Study on Bifurcation Characteristic of a Cracked Centrifugal Impeller-Rotor with Lateral Fluid Force

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Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (11) : 213-216.

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Study on Bifurcation Characteristic of a Cracked Centrifugal Impeller-Rotor with Lateral Fluid Force

Li Tong-jie1，Wang Juan1, Chen Yun-xiang 2 ，Sun Qig-uo3

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Abstract

The dynamic model of a cracked centrifugal Impeller-rotor with both nonlinear lateral fluid force and nonlinear oil-film force is built and dimensionless equations of the system are derived. The system’s bifurcation characteristics are studied using the numerical integral method. The influence of the nonlinear lateral fluid force and the depth of the crack on the system’s dynamic characteristics are analyzed in detail in the last part of the paper.

Key words

Centrifugal impeller / Cracked rotor / Lateral fluid force / nonlinear oil-film force / bifurcation

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Li Tong-jie;Wang Juan;Chen Yun-xiang ;Sun Qig-uo. Study on Bifurcation Characteristic of a Cracked Centrifugal Impeller-Rotor with Lateral Fluid Force[J]. Journal of Vibration and Shock, 2010, 29(11): 213-216