Analytical Method Of Two-dimensional Coupled Vibration Of Vane Rotary Dampers

- Jul 14, 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 G (Blade-ground) type vane-edge plate damper is established by attaching two vertical spring damping units to the blade flange plate to simulate the two-dimensional dry friction force in blade vibration. 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. IWAN[1] The parallel and series model of the spring is proposed to simulate one-dimensional frictional contact, and the one-dimensional local sliding of Menq and other 2 quasi frictional contact surfaces; the Svanberg and Gao Deping [3-4] have done an important research on the A-D local sliding, and put forward a one-dimensional analytic friction model. With the deep research, one-dimensional friction model can not solve the problem of blade coupling vibration is more obvious, and the blade is not one-dimensional vibration.Vane Rotary Dampers

            In order to get close to the engineering practice, the vibration damping characteristics of blade coupling are studied, Tan Yingchun, Yan Pingping and Zhu Zigen [5-7] based on the two-dimensional integral sliding model, the formula for calculating the frictional force of the Ji Weiping surface is deduced. It lays an important foundation for the two-dimensional local sliding model; Griffin] The control of structural vibration response when the contact point is made circular motion, menq and so on [9] simplifies the contact point into elliptical motion, Sanliturk et [10] The idea of establishing a two-dimensional local sliding model is presented, and the vibration characteristics of the mass-spring system are studied.Vane Rotary Dampers

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