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.
周力，张天琦，罗雁云. 基于多模态控制理论的箱梁MDVA参数优化及对低频振动影响分析[J]. 振动与冲击, 2020, 39(23): 107-113.
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. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(23): 107-113.
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