TY - JOUR
T1 - Experimental Investigations on Nonlinear Dynamic Characteristics of High-Speed Turbine-Generator Rotor System
AU - Ding, Boyao
AU - Yang, Ming
AU - Tian, Jiabin
AU - Sun, Yihao
AU - Xie, Zhongliang
N1 - Publisher Copyright:
© 2001-2012 IEEE.
PY - 2025
Y1 - 2025
N2 - Based on high-speed turbine-generator rotor system supported by gas bearing, the experimental investigations of influence of supply pressure on the dynamic characteristics of rotor system were carried out. Through nonlinear methods for test, the measurement, and analysis, such as bifurcation plot, shaft center orbits, frequency spectrum plot, and 3-D plot of frequency coupling, the experimental results show the characteristics of double low frequency (DLF) and half-speed whirl and the influence of supply pressure on characteristics of critical speed region and fractional frequency whirl. The results show that occurring speed of DLF and half-speed whirl were improved by gas supply pressure addition, which increases gas film stiffness, so improving the stability of rotor system, while vibration supreme amplitude of half-speed whirl is restrained by gas supply pressure dropped, which increases gas film damping ratio.
AB - Based on high-speed turbine-generator rotor system supported by gas bearing, the experimental investigations of influence of supply pressure on the dynamic characteristics of rotor system were carried out. Through nonlinear methods for test, the measurement, and analysis, such as bifurcation plot, shaft center orbits, frequency spectrum plot, and 3-D plot of frequency coupling, the experimental results show the characteristics of double low frequency (DLF) and half-speed whirl and the influence of supply pressure on characteristics of critical speed region and fractional frequency whirl. The results show that occurring speed of DLF and half-speed whirl were improved by gas supply pressure addition, which increases gas film stiffness, so improving the stability of rotor system, while vibration supreme amplitude of half-speed whirl is restrained by gas supply pressure dropped, which increases gas film damping ratio.
KW - Double low frequency (DLF)
KW - gas supply pressure
KW - half-speed whirl
KW - high-speed turbine-generator rotor system
KW - stability
UR - https://www.scopus.com/pages/publications/105012096973
U2 - 10.1109/JSEN.2025.3591128
DO - 10.1109/JSEN.2025.3591128
M3 - 文章
AN - SCOPUS:105012096973
SN - 1530-437X
VL - 25
SP - 33237
EP - 33244
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 17
ER -