颗粒调谐质量阻尼器减震控制的数值模拟

摘要

提出一种颗粒调谐质量阻尼器，即通过摆绳将颗粒阻尼器悬挂于主体结构上，将目前广泛应用的调谐质量阻尼器与减震效能优越的颗粒阻尼器结合起来，以扩大减振频带，增加减振鲁棒性。基于一定的等效原则将多颗粒阻尼器等效为单颗粒阻尼器，提出一种近似的颗粒调谐质量阻尼器数值模拟方法，并介绍了系统参数的取值方法。进行了附加颗粒调谐质量阻尼器的单自由度结构实际地震输入下的振动台试验，通过对比试验结果与数值模拟结果，发现两者吻合较好，说明该简化方法可以较好地模拟颗粒调谐质量阻尼器的减震控制效果。%A particle tuned mass damper was proposed by hanging a particle damper on a main structure through a string.It combines a widely used tuned mass damper with an efficient particle damper in vibration control area.Thus it is able to increase the robustness of damping performance within a wider frequency band.Here,an approximate numerical simulation method for particle tuned mass dampers was proposed based on an equivalent priciple to take a multi-particle damper as an equivalents single-particle damper.The method to determine the corresponding system parameters was also introduced.A series of shaking table tests of a single DOF structure attached with a particle tuned mass damper under seismic imputs were performed.A comparative study showed that the simulation results agree well with the test ones,so the proposed simplified method can be used to simulate vibration reduction control effects of particle tuned mass dampers.