【摘要】 基于对压电陶瓷驱动器和金属摩擦阻尼器力学性能的分析,将两者结合并提出智能压电摩擦阻尼器,通过合理设定压电驱动器电场强度与阻尼器相对位移和速度的系数,提出了位移和速度相关型、具有拟粘滞或拟摩擦阻尼力模型的压电摩擦阻尼器,并建立了相应的半主动控制的阻尼力规则。对两自由度结构地震反应的压电摩擦阻尼半主动控制和多种被动阻尼控制进行了分析和比较。结果表明:半主动和拟粘滞型压电摩擦阻尼均对结构的位移和加速度反应有良好的控制效果。更多还原

【Abstract】 Based on the mechanical properties analysis of piezoelectric ceramic actuator and metal friction damper, the smart piezoelectric-friction damper is introduced. Pseudo-viscous or pseudo-frictional piezoelectric-friction damper is put forward which is either displacement dependent or velocity dependent by properly setting the relationship between the electrical intensity of piezoelectric ceramic actuator and the relative displacement or velocity of damper, and the relative semi-active control rules are also discussed. Under earthquake excitations, for a two degrees of freedom system with piezoelectric-friction dampers, the analytical comparisons between semi-active control and several types of passive damping control of structural response show that semi-active and pseudo-viscous piezoelectric-friction dampers are both effective for reducing structural displacement and acceleration response.更多还原