论文信息 - Reducing Lateral Vibrations of a Rotor Passing Through Critical Speeds by Acceleration Scheduling

Reducing Lateral Vibrations of a Rotor Passing Through Critical Speeds by Acceleration Scheduling

A method is presented for reducing the lateral response of an imbalanced rotor accelerating or decelerating through its first lateral bending critical speed by using a variable acceleration rate. A lumped parameter model along with a numerical integration scheme is used to simulate the response of a simply supported, single disk rotor during fast acceleration and deceleration through critical speed. The results indicate that the maximum response and/or the total vibrational energy ofa rotor passing through the critical speed can be reduced significantly by using a variable acceleration schedule. That is, reducing the acceleration rate after the nominal critical speed is passed. These predictions were verified experimentally for a single disk rotor.

Knox T. Millsaps | Gregory L. Reed

[1] Yukio Ishida,et al. Transient Vibration of a Rotating Shaft with Nonlinear Spring Characteristics during Acceleration through a Major Critical Speed : Vibration, Control Engineering, Engineering for Industry , 1987 .

[2] Michael R. Gluse. Acceleration of an unbalanced rotor through its critical speeds , 1967 .

[3] Knox T. Millsaps,et al. Origin of Split Resonance and Backward Whirl in a Simple Rotor , 1996 .

[4] K. Millsaps,et al. Constant Acceleration of an Undamped Simple Vibrator Through Resonance , 1967, The Journal of the Royal Aeronautical Society.

[5] Th. Pöschl. Das Anlaufen eines einfachen Schwingers , 1933 .

[6] Shin Murakami,et al. Nonstationary Vibration of a Rotating Shaft with Nonlinear Spring Characteristics During Acceleration Through a Critical Speed : A Critical Speed of a 1/2-Order Subharmonic Oscillation , 1989 .