关键词: 转子速度;加速度;临界转速;模态振动试验

Abstract: For a single disc double point support testing rotor with offset disc,the critical speed was obtained by characteristic curve of acceleration and deceleration amplitude frenquency,the offset centre distance and damping ratio of disc was computed by using the modal computer method of amplitude frenquency characteristic curve and the transfer matrixes of lateral/torsional coupling was used to calculate critical speed and static unbalance response.The aim of experimental study is to analyse acceleration effect on vibration characteristic and to analyse vibration characteristic of rotor passing through critical speed while offset centre distance and initial twisting are allocated according to one order mode of vibration

Key words: Rotor speed;Acceleration;Critical velocity;Modal vibration test