Abstract
A dynamic analysis model of the unbalanced vibration response of a single-rotor system is established to study the corresponding mechanism of the unbalanced excitation force and vibration response caused by the deviation of the rotor mass centroid in this paper, and finally to achieve the combined rotor vibration suppression. First, the installation of multi-stage rotors during vibration was studied, and the rotor mass centroid transfer model in the rotating coordinate system was established to obtain the unbalanced excitation force vectors of the rotors at all levels based on the traditional stacking assembly method and axiality measurement. Second, the rotor unbalance excitation force vectors were substituted at all levels to establish the finite element analysis model of the single-rotor system. Finally, a simulation analysis was carried out for the stacking assembly of the three-stage rotor, and the rotor test piece was used for the vibration experiment. The results show that the optimal assembly phase of the multi-stage rotor obtained by the dynamic analysis model of the unbalanced vibration response of the single-rotor system can effectively suppress the vibration of the combined rotor.
Highlights
In the development and use of advanced rotors, vibration is always one of the main problems [1,2]
To study the corresponding mechanism between the unbalanced excitation force and the vibration response caused by the deviation of the rotor center of mass, the dynamic analysis model of the unbalanced vibration response of the single-rotor system was established in this paper
The dynamic analysis model of the unbalanced vibration response of the single-rotor system established in this paper can directly reflect the corresponding relationship between the rotor installation phase and the vibration amplitude at different speeds
Summary
In the development and use of advanced rotors, vibration is always one of the main problems [1,2]. The stacking model is established by studying the error transmission relationship of the assembly connection surface, which can control the position of the mass centroid of the rotor at each level to suppress vibration [8]. Based on the above reference, it can be seen that, in the research on indirect realization of multi-stage rotor vibration suppression by establishing the multi-stage rotor error transmission relationship and axiality measurement, optimizing the position of the rotor center of mass at all levels or designing system control methods has been more in-depth. Based on the finite element method and the center of mass transfer model in the rotating coordinate system, the dynamic analysis model of the unbalanced vibration response of the singlerotor system is established, and the corresponding mechanism of the unbalanced excitation force and the vibration response generated by the centroid deviation of the rotors at all levels is clear. The rotor vibration suppression is achieved by changing the phase of the rotating rotor
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