Testfree virtual dynamic balance in consideration of doublerotation doubleplane
                                                LI Zhiwei，HE Lidong，ZHANG Zuchen，WAN Fangteng
(Education Ministry Engineering Research Center of Chemical Engineering Safety，Beijing University of Chemical Technology， Beijing 100029，China)

Abstract: In order to solve the multispeed and multiplane balancing problem, a virtual dynamic balancing method based on dynamic response analysis was proposed, which allows for doublespeed and doubleplane testfree virtual dynamic balancing. The finite element model that has similar dynamic characteristics with multiple disk flexible rotor test bench was established based on finite element softwore Dyrobes, through applying virtual unbalance incentives to the balance plane, the vibration response of the different measuring points under different rotating speed was calculated, the mapping relationship between incentive and vibration response was extracted under double balanced speed, the influence coefficient matrix of different correction plane under different rotational speed was gotten.The unbalance vibration of multidisc flexible rotor was tested, the influence coefficient matrix was substituted into the vibration vector equation, and the correction vector was calculated by the least square method.The results show that this method can balance the multispeed of the multidisk flexible rotor under the condition of no test weight, and can achieve the purpose of reducing the fundamental frequency vibration of the rotor under the condition of multispeed, significantly reduce the number of starting and stopping, and improve the dynamic balancing efficiency.

Key words: multidisc flexible rotor; double speed double plane; testfree virtual dynamic balance