Study on active & passive vibration reduction technology of composite fan blades based on MFC

With the development of the performance of aeroengine fan blades, composite materials have become the first choice of fan blades. However, in the process of operation, the fan blades are excited by complex loads, which will produce obvious vibration. MFC(Macro Fiber Composite) has both positive and negative piezoelectric effects. Therefore, MFC can be used for active control and passive vibration reduction of composite fan blades. Based on the macro fiber composite (MFC), the research on the active and passive vibration reduction technology of composite fan blades is carried out by using numerical simulation and experimental methods. The specific contents are as follows: The analysis model of active and passive vibration reduction of composite fan blades is established, the natural frequency, mode, modal strain and other information of composite components are obtained, and the determination method of MFC sticking position based on modal strain distribution is established, the influence mapping of active and passive vibration reduction effect of MFC is analyzed, and the analysis model is verified by composite laminated plate structure. The MFC passive vibration reduction test of composite fan blades was carried out, and the LC circuit based on MFC was designed and constructed.