【摘要】 对拟负刚度阻尼减振结构的动力特性与减振效果进行了研究。首先,证明了采用拟负刚度控制方法时,结构响应与外荷载之间满足齐次性;其次,对拟负刚度阻尼减振结构的加速度放大系数和位移放大系数进行了研究,并与粘滞阻尼减振结构的加速度放大系数和位移放大系数进行了比较;最后,对地震荷载作用下拟负刚度阻尼减振结构的减振效果进行了分析。研究结果表明:当外荷载与结构的频率比大于1或结构的周期较长时,拟负刚度控制对结构绝对加速度的控制效果要好于粘滞阻尼减振结构的控制效果,对结构位移的控制效果要差于粘滞阻尼减振结构的控制效果。更多还原

【Abstract】 Dynamic characteristics and control performance of structures with pseudo-negative stiffness dampers are studied.First,the homogeneity between structural response and external loading is proved when the pseudo-negative stiffness control is used.Second,acceleration and displacement magnification factors of a structure with pseudo-negative stiffness dampers are studied.The acceleration and displacement magnification factors are compared with those of a structure with viscous dampers.Third,the control effect of the structure with the pseudo-negative stiffness dampers subject to earthquake is studied.The results show that the control effect of the pseudo-negative stiffness control on absolute acceleration is better than that of the viscous damper control,but the control effect on displacement is worse than that of the viscous damper control when the frequency ratio between loading and a structure is greater than 1 or the period of the structure is relatively long.更多还原