变弯度导叶对风扇转子叶片强迫振动的影响

In terms of the aeroelastic problem caused by the wake excitation of variable camber guide vanes，forced vibration analysis of a 1.5 stage fan rotor was conducted with the utilization of the time transformation method and the harmonic response method. The effect of variable camber guide vane angle on the aerodynamic performance and vibration characteristics of the downstream rotor blade was studied. Results indicate that as the guide vane open，the mass flow rate，pressure ratio，and efficiency all increase. Adjusting the guide vane has a greater impact on the root area of the rotor blade. For aerodynamic excitation，as the guide vane closes，the aerodynamic amplitude of the rotor blade increases and the phase changes sharply. The angle of the guide vane has little effect on the aerodynamic damping of the higher-order modes of concern. With the closing of guide vanes，the aerodynamic damping decreases slightly. Overall，the greater the deviation of the guide vane angle from the design angle，the higher the vibration response of the downstream rotor blade. It is considered that there is an optimal angle to minimize the vibration stress of the rotor blade.