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

周力,张天琦,罗雁云

振动与冲击 ›› 2020, Vol. 39 ›› Issue (23) : 107-113.

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (23) : 107-113.
论文

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

  • 周力,张天琦,罗雁云
作者信息 +

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

  • ZHOU Li,   ZHANG Tianqi,  LUO Yanyun
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文章历史 +

摘要

由于多重动力吸振器(MDVA)具有减振效果好、吸振器质量分散的特点,因而,将通过MDVA的参数合理优化进而降低车辆载荷作用下箱梁各板件多个频段内的振动作为研究的主要内容。首先,基于单自由度系统定点理论与多自由度多模态控制理论,推导了多目标模态的MDVA的参数优化方法;其次,建立车-轨-桥有限元模型,根据仿真得到的箱梁振动频谱特征与模态特征,合理设置MDVA参数与安装位置,并对比了有无MDVA工况下箱梁的振动差异(1-250Hz),结果表明,MDVA对箱梁多个频段均有较好的吸振效果。此外,钢轨与车轮的动力响应结果表明,MDVA对二者的低频振动同样有一定的抑制效果。

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.

关键词

多重动力吸振器
/ 多模态控制 / 参数优化 / 低频振动影响

Key words

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

引用本文

导出引用
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[J]. Journal of Vibration and Shock, 2020, 39(23): 107-113

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