Performance Establishment Of Vane Rotary Dampers

- Sep 22, 2017 -

     A two-dimensional local sliding friction contact model is established by using a parallel spring with a sliding contact to simulate the frictional contact between blades and dampers in two-dimensional planar motions. The finite element model of the blade-edge plate damper was established by adding two vertical spring damping units to simulate blade vibration in the blade flange plate.Vane Rotary Dampers

    Combined with two models, a method for analyzing the damping characteristics of Blade edge plate damper in two-dimensional coupled vibration is presented. An example analysis shows that there is a positive pressure range near the operating frequency, so that the steady amplitude damping effect of the two-dimensional coupled vibration is the best, and the frequency has no obvious effect on the steady amplitude damping characteristics. The analysis method is suitable for the analysis of coupling vibration of blade edge plate damper in various complex plane friction contact.Vane Rotary Dampers

    The additional dry friction damper is an effective method to restrain the vibration of aero-engine blades at the blade flange. The research shows that establishing a scientific and accurate frictional contact model is the key to the calculation and analysis of this kind of damper. , a parallel and series model of spring is proposed to simulate one-dimensional frictional contact. Vane Rotary Dampers

     The blade finite element model is established, and the equivalent damper with two perpendicular spring damping units is added as the boundary condition of the finite element method in the blade flange contact. In this paper, the frictional contact model and the finite element model are used to establish the blade coupling vibration analysis method, and the vibration damping characteristics and frictional contact characteristics of the blade at operating frequency and nearby steady state amplitude are studied.Vane Rotary Dampers

    Firstly, the finite element model of blade-damper structure is established, and the results show that the friction force is mainly manifested by stiffness and damping. The dry friction in x and y directions is simulated by attaching two vertical spring damping units along the center node under the flange plate, and the other end of the spring damping Unit is fixed.Vane Rotary Dampers


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