Parameter Optimization of MDVA Applied in Box Girder Based on Multi-modal Control Theory and the Analysis of Effect on Low Frequency Vibration

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (23) : 107-113.

ZHOU Li, ZHANG Tianqi, LUO Yanyun

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Abstract

As multiple dynamic vibration absorbers (MDVA) have features of good vibration reduction effect and mass dispersion, here, MDVA’s parameters were reasonably optimized to reduce vibration of box girder’s components within multi-frequency bands under vehicle loads.Firstly, based on the fixed-point theory of a single-DOF system and the multi-DOF multi-mode control theory, the MDVA parametric optimization method for multi-objective mode was deduced.Secondly, the vehicle-rail-bridge finite element model was established.According to vibration spectrum and modal characteristics of box girder obtained with simulation, MDVA parameters and installation location were reasonably set up.Finally, the differences (1-250 Hz) between vibrations of box girder with and without MDVA were compared.Results showed that MDVA have better vibration absorption effect on multi-band responses of box girder; dynamic response results of rail and wheel reveal MDVA have a certain suppressing effect on their low frequency vibration.

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multiple dynamic vibration absorbers (MDVA) / multi-mode control theory / parametric optimization / effects on low frequency vibration

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ZHOU Li, ZHANG Tianqi, LUO Yanyun. Parameter Optimization of MDVA Applied in Box Girder Based on Multi-modal Control Theory and the Analysis of Effect on Low Frequency Vibration[J]. Journal of Vibration and Shock, 2020, 39(23): 107-113

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