真円すべり軸受で支持されたロータ系の最適ダンパ軸受の設計法

概要

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The vibration control effect of damper bearings is analyzed by a new analysis method that does not need to solve complex inherent values for the single-disk flexible rotor supported by cylindrical bearings. The following assertions can be made: (1) In order to improve the vibration response of damper bearings at the critical speeds, the viblation response of the main bearing must be improved. (2) Increase in the dimensionless shaft stiffness coefficient K_s spreads the region of Q ≤ 8 in the map of Q-factors. (3) The dimensionless system number W_b has the optimum value that spreads mostly throughout the region of Q ≤ 8 in the map of Q-factors, and the value is 0.2〜1.0. (4) In the optimum design of damper bearings, the design needs to consider the region near K_b = 0.1 and D_a = 0.2 (K_b: stiffness ratio, D_a: dammping ratio) in Q-factors map, where the value of the Q-factor is below 2 in the region.
1991-08-25