颗粒阻尼器减震控制的数值模拟

Numerical simulation of the vibration control effects of particle dampers

摘要:

基于离散单元法，建立了颗粒阻尼器对多自由度结构进行减震控制的数值模拟方法，并介绍了系统参数的取值方法。该方法采用合理的计算时步和高效的接触检测算法，能较好的模拟颗粒间以及颗粒与容器壁之间的相互作用。开展了附加颗粒阻尼器的多层框架的振动台试验，通过试验结果与数值模拟结果的对比发现两者吻合良好，说明该数值方法可以较好地模拟颗粒阻尼器的减震控制效果。

Abstract:

Based on the discrete element method, a numerical simulation method of the vibration control effects of particle dampers is established, and the method of determining the corresponding system parameters is introduced. In this method, a suitable particle damper system is modeled, a reasonable time step is determined, an efficient contact detection algorithm is adopted, and the interactions between particles and the container are represented. A shaking table test of a multi-storey frame with particle damper system is carried out. Compared the test results and the simulation results, they are agree well with each other, which demonstrates that the proposed numerical simulation method can yield reasonably accurate estimates of control effects of particle dampers.