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  • Users: mcatltu
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  1. mcatltu

    Oil film stiffness and damping coefficients

    Hello, I have a question about calculating oil film stiffness and damping coefficients. From literature, it says that Kxx = dFx/dx Kxy = dFx/dy Kyx = dFy/dx Kyy = dFy/dy Cxx = dFx/dxdot Cxy = dFx/dydot Cyx = dFy/dxdot Cyy = dFy/dydot My question is that if you have a limit cycle (journal...
  2. mcatltu

    Hydrodynamics.... Help please

    Hello all, I have a question about one small thing. In literature, it says that linear analysis of hydrodynamic becomes nonlinear if the amplitude is larger than 40%. My question is how do you measure this amplitude? Thanks for any replies!!
  3. mcatltu

    Oil whirl Help!!!

    Hi, I have a question about cascade plot. Cascade plot is usually for an imbalance rotors. Why is there a peak at 1x at low frequency? Also is it possible to have 1x without imbalance?

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