled and mounted on the system to evaluate their vibration suppression capabilities.

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