Acceleration through critical speeds of an anisotropic, non-linear, torsionally stiff rotor with many degrees of freedom

摘要: It is well known that the amplitude of unbalance response a rotor which runs through critical speed can be reduced by increasing value acceleration. However, models are used for computation only constant running, and solutions dealing with accelerating rotors found in literature refer to very simple geometrical layouts. The aim work reported here extend usual mathematical based on finite element method study dynamic behaviour non-constant angular speed. Both non-linear its or inertial anisotropy have been taken into account. case torsionally stiff running given law ω(t) studied detail. Several examples, including practical one complex bearings, conclude work.