Vibration suppression method of aeroengine multistage rotor based on installation phase optimization
CHEN Yue1,2, CUI Jiwen1,2, SUN Xun1,2, TAN Jiubin1,2
1. Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin 150080, China；
2. Key Lab of Ultra-Precision Intelligent Instrumentation, Harbin Institute of Technology, Harbin 150080, China
Abstract：To achieve the vibration suppression of the rotor system by optimal matching of the installation phases of the multistage rotor of an aero-engine, firstly, a coordinate transfer model of the unbalanced mass points and the centers of assembly lips during assembly was established. Then, the excitation forms of the mass eccentricity and lip eccentricity to the rotor was deduced. Moreover, the coordinate transfer model and the excitation forces were introduced into the dynamic equation of the multistage rotor system. Furthermore, the mathematical relationship between the installation phases of the rotors at each stage and the vibration responses of the rotor system was established. Finally, a normalized evaluation function of the rotor vibration displacements was developed, and the genetic algorithm was used to minimize the rotor vibration displacements and solve the optimal sequence of the installation phases. The calculation results showed that compared with the default phases, the vibration displacements of the rotor system at the critical speeds could be significantly reduced by the optimal installation phases solved with the normalized evaluation function of vibration displacements as the optimization objective, which also better than the vibration suppression effect with the geometric eccentricity and unbalance as the optimization objectives.
Key words: aero-engine; multistage rotor; installation phases optimization; rotor dynamics; vibration response
陈越1，2，崔继文1,2，孙逊1，2，谭久彬1，2. 基于安装相位寻优的航空发动机多级转子振动抑制方法[J]. 振动与冲击, 2022, 41(15): 138-145.
CHEN Yue1,2, CUI Jiwen1,2, SUN Xun1,2, TAN Jiubin1,2. Vibration suppression method of aeroengine multistage rotor based on installation phase optimization. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(15): 138-145.
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