基于压电纤维复合材料半主动干摩擦阻尼器的设计与实验研究

wavy flexible dry friction damper with Macro-Fiber Composite （MFC） was designed for the vibration suppression of thin-walled structures. The structural form and driving principle of the wavy semi-active friction damper （WSAFD） were presented. Subsequently， quasi-static experiments were conducted to investigate the relationship between input voltage and output normal force of the damper under various voltage sequences， to reveal the hysteresis nonlinearity of MFC-driven deformation. Based on this， a locally linearized driving strategy was proposed to avoid the challenges posed by hysteresis nonlinearity in normal force control. Furthermore， vibration experiments were carried out on a cantilever beam with the WSAFD. Results show that under the design condition， the proposed damper has good damping effect， providing over 79% vibration peak reduction with less than 5% additional mass. The WSAFD significantly broadened the effective working range. When the vibration level was approximately 9 times higher than the design value， MFC-driven adjustment of normal force still provided over 75% vibration reduction， avoiding damping effect attenuation. The WSAFD is effective for both design and non-design working conditions.