Research on Damping Vibration Reduction Design Method of Aeroengine Supporting Structure System

The typical high thrust-to-weight ratio turbofan engine support structure system is lighter and the structure is mainly composed of plate and shell parts. Under the action of different frequency loads, the local vibration response of the support structure is too large. Aiming at its excessive vibration response, a structural vibration response control method based on dry friction damping is proposed. Under the condition of not losing the dynamic stiffness of the supporting structure, a dry friction damper with dynamic suction is designed On the rotor support structure to enhance the damping characteristics of the rotor supporting structure system in the wide frequency domain, so as to realize the effective control of the vibration response of the supporting structure in the working speed frequency. Through theoretical model and simulation analysis, the influence law of friction contact characteristics and damper structure characteristics on damping effect is described quantitatively, and further put forward the design idea and process of damping structure damping of supporting structure. The calculation results show that the contact friction of the dry friction damper can consume the vibration energy of the supporting frame, and the reasonable design of the contact characteristic parameters and geometric configuration parameters of the damper will further optimize the vibration reduction effect, which will provide engineering value for the vibration response control design of supporting structure system of the aeroengine.