钢拱桥刚性细长吊杆减振用调谐质量阻尼器的试验研究

针对钢拱桥刚性细长吊杆空气动力性能较差的问题,给出了采用调谐质量阻尼器(TMD)的吊杆减振初步设计方法,并研制了适用于吊杆减振的永磁式电涡流TMD样机。不仅实现了TMD刚度与阻尼的完全分离,且阻尼很容易地通过调整磁场间隙进行调节。试验与分析结果表明,研制的TMD具有较好的耐久性与工程应用可行性。

Experimental study on tuned mass dampers for vibration control of rigid slender suspenders in steel arch bridges

In view of poor aerodynamic performance of rigid slender suspenders commonly used in steel arch bridges, preliminary parameter design of tuned mass dampers (TMD) for wind induced vibration control of such suspenders is firstly proposed. On this basis, tuned mass dampers with eddy current damping are developed to satisfy the requirements of vibration mitigation of suspenders. The advantages of the proposed TMD is that on one hand damping and stiffness components are thoroughly separated, on the other hand damping ratios can be easily adjusted by changing the magnetic gap between permanent magnets and conductor plates. Test and analysis results show that the developed TMD has good durability and feasibility for engineering applications.