基于TMD的车致箱梁振动控制模型试验研究

Model Test Research on Vibration Control of Vehicle‑Induced Box Girders Using TMD

为研究调谐质量阻尼器(tuned mass damper,简称TMD)在控制轨道箱梁结构振动中的应用,以高速动车组和CRTS-Ⅱ型板式无砟轨道-箱梁结构为原型,设计制作了几何相似比为10∶1的车-轨-桥耦合振动缩尺模型系统,分析了TMD在不同质量比、不同位置以及不同安装数量等工况下对箱梁顶板和翼板的减振效果。结果表明:TMD质量比为0.02时减振效果优于质量比为0.01时的减振效果,在考虑结构安全及经济性的条件下,可优先选择质量比更大的TMD;不同TMD安装位置对箱梁各部件的减振效果不同,安装TMD的板件处振动响应得到了明显抑制;安装2个TMD对箱梁结构的减振效果优于安装1个TMD,其减振范围也有所提升。研究结论可为高架轨道箱梁结构的减振设计提供参考。

To explore the application of tuned mass damper(TMD)for controlling vibrations in rail box girder structures,a scaled model system for vehicle-rail-bridge coupling vibrations with a geometric similarity ratio of 10∶1 is designed and manufactured based on the high-speed electric multiple units and CRTS-II plate ballastlesstrack-box girder structure,and the vibration damping effect of TMD on the roof plate and wing plate of box girder under different working conditions is analyzed,including different mass ratios,different positions and different installation quantities.The results show that the vibration damping effect when the TMD mass ratio is 0.02 is better than the vibration damping effect when the mass ratio is 0.01,and TMD with a larger mass ratio can be preferred under the condition of considering structural safety and economy;different TMD installation positions have different damping effects on the components of the box girder,and the vibration response at the installation of TMD plates is significantly suppressed;the vibration damping effect of installing two TMDs on the box girder structure is significantly better than that of installing one TMD,and its damping range is also im‑proved.The research conclusion can provide a reference for the damping design of elevated rail box girder structure.