超重力模拟试验离心机振动特性的回归分析

王震林; 陈良军; 吕磊; 杨永生

Regression Analysis on Vibration Characteristics of Supergravity Environmental Simulation Centrifuge

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DOI：10.7643/issn.1672-9242.2023.01.015

KeyWord:geotechnical centrifuge regression analysis correlation analysis parameter identification

Author	Institution
WANG Zhen-lin	System Engineering Institution, China Academy of Engineering Physics, Sichuan Mianyang , China
CHEN Liang-jun	System Engineering Institution, China Academy of Engineering Physics, Sichuan Mianyang , China
LYU Lei	System Engineering Institution, China Academy of Engineering Physics, Sichuan Mianyang , China
YANG Yong-sheng	System Engineering Institution, China Academy of Engineering Physics, Sichuan Mianyang , China

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Abstract:

The work aims to investigate the change law of vibration on the bearing housing and the shaft of centrifuges with operation conditions and achieve better prediction of centrifuge vibration under various operation conditions. The vibration data on the bearing housing and the shaft of a centrifuge under various operation conditions were obtained through experiments. The one-degree mathematical model for the centrifuge was established and regression analysis on vibration acceleration and shaft vibration displacement of the centrifuge was conducted based on the proposed model. The experiment results indicated that the fundamental harmonic component of bearing housing vibration rose with the increase of the unbalance and rotating speed. The determination coefficients between the proposed model and the obtained experimental data of bearing housing and pedestal were above 0.9. The determination coefficients of the shaft deflection measured at upper bearing and middle bearing were around 0.7 while it was below 0.1 for the shaft deflection measured at lower bearing. It can be concluded that the proposed regression model provide good explanations and predictions for the vibration of the bearing housing and pedestal and proper approximations for the deflection of the shaft under various operation condition. The analysis results provide references for the design of the vibration monitor system and the vibration prediction of the large experimental centrifuges.