【摘要】 概括了当前基于振动的结构损伤检测和状态监控方法 ,比较了优缺点。通过对由压电陶瓷驱动的单自由度弹簧 质量 阻尼系统的分析 ,介绍动态系统分析的阻抗方法 ,指出压电驱动/传感器同结构相互作用对整个动态系统的影响。基于压电材料良好的机电耦合特性 ,将反映结构特性的压电材料电阻抗测量替代机械阻抗测量 ,从而进行损伤检测。阻抗分析技术的应用实例表明了其可行性更多还原

【Abstract】 The vibration based analysis methods for damage identification and health monitoring of structure were summed up. By analyzing the piezoelectric(PZT) actuator driven one degree of freedom spring mass damper system (SMD), the impedance method and the influence of the interaction between PZT actuator/sensor and original structure on the whole system were presented. Because of the good coupling property of piezoelectric material, electric impedance measurement was applied instead of mechanical impedance measurement to show the characteristics of the structure and damage identification was realized. Practical applications of impedance method showed its feasibility.更多还原