【摘要】 基于我国现行的风荷载规范,建立了在风荷载作用下结构-主动调谐质量阻尼器(ATMD)系统的动力方程。定义ATMD最优参数准则为:结构-ATMD系统的位移或加速度响应方差的最小化。ATMD有效性的评价准则为:设置ATMD结构的最小化位移或加速度响应方差与未设置ATMD结构的位移或加速度响应方差之比(分别称为位移和加速度减振系数)。根据上述准则,在频域内数值研究了结构自振频率、标准化加速度反馈增益系数、质量比对ATMD系统的最优参数(包括最优频率比和阻尼比)、有效性和冲程的影响。此外,为了比较的目的,论文同时考虑了结构TMD风致振动控制的情况。更多还原

【Abstract】 Based on the current Chinese wind load codes,the motion equations of the structure-active tuned mass damper(ATMD) system are established.The criterion for searching the optimum parameters of the ATMD is defined as the minimization of the variance of displacement or acceleration response of the structure with the ATMD.The criterion used to evaluate the effectiveness of the ATMD is the ratio of the minimum displacement or acceleration variance of the structure with the ATMD to the displacement or acceleration variance of the structure without the ATMD(referred respectively to as the displacement or acceleration reduction factor).With resorting to the aforementioned criteria,in the frequency domain,the influences of the parameters including natural frequency,normalized acceleration feedback gain factor(NAFGF),and mass ratio on the optimum parameters(i.e.both the optimum frequency ratio and damping ratio),control effectiveness,and stroke of the ATMD have been investigated.Furthermore,for the purpose of comparisons,the TMD is also taken into consideration for the reduction of vibrations of structures under wind loads.更多还原