Design of a damped vibration absorber to control the resonant vibration of roll

Wang, Ming; Xu, Huidong; He, Dongping; Wang, Tao; Zhang, Jianwen

doi:10.1016/j.ymssp.2022.109262

Cited by 20 publications

(4 citation statements)

References 43 publications

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“…The latching time instants for all the strategies are the same. The latching moment is at the time instant when the LMD relative velocity is 0 [5].…”

Section: Simplified Model Of Lmdmentioning

confidence: 99%

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Innovative wave energy converter inspired latched mass damper for vibration control

Wang,

Zhu

2024

Active and Passive Smart Structures and Integrated Systems XVIII

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Traditional vibration control dampers are sensitive to frequency modulation and very difficult to achieve long-period frequency modulation. The control effects of traditional dampers are not ideal in the face of complex and variable loads, and their robustness is low. Latching control is a phase optimization method applied in wave energy converters (WECs). Based on the latching control of WEC, this paper proposed the latched mass damper (LMD) and three different control strategies for the optimization of vibration control. The LMD can directly extend the periods to match well with the longperiod vibrations by introducing the latching forces. First, the theoretical model of LMD is established and analyzed. Then, the dynamic performances of LMDs with different strategies are compared. The results indicate that the proposed LMD and strategies for vibration control are feasible. The proposed latching control mechanism and strategies can provide an innovative solution for improving the efficiency of high-frequency detuned dampers, designing of long-period dampers with limited stroke spaces, and adaptive semi-active dampers in the future.

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“…The latching time instants for all the strategies are the same. The latching moment is at the time instant when the LMD relative velocity is 0 [5].…”

Section: Simplified Model Of Lmdmentioning

confidence: 99%

“…Note: some contents of this paper have already been published by the authors in reference [5]. *okhao.wang@connect.polyu.hk; phone (+852) 5974 2466…”

Section: Introductionmentioning

confidence: 99%

Innovative wave energy converter inspired latched mass damper for vibration control

Wang,

Zhu

2024

Active and Passive Smart Structures and Integrated Systems XVIII

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“…There even exist a few cases, where some specific operating points of a machine result in a structural instability, which may end up in the worst case of a destruction of the plant. As a counter measure against such unwanted resonance effects so-called vibration absorbers are widely used, which basically represent an oscillating system acting against the resonance of a vibrating primary system or structure, see for instance [1,2,3,4,5,6]. Most vibration absorbers are able to operate at a single frequency and, thus, are designed for one specific working point.…”

Section: Introductionmentioning

confidence: 99%

A Hydro-Mechanic Vibration Absorber With Adjustable Operating Frequency

Kogler,

Winkler,

Plöckinger

2024

14th International Fluid Power Conference

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Unwanted resonances in industrial plants often result in unpleasant noise or may even end up in a reduced lifetime of mechanical structures and components. Such vibrations are often reduced by wellestablished vibration absorbers, which are designed and precisely tuned to one specific frequency. Furthermore, often the natural frequency of, for instance, a mechanical structure is not accurately known and must be identified by an experimental modal analysis. Another limitation of conventional single-frequency absorbers is that in some applications the frequency of the unwanted vibrations varies over lifetime, which reduces the effectiveness of the initially designed absorber. Moreover, in many cases the frequency of the undesirable vibration changes with the operating point of the plant, which requires the installation of multiple vibration absorbers with different operating frequencies. In this paper a new hydro-mechanical vibration absorber with a continuously adjustable operating frequency is presented, which eliminates the shortcomings mentioned above. In contrast to conventional absorbers the stiffness of the hydro-mechanical spring mass absorber is realized by a gas-loaded hydraulic capacitance, which depends on the mean operating pressure. The concept of the presented absorber is investigated theoretically and validated by simulation experiments. The results are discussed in detail and an outlook on further steps in development is provided.

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“…For example, Cui et al [7] analyzed the influence of friction on the vertical vibration of the surface of a working roll under the peeling oxide film of a 1780 mm rolling mill. Wang et al [8] modelled the vertical vibration of a four-high rolling mill under nonlinear stiffness and analyzed the influence of various parameters on the vertical vibration using a damper optimized by an adaptive genetic algorithm. The multiscale weighted permutation entropy was used to effectively characterize rolling mill bearing faults based on the idea of multichannel signal processing [9].…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of rolling mill dynamic stiffness on coupled vibration of hydraulic machine

Wang,

Hou,

Wang

et al. 2024

J. vibroeng.

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The productivity and capacity release of hot-strip rolling is severely limited by pendular vibration. Previous studies on mill vibration have investigated the influence of rolling parameters on vertical vibration; however, the influence of dynamic stiffness compensation factors on vertical vibration has not yet been considered owing to the limitations of modelling methods. Herein, we develop a simulation model of mill liquid–machine coupling with dynamic stiffness compensation using AMESim software. The established simulation model is used to investigate the effect of this dynamic stiffness compensation on mill vertical vibration under conditions of downfeed thickness difference excitation frequency, thickness difference excitation amplitude, thickness difference excitation phase, and dynamic stiffness compensation signal generation hysteresis. Evidently, the impact of the mill stiffness compensation on the mill vertical vibration differs with the thickness of the excitation frequency, and the impact should be discussed according to the excitation frequency segment. The amplitudes of the roll system vibration and incoming thickness difference excitation are essentially linear, whereas the excitation phase does not affect the frequency or amplitude of the mill vibration. The rolling machine stiffness compensation signal hysteresis also has a significant impact on the mill vibration amplitude. Our findings will improve the mechanism of the hot rolling process and suppress droop vibrations.

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Design of a damped vibration absorber to control the resonant vibration of roll

Cited by 20 publications

References 43 publications

Innovative wave energy converter inspired latched mass damper for vibration control

Innovative wave energy converter inspired latched mass damper for vibration control

A Hydro-Mechanic Vibration Absorber With Adjustable Operating Frequency

Study on the effect of rolling mill dynamic stiffness on coupled vibration of hydraulic machine

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