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Purpose <p>A neoteric initiative for torsional oscillation control of a damped large-size rotor is proposed using the multiple dynamic vibration absorbers system (MDVA).</p> Methods <p>The complex amplitude method is used to determine the general dynamic behavior of the damped large-size rotor fitted with the MDVA system. A tantamount un-damped large-size rotor model of the primordial damped large-size rotor is determined by the least squares criterion (LSC) of the equivalent linearization procedure (ELP) to create simplicity in solving optimization problems. An extension of the fixed points method is used to optimize the parameters of the MDVA system.</p> Results <p>Two analytical expressions of the optimal tuning parameter and damping ratio of the MDVA system are obtained to control the torsional oscillation of the large-size rotor. Numerical investigation results have verified that the dynamic behaviors of the torsional oscillation of the large-size rotor in the resonant frequency region have been amazingly suppressed by using the optimal parameters of the MDVA system suggested in this article. In addition, the vibration control efficiency of the MDVA system is significantly improved (about 47.82%) when the number of dynamic vibration absorbers is increased from 2 to 8 sets. The sensitivity analysis results for the optimal parameters of the MDVA system indicate that the optimal expressions provided by the least squares criterion are very close to the actual investigation results.</p> Conclusions <p>Using the MDVA system to control the torsional oscillation of the damped large-size rotor is an effective initiative. The least squares criterion combined with the fixed point method extension is a robust tool for designing optimal parameters of the MDVA system. The significant advantage of the MDVA system is that each of its single dynamic vibration absorbers (SDVAs) is compact and can be manufactured as independent modules for easy assembly. Manufacturing the stiffness and damper components of each SDVA is simpler than manufacturing them for a large DVA. The results of this study contribute a strong option for optimal control of the torsional oscillation of the damped large-size rotor.</p>

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A Neoteric Initiative for Torsional Oscillations Control of a Damped Large-size Rotor by the Multiple Dynamic Vibration Absorbers System

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Vu Duc Phuc

摘要

Purpose

A neoteric initiative for torsional oscillation control of a damped large-size rotor is proposed using the multiple dynamic vibration absorbers system (MDVA).

Methods

The complex amplitude method is used to determine the general dynamic behavior of the damped large-size rotor fitted with the MDVA system. A tantamount un-damped large-size rotor model of the primordial damped large-size rotor is determined by the least squares criterion (LSC) of the equivalent linearization procedure (ELP) to create simplicity in solving optimization problems. An extension of the fixed points method is used to optimize the parameters of the MDVA system.

Results

Two analytical expressions of the optimal tuning parameter and damping ratio of the MDVA system are obtained to control the torsional oscillation of the large-size rotor. Numerical investigation results have verified that the dynamic behaviors of the torsional oscillation of the large-size rotor in the resonant frequency region have been amazingly suppressed by using the optimal parameters of the MDVA system suggested in this article. In addition, the vibration control efficiency of the MDVA system is significantly improved (about 47.82%) when the number of dynamic vibration absorbers is increased from 2 to 8 sets. The sensitivity analysis results for the optimal parameters of the MDVA system indicate that the optimal expressions provided by the least squares criterion are very close to the actual investigation results.

Conclusions

Using the MDVA system to control the torsional oscillation of the damped large-size rotor is an effective initiative. The least squares criterion combined with the fixed point method extension is a robust tool for designing optimal parameters of the MDVA system. The significant advantage of the MDVA system is that each of its single dynamic vibration absorbers (SDVAs) is compact and can be manufactured as independent modules for easy assembly. Manufacturing the stiffness and damper components of each SDVA is simpler than manufacturing them for a large DVA. The results of this study contribute a strong option for optimal control of the torsional oscillation of the damped large-size rotor.