多重调谐质量阻尼器对简支箱型梁结构低频振动控制的仿真研究

为了研究MTMD(多重调谐质量阻尼器)对简支箱型梁低频振动的控制特性,首先通过对箱梁结构进行模态分析确定受控模态,利用经典扩展定点理论进行TMD(调谐质量阻尼器)的最优参数设计,并基于位移振幅最小化的原则,建立评价函数分别进行MTMD的最优参数设计;进而利用有限元分析软件ANSYS进行谐响应分析,研究了TMD的设置个数...

Simulation Research on MTMD Control of Low Frequency Vibration of Simple Support Box Girder

In order to study the characteristics of MTMD control of low-frequency vibration of simple support box girder,firstly,the controlled mode is determined by modal analysis of box girder structure,and the optimal parameters of TMD are designed by classical extended fixed-point theory,and based on the principle of minimizing the displacement amplitude,the evaluation function is established to design the optimal parameters of MTMD.Then the finite element analysis software ANSYS is used to conduct the harmonic response analysis.The influence of TMD number on the vibration control effect is studied,and the parameter sensitivity analysis is conducted targeting quality change,stiffness change and damping change.The research results show that the vibration control effect of MTMD improves with the increase of the number of additional dampers in the case of same additional mass,but the improvement of the vibration control effect is no longer obvious after the number of additional dampers has increased to a certain extent.When mass and stiffness are offset,the vibration control stability decreases with the increase of TMD number,and the vibration control stability improves with the increase of TMD number.